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Monday, August 22, 2016

QUALITY POLICY AND OBJECTIVE
























QUALITY ASSURANCE MANUAL

NOTE 1: This is a CONTROLLED Document as are all quality system files on this server. Any documents appearing in paper form are not controlled and should be checked against the server file version prior to use.
NOTE 2: The document below is a high level sample. For a comprehensive MS-Word based template, we would suggest the one included within the ISO 9000 Management Kit (commercial site).

CONTENTS

Procedures are titled as an example only (not linked)

Section Title

Related Procedure

1. Introduction & Company Profile
2.Policy & Objectives
3.Definitions
4.Quality System
5.OrganizationOrganization Chart
6. Authority & Responsibilities
7.Compliance to ISO9001
8.Management Review &
Internal Audit
Management Review


Internal Audit
9.Contract ReviewProduct Sales
10.DesignSystem Design
11. Documentation & Change ControlExternal Documents


Quality System
Documentation
12.PurchasingPurchasing
13.Customer Supplied Items
14.Process ControlProduct Installations


Maintenance
15.Receiving InspectionReceiving Inspection
16. Inspection & Testing
17.Production & Measuring Equipment
18. Indication of Inspection StatusInstallation


Material Control


Maintenance
19.Non-conforming Items, Preventive
& Corrective Action
20.Handling, Storage, Packaging,
Preservation & Delivery
21.Records
22.TrainingTraining
23.ServicingMaintenance


1.0 INTRODUCTION

Net Work Systems Service was formed in 1984 to satisfy customer requirements for data networking products. This business has developed well and is expanding successfully.
Additional capabilities have been added to the organization to include technical assistance and support, installation, maintenance of products and systems, and design of systems.
The company is now engaged in including design, engineering, stocking and distribution, installation, commissioning and maintenance of equipment and systems.
This Quality System relates to the full range of company activities.

2.0 POLICY and OBJECTIVES

Net Work Systems' quality policy is to achieve sustained, profitable growth by providing services which consistently satisfy the needs and expectations of its customers.
This level of quality is achieved through adoption of a system of procedures that reflect the competence of the Company to existing customers, potential customers, and independent auditing authorities.
Achievement of this policy involves all staff, who are individually responsible for the quality of their work, resulting in a continually improving working environment for all. This policy is provided and explained to each employee by the Managing Director or Quality Manager.
To achieve and maintain the required level of assurance the Managing Director retains responsibility for the Quality System with routine operation controlled by the Quality Manager.
The objectives of the Quality Assurance System are:
a) To maintain an effective Quality Assurance System complying with International Standard ISO9001 (Quality Systems).
b) To achieve and maintain a level of quality which enhances the Company's reputation with customers.
c) To ensure compliance with relevant statutory and safety requirements.
d) To endeavor, at all times, to maximize customer satisfaction with the services provided by Net Work Systems
H Bridge - Managing Director
October 1995

3.0 DEFINITIONS

The terms and descriptions used in this Manual are generally defined within ISO9001 - Quality Systems.
Additional definitions apply for items not covered by the documents:
Site Any location, other than the Company's established premises, where work is undertaken as part of a formal contract

4.0 QUALITY SYSTEM

The Quality Assurance System applies to all activities of the Company, and has been developed in accordance with ISO9001. The Quality Assurance System is fully documented and structured in 3 levels:
Level 1 : Quality Manual
This document details the corporate quality policy and structure of the Company and references appropriate Operating Procedures.
Level 2 : Operating Procedures
These documents describe the actual process, and controls applied, to all activities concerned with the attainment of a quality assured contracting service.
A list of Operating Procedures is given in the Index Section of this Quality Assurance Manual.
Quality Planning
As the Company operates a standard type and range of services, customer satisfaction and quality are achieved by operation in accordance with the documented quality system. Specific customer requirements are identified and documented during the contract review process, allowing these requirements to be communicated and achieved, ensuring satisfaction of all customer declared needs.

5.0 Organization

Click on any position to see the responsibilities for that person.
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If not, move down to the text descriptions




6.0 AUTHORITY & RESPONSIBILITIES

6.1 Authority

6.1.1 All staff are allocated with authority to perform their allocated responsibilities. The following provides a summary of the principal responsibilities of each job role, and these are clarified in greater detail within the Operating Procedures.
6.1.2 All staff share the authority and responsibility of identifying noncompliances or possible improvements, and recording these instances such that corrective action can be taken, both to rectify the immediate situation and to prevent recurrence.
6.1.3 The Managing Director continually reviews the company's resources to ensure that adequate staff, equipment and materials are available to meet customer requirements.

6.2 Responsibilities

6.2.1 Managing Director
  • Approval of the Quality Assurance System
  • Management Review
  • Design Control
  • Supplier Selection & Purchasing
  • Contract Management & Control
  • Training
6.2.2 Quality Manager (ISO9001 Management Representative)
  • Internal Audit
  • Resolution of Quality Assurance System Discrepancies
  • Control & Maintenance of the Quality Assurance System
  • Documentation & Change Control (Quality System Documents)
6.2.3 Sales Director
  • Management & Co-ordination of Sales and Support Functions
  • Contract Review
  • Sales Order Processing
  • Design Control
  • Estimating
  • Project Management
  • Control of Contract Documentation
  • Planning & organization
  • Supplier Selection & Purchasing
  • Definition of Installation, Inspection, Test & Maintenance Requirements
  • Training
6.2.4 Sales Managers
  • Quotations
  • Contract Review and Order Processing
6.2.5 Support Manager
  • Planning and Co-ordination
  • Control of Production and Measuring Equipment
  • Maintenance of Support Stores
  • Processing of Sales Orders
  • Purchasing
6.2.6 Support Engineers
  • Planning & Performance of Installation, Technical Assistance,
  • Repairs, Testing and Maintenance Activities
  • Control of Equipment and Materials Allocated
6.2.7 Financial Director
  • Control of Finance, Accounts and Warehouse Operations
  • Training
  • Supplier Selection and Purchasing
6.2.8 Warehouse
  • Control of Stock
  • Replenishment Recommendation
  • Protection and Preservation of Stock
  • Receiving Inspection
  • Packaging and Despatch
6.2.9 Business Development Manager
  • Sales
  • Estimating
  • New Product Identification & Evaluation
  • System Design
6.2.10 Administration Order Processing Clerk
  • Sales Database Administration
  • Checking of Sales Orders
  • Allocation of Order Reference Numbers

7. COMPLIANCE WITH ISO9001

This Quality System is structured with policy statements relating to each area of activity being within the relevant Operating Procedure. However, the following items of ISO9001 are not addressed within the operating procedures as they are not applicable to this Company:
  • Statistical Techniques

8. MANAGEMENT REVIEW and INTERNAL AUDIT

Management review of the suitability and effectiveness of the Quality System take place at least twice per year. During the management meetings actions are allocated and minuted to record the development of the Company's management system.
The objectives of Management Review are:
a) To establish that the Quality (Management) System is achieving the expected results and meeting the Company's requirements, continuing to conform to the Standard, continuing to satisfy the customers needs and expectations, and functioning in accordance with the established Operating Procedures.
b) To expose irregularities or defects in the System, identify weaknesses and evaluate possible improvements.
c) To review the effectiveness of previous corrective actions, and to review the adequacy and suitability of the management system for current and future operations of the Company.
d) To review any complaints received, identify the cause and recommend corrective action if required.
e) To review the finding of internal/ external audits and identify any areas of recurring problems or potential improvements.
f) To review the reports of nonconforming items and trend information to identify possible improvements.
Internal audits of the Quality System are undertaken at least once per annum to confirm that the function concerned is adhering to the Company's Procedures. A comprehensive Audit Programme is compiled at least a year in advance however, should particular needs be identified, the frequency of audit may be increased at the discretion of the Quality Manager.
Audits are undertaken by auditors who are trained in auditing and not directly responsible for the functions being audited within that Company. Nonconformance observed is brought to the attention of the person responsible, and is recorded, documented and subject to timely corrective action to ensure full rectification.

9. CONTRACT REVIEW

The Company offers both standard products and specialist services to meet each customer's needs. Standard products are displayed in a catalogue for customer selection. Specialist service requirements differ from one customer to another (and from one contract to another), therefore each tends to be quoted for the specific contract.
Once a proposal is accepted by the customer, or an order is placed, it is recorded and reviewed to establish that the requirements of the order are adequately defined and documented, any differences from the proposal are resolved, and the Company is capable of fully satisfying the customers requirements.
In addition to the original order/ contract specification the customer may also request addition/ variation work to be undertaken by the Company. In these circumstances the work content is documented and agreed with the customer prior to execution to ensure that no ambiguity exists.
The Company operates on a computerized order processing system to ensure rapid fulfillment of customer orders.

10. DESIGN CONTROL

All Design activities are strictly controlled to ensure that the design output information complies with customer/ contract requirements, and all design input data.
Design activities are planned and normally executed by specialists and are subject to regular management, review and verification by the Sales Director, and where relevant, agreement with the Customer.
The design input and output items are documented, and where ambiguity exists, will be clarified and documented. All items of design documentation and notes are recorded in a design project file. Design output documentation is produced and reviewed to ensure that it:
  • meets the design input,
  • references the design input or appropriate criteria,
  • and identifies all of the characteristics which are critical to the safe and effective operation of the system(s).
Design output is reviewed and approved by the Sales Director, and is also provided to the Customer for approval prior to use. Validation of the design is achieved during commissioning of the system to confirm compliance to the customer's requirements.
The designer is required to specify any inspections or tests which may verify the design, by practical means, at the earliest possible stage of development.
All changes to the design criteria, input or output are subject to strict review and documentation control procedures.

11. DOCUMENTATION & CHANGE CONTROL

All documentation utilized within the Company related to the management system itself, or to the execution of individual customer contracts is controlled to ensure that it is issued to the appropriate personnel, under the correct level of authority, is revised and reissued as necessary, and all obsolete versions are removed from the point of use.
Such documentation typically includes:
Specifications, Customer Orders, Plans/ Drawings,
Quality Assurance Manual/ Operating Procedures,
National/ International Standards and Codes of Practice.
The Quality Assurance Manual, Procedures and Quality Plans are maintained by the Quality Manager who ensures that the appropriate items, at the correct revision levels, are issued to all who need them within the Company.
National/ International Standards, Codes of Practice are maintained by the Support Engineers who ensure that appropriate documents are available within the Company, and are issued at the correct revision levels. External suppliers of documentation are contacted regularly to ascertain that the documents held remain current.
The distribution of standard documents is controlled and recorded on Distribution Lists, which also show the current issue status. The Distribution Lists are reviewed and updated as changes occur.
All changes to documents are reviewed and approved by the person responsible for the original issue and, where appropriate, the nature of the change is indicated on the document. Master copies of the revised documents are retained as records of the changes and renewed as necessary to ensure clarity.
Each contract has a File which contains all relevant information. Information is also held on the company's computer system for ease of access and manipulation.

12. PURCHASING

Suppliers of products, materials and services, where unspecified by a customer contract, are selected on their ability to meet the company's requirements given due consideration to the quality, statutory obligations, timescale and cost. A list of approved suppliers and sub-contractors is maintained which is compiled on the following criteria:-
a) Previous performance in supplying to similar specifications and requirements.
b) Stocking of high volume standard items conforming to a relevant British Standard, or supplied with a statement of conformity.
c) Compliance with an approved third party product/ quality registration scheme.
d) Recommendation by other similar purchasers or manufacturers of equipment.
e) A trial order and evaluation of performance.
All supplies and sub-contracts are subject to an authorized Purchase Order providing full clarification of the type and extent of supply.
Should a supplier, not appearing on the Approved Suppliers List be proposed, they will be analysed by capability and subject to acceptance on the authority of a Director.

13. CUSTOMER SUPPLIED ITEMS

Goods received from customers (i.e. free issue items or equipment being serviced) are always visually inspected at the receipt stage, with any un-declared non-conformance being immediately reported to the customer.

14. PROCESS CONTROL

All productive work is planned and undertaken in accordance with the company's procedures, and any specific documents agreed for individual contracts (e.g. contract specifications).
Work instructions are provided by the agreed contract specification and any documents referenced therein, alternatively work is performed in accordance with nationally accepted codes of practice (e.g. BS6701).

15. RECEIVING INSPECTION

All stores areas are maintained as secure as practical. All items received by the Company are identified and verified in accordance with the requirements of the Delivery Note and Purchase Order, and are inspected for correct identity, quantity and any signs of damage.
All goods received are documented and, in the event of non-conformance, the items are placed in a reject area or labelled to ensure identification. The extent of the non-conformance is noted and subject to disposition review by nominated personnel.

16. INSPECTION AND TESTING

Inspection and testing is carried out on completion of installation and maintenance activities, with results being documented. Should items not be acceptable against the agreed contract criteria they will either be repaired, replaced or identified for a subsequent evaluation and decision. All repaired items are subject to a re-inspection to ensure acceptability.
On completion of installation and maintenance works, the customer is also invited to check the work performed to ensure full acceptability.

17. PRODUCTION & MEASURING EQUIPMENT

Production and measuring equipment held is maintained in good condition, and capable of safe and effective operation within a specified tolerance of accuracy. Test and measuring equipment is regularly inspected or calibrated to ensure that it is capable of accurate operation, by comparison with external sources traceable back to National Standards.
Electrostatic protection equipment is utilized when handling sensitive components, and this equipment is regularly checked to ensure that it remains fully functional.

18. INDICATION OF INSPECTION STATUS

As goods are inspected, the status is defined by location in stores, with all non-conforming items being placed in a reject area or marked as reject for review. The status of work in progress is established by markings or associated documentation recording the inspections undertaken and their acceptability.

19. NON-CONFORMING ITEMS, PREVENTIVE & CORRECTIVE ACTION

Once non-conforming items have been noticed they are identified by location, associated documents, or specific markings to prevent their inadvertent use. All non-conforming items and customer complaints are subject to review and rectification by nominated personnel. The type and extent of non-conformity is documented in order to establish trends and identify possible areas for improvement.
The corrective action required to prevent recurrence is evaluated, documented, and its effective implementation is monitored. All rectification is subsequently re-inspected to ensure complete customer satisfaction.
All employees are encouraged to suggest improvements in methods, materials, suppliers,
and sub-contractors. The Company has established procedures for review of all activities in order to identify and evaluate all possible improvements in methods/ materials and its procedures.

20. HANDLING, STORAGE, PACKAGING, PRESERVATION & DELIVERY

The identification of materials/ equipment, where it is not obvious, is confirmed by the presence of a manufacturers/ suppliers part number or description label, or other marking for each item. The identification of the item may be on the packaging or on the item itself, and this identification remains in place for as long as possible, provided it does not hamper effective use of the item. Materials and consumables are not identified by the company where they are obvious to a trained/ experienced employee, however, should a risk of misinterpretation exist between two or more types of material these will be marked in a suitable manner to ensure that no ambiguity exists.
All items with serial numbers are recorded individually.
Materials and goods received, whether the property of the company or others, will, as far as practicable, be protected and their quality preserved until such time as they are transferred to a customer, or disposed of to a third party. The objective is to prevent deterioration and damage whilst in storage, or in the process of transportation, installation, commissioning or maintenance.

21. RECORDS

Storage facilities are allocated which ensure that all stored records are identifiable and retrievable, and the storage areas are free from damp and other agents which could cause premature deterioration.
Where records are maintained on computer magnetic media, and these are subject to "back-up" at regular intervals, with the "back-up" information being stored in a protected location to ensure security from loss/ damage of active data.
All records are retained for a minimum of 2 years.

22. TRAINING

The policy of the company is to ensure that all personnel are trained and experienced to the extent necessary to undertake their assigned activities and responsibilities effectively. The company generally procures and recruits employees capable of meeting the technical, skill, experience and educational requirements of the company's activities.
All staff and senior employees are responsible for recommending the training needs of others, and for ensuring that all employees allocated specific tasks are suitably qualified and experienced to execute those tasks. Once training needs are identified these are provided under the responsibility of the Directors.
Full records are maintained of all training undertaken by employees.

23. SERVICING

Service and maintenance contracts are offered to all customers, and these activities are controlled in the same manner as Process Control.

Sunday, August 21, 2016

Faults in the Knitted Fabrics (part 7)



WetSqueezer Marks
Definition:
The fabric on the edges of the fabric tube gets permanent pressure marks due to the hard pressing by the squeezer rolls. These marks appear as distinct lines along the length of the fabric & can’t be corrected.

Causes:
  • These marks are caused due to the excessive pressure, of the squeezer rolls of the Padding Mangle, on the wet fabric, while rinsing.
Remedies:
  • Use the Padding mangle only for the application of the softener.
  • Use a hydro extractor (Centrifuge) for the extraction to avoid the squeezer roll marks.
  • Soon after extraction open the fabric manually to prevent crease marks in the damp fabric.
FoldingMarks
Definition:
Fold marks appear as distinct pressure marks along the length of the fabric.

Causes:
  • High pressure of the fabric Take Down rollers of the Knitting machine on the grey fabric is one of the main causes.
  • Too much pressure of the feeding rolls of the Calander & Compactor is the primary cause of the folding marks in the knitted fabric.
Remedies:
  • Adjust the gap between the two rolls as per the thickness of the fabric sheet .
  • Gap between the two Calander rolls should be just enough to let the rolls remove the wrinkles in the fabric but put no pressure on the fabric sheet especially in the case of Pique & structured fabrics.
CreaseMarks
Definition:
Crease marks appear in the knitted fabric, as dark haphazard broken or continuous lines.

Causes:
  • Damp fabric moving at high speed in twisted form, in the Hydro extractor (Centrifuge)
Remedies:
  • Use anti Crease, during the Scouring & the Dyeing process .
  • The use of anti Crease, swells the Cellulose & prevents the formation of Crease mark.
  • Spread the fabric in loose & open form & not in the rope form, in the Hydro Extractor.
HighShrinkage
Definition:
The original intended measurements of the Garment go, haywire, during storage or after the very first wash.

Causes:
  • High Stresses & strains exerted on the fabric, during Knitting, Dyeing & Processing & the fabric not being allowed to relax properly, thereafter.
  • High shrinkage is primarily due to the fabric being subject to high tension, during the Knitting, Dyeing & the Finishing processes
Remedies:
  • Keep the Grey Fabric in loose plated form, immediately after the roll is cut.
  • Store the finished fabric also in the plated form & not in the roll form.
  • Allow the fabric to relax properly, before it is cut.
  • Give maximum overfeed to the fabric, during the processing, on the Stenter, Compactor & the Calandering machines.
GSMVariation
Definition:
The fabric will appear to have a visible variation in the density, from roll to roll or within the same roll of, the same dye lot.

Causes:
  • Roll to roll variation in the, process parameters, of the fabric, like; Overfeed & Width wise stretching of the dyed fabric, on the Stenter, Calender & Compactor machines.
  • Roll to roll variation in the fabric stitch length.
Remedies:
  • Make sure that all the fabric rolls in a lot, are processed under the same process parameters.
  • The Knitting Machine settings, like; the Quality Pulley diameter etc. should never be disturbed.
FabricWidth Variation
Definition:
Different rolls of the same fabric lot, having difference in the finished width of the fabric.

Causes:
  • Grey fabric of the same lot, knitted on different makes of Knitting Machines, having varying number of Needles in the Cylinder.
  • Roll to roll difference, in the Dyed Fabric stretched width, while feeding the fabric on the Stenter, Calander & Compactor.
Remedies:
  • The whole lot of the grey fabric should be knitted on the same make of knitting machines.
  • For the same gauge & diameter of the knitting machines, there can be a difference of as high as 40 needles, from one makes to the other make of the machine.
  • This difference, in the number of needles, causes a difference of upto 2”-3” in the finished width of the fabric
  • The stretched width of the grey fabric should remain constant, during finishing on the stenter.
Measurement Problems
Definition:
The measurements of the garments totally change after, a few hours of relaxation & after the first wash. The arm lengths or the front & back lengths of the garments may vary, due to the mix up of the parts.

Faults in the Knitted Fabrics (part 6)



FabricPress Off
Definition:
Fabric press off appears as a big or small hole in the fabric caused due to the interruption of the loop forming process as a result of the yarn breakage or closed needle hooks.

Press off takes place, when the yarn feeding to both the short butt & long butt needles suddenly stops due to the yarn breakage.

At times complete fabric tube can fall off the needles if the needle detectors are not functioning or are not properly set.

Causes:
  • End breakage on feeders with all needles knitting.
  • Yarn feeder remaining in lifted up position due to which the yarn doesn’t get fed in the hooks of the needles.
Remedies:
  • Needle detectors, should be set precisely to detect the closed needles & prevent the fabric tube from completely pressing off.
  • Proper yarn tension should be maintained on all the feeders.
SurfaceHairiness & Piling
Definition:
Surface hairiness appears in the form of excess superfluous fibers, on the surface of the knitted fabrics, which have either been reprocessed, or tumble dried.

Pilling appears as, small fiber balls formed on the fabric surface, due to the entanglement of loose surface fibers.

Factors such as, the fiber staple length, low T.P.M. & fabric construction (with long yarn floats) etc. also contribute to pilling.

Causes:
  • Abrasion due to the contact with rough surfaces
  • Excessive surface hairiness caused, due to the abrasive tumbling action
  • Fabric friction in the Tumble Dryer
  • Rough Dyeing process & abrasive machine surfaces (Soft Flow Machine tubes, Tumble Dryer drum etc.)
  • Reprocessing of the fabric is, also a major cause of piling.
Remedies:
  • Avoid using the Tumble Dryer.
  • Control shrinkage by maximum fabric relaxation & over feed in the processing.
  • Regularly inspect the fabric contact points on all the machines, for any rough & sharp surface.
  • Avoid repeated reprocessing of the fabrics.
  • Use anti pilling chemical treatments for the fabrics prone to pilling.
Snagging
Definition:
Snagging appears on the knitted fabric surface as a pulled up yarn float showing up in the form of a large loop.

Causes:
  • Caused by the pulling or the plucking of yarn from the, fabric surface, by sharp objects.
Remedies:
  • Inspect & rectify the fabric contact points on all the machines (Soft Flow Dyeing, Tumble Dryer & Centrifuge etc), on which snagging is taking place.
Bowing
Definition:
Bowing appears as rows of courses or yarn dyed stripes forming a bow shape along the fabric width.

Causes:
  • Uneven distribution of tensions across the fabric width while dyeing or finishing the fabric.
Remedies:
  • Bowing can be corrected by reprocessing the fabric by feeding it from the opposite end.
  • A special machine (MAHLO) is also available for correcting the bowing in the knitted fabrics.
DyeingPatches
Definition:
Dyeing patches appear, as random irregular patches on the surface of dyed fabrics.

Causes:
  • Inadequate Scouring of the grey fabric is one of the primary causes of the dyeing patches.
  • Improper leveling agent is also one of the causes of dyeing patches.
  • Correct pH value not maintained.
  • Dyeing machine stoppage due to power failure or the fabric entanglement in the dyeing machine are a major cause of the dyeing patches.
Remedies:
  • Scour the grey fabric thoroughly to remove all the impurities from the fabric before dyeing.
  • Use appropriate leveling agents to prevent patchy dyeing.
  • Maintain the correct pH value during the course of dyeing.
  • Use a power back up (Inverter) for the dyeing operation to be completed uninterrupted.
SoftenerMarks
Definition:
Softener marks appear as distinct irregular patches in the dried fabric after the application of softener.

Causes:
  • Softener not being uniformly dissolved in water
Remedies:
  • Scour the grey fabric thoroughly to remove all the impurities from the fabric before dyeing.
  • Ensure that the softener is uniformly dissolved in the water & doesn’t remain un-dissolved as lumps or suspension.
  • Use the right softener & the correct procedure for the application.
  • Maintain the correct pH value of the softener before application.
Stains
Definition:
Stains appear as spots or patches of grease oil or dyes of different color, in a neat & clean finished fabric surface.

Causes:
  • Dyeing Machine not cleaned thoroughly after dyeing a lot.
  • Grease & Oil stains from the unguarded moving machine parts like; Gears Shafts Driving Pulleys & Trolley wheels etc.
  • Fabric touching the floors & other soiled places during transportation, in the trolleys.
  • Handling of the fabric with soiled hands & stepping onto the stored fabric with dirty feet or shoes on.
Remedies:
  • Wash & clean the dyeing machine thoroughly after dyeing every dye lot.
  • Follow the dyeing cycle of Light- Medium- Dark shades & then the reverse the cycle while dyeing the fabric.
  • All the lubricated moving machine parts should be protected with safety guards.
  • Make sure that the fabric is neatly packed in or covered with Polythene sheets while transporting or in storage.
  • Handle the fabric carefully with clean hands & do not let anyone step onto the stored fabric.
ColorFading (Poor Color Fastness)
Definition:
The color of the garment or the fabric appears lighter & pale in comparison to the original color of the product after a few uses.

Causes:
  • Dyeing recipe i.e. the poor fixing of the dyes is a major cause of color fading.
  • Using the wrong combination of colors in a secondary or tertiary shade.
  • Use of strong detergents & the quality of water are also the common causes for color fading.
  • Prolonged exposure to strong light will also cause the colors to fade.
  • High level of acidity or alkalinity in the perspiration of individuals also causes color fading.
Remedies:
  • Use the correct dyeing recipe i.e. the appropriate leveling, fixing agents & the correct combination of dyes.
  • Follow the wash care instructions rigidly.
  • Use mild detergents & soft water for washing the garments.
  • Don’t soak the garments for more than 10- 15 minutes in the detergent prior to washing
  • Turn the wet garments inside out while drying.
  • Dry in shade & not in direct sunlight.
  • Protect the garments against prolonged direct exposure to strong lights (show rooms or exhibitions etc.).
ShadeVariation
(Roll to roll & within the same roll)

Definition:
Sometimes there appears to be a difference in the depth of shade between the roll to roll & from place to place in the same roll. The defect will show up clearly in the garments manufactured from such fabric.

Causes:
  • Shade variation can be as a result of mixing of the, fabrics of two different lots.
  • Shade variation is also caused, by the variation in the process parameters i.e. Time, Temperature & Speed etc. from one fabric roll, to the other.
  • Shade variation can appear to be, in fabrics with GSM variation, caused due to the uneven stretching, unequal fabric overfeed % etc.
Remedies:
  • Ensure that the grey fabric used for one shade is knitted from the same lot of the yarn.
  • Ensure that the same process parameters (Width, Overfeed, Temperature & Machine Speed etc.) are used for each roll of a dye lot.
TonalVariation
Definition:
Roll to roll or within the same roll difference in the color perception i.e. Greenish, Bluish, Reddish or Yellowish etc. is attributed as tonal variation in the shade.

Causes:
  • Wrong Dyeing recipe
  • Wrong leveling agent selection or wrong dyes combinations.
  • Improper fabric Scouring.
  • Impurities like Oil & Wax etc. not being completely removed in Scouring
  • Level dyeing not being done due to the inappropriate leveling agents.
  • Variation in the process parameters, e.g. Temperature, Time & Speed etc .
Remedies:
  • Use appropriate leveling agents to ensure uniform & level dyeing.
  • Scour the grey fabric thoroughly to ensure the removal of all the impurities.
  • Ensure that the whole lot of the dyed fabric is processed under uniform process parameters.