LAB TESTING

LAB TESTING

This is a subcontract service. All of the testing programs are carried out by qualified and professional laboratories which has been certified and accredited by ISO/IEC 17025 and CNAS (China National Accreditation Service).

DQC provides this service so that the tested samples are actually coming from the bulk products and therefore the testing result can reflect the actual quality.

From single testing item to multiple product comparison programs, the laboratory testing services can help you minimize the risk of substandard merchandise or costly customer returns.

AVAILABLE TEST ITEMS：

-  Fiber Composition Analysis
-  Fabric Construction Test
-  Colour Fastness Test
-  Dimensional Stability Test
-  Strength Test and Physical Test
-  Functional Property Test
-  Chemical Analysis Test
-  Garment Accessories Test
-  Feather & Down Test
-  Leather Products Test

GARMENT INSPECTION STANDARD

GARMENT INSPECTION STANDARD

Here we introduce our inspection standard with example of Pre-Shipment Inspection (Final Random Inspection).

 

SAMPLING STANDARD
We randomly take samples from finished products according to ANSI/ASQC Z1.4 (MIL-STD-105E).
This is a worldwide sampling standard, and it's same as the standard of BS6001, DIN40080 or ISO2859.

 

DEFECTS CLASSIFICATION
All of product defects are classified as Critical defect, Major defect, and Minor defect.

CRITICAL DEFECT - Critical Defect is defined anything potentially harmful to the product user. A critical defect can be, but is not limited to sharp points/ edges, broken needles, loose components or other foreign items which are potentially harmful.

 

MAJOR DEFECT - Major defect is a serious defect, which in its present condition, affects appearance, performance or durability to such a degree that a customer would not buy the product if they saw the defect; or the defect will result in dissatisfaction when first worn or after one washing. Any key fit measurement that jumps one size or grade is counted as a major defect.

 

MINOR DEFECT - Minor defect is a serious departure from client’s construction specifications and quality standards that affects its appearance or durability and, therefore, reduces its salability at full price.

 

AQL (Acceptable Quality Level) STANDARD
Critical defect: AQL = 0
Major defect: AQL = 2.5
Minor defect: AQL= 4.0
(Unless others specified by customer)

INSPECTION PERFORMANCE STANDARD
Inspection performance standard is varied for different product construction, such as bedding, pillows, throws, table cloths, towels, and down products.

Inspection performance standard includes different contents for different end use of fabrics, trims & accessories, or labels. For example, labels should meet the following standard:

A product must be labeled with:

• Brand Name
• Fiber Content
• Country of Origin
• RN# or WPL#; or the name and address of the manufacturer or distributor
• Care instruction

A Care Label should be:

• Care label contents must meet all requirements of the Care Labeling

Rule. Provision of practical care instructions is required.

• All care labels must remain legible and securely attached through the

laundering cycle and for the life of the garment.

• Will be determined by the testing lab upon completion of all colorways

of actual production sample.

• All trims and hardware must be able to withstand selected care method.

Garment Inspection Performance Standard

Garment Inspection Performance Standard

As a garment inspection specialist with more than 12 years experience, DQC is expert in garment quality assurance and has a set of guideline for garment inspection performance standards.
 The performance standard includes:

•  Fabrics.
•  Trims and Accessories.
•  Labeling.
•  Garment Construction for Woven Shirts, Tops, and Blouses.
•  Garment Construction for Knitted Shirts, Tops, and Blouses.
•  Garment Construction for Woven Pants, Slacks, and Shorts.
•  Garment Construction for Knitted Pants, Slacks, and Shorts.
•  Garment Construction for Woven Dresses, Jumpers, Rompers, and Skirts.
•  Garment Construction for Knitted Dresses, Jumpers, Rompers, and Skirts.
•  Garment Construction for Underwear: Panties, Briefs, and Boxer shorts.
•  Garment Construction for Underwear: Brassieres, and Foundation garments.
•  Garment Construction for Sweaters.
•  Garment Construction for Sleepwear.
•  Garment Construction for Activewear.
•  Garment Construction for Outwear.
•  Garment Construction for Swimwear.


 For example, the garment construction for woven shirts, tops, and blouses should meet the following standard:


•  Pockets – Shall be uniform in size and placed evenly or aligned.
•  Seams – Finished and back tacked at ends. No untrimmed threads. Free from puckering. Must use with correct tension.
•  Stitching – Thread must be colorfast. No broken top stitches. No open seams.
•  Darts – Uniform in length and shape. No puckering or bubbles.
•  Stress Points –Must be bartacked or reinforced as necessary.
•  Interfacing – Must have compatible shrinkage to shell fabric. Must lie flat.
•  Buttons – Must be securely fastened and colorfast, button holes must be compatible and completely stitched around.
•  Snaps, Rivets, And Trims – No corroding. Securely fastened and reinforced.
•  Elastic And Ribbing – Must extend to fullest width of fabric without breaking stitches. Tunneled elastic must be stitched down to prevent twisting and rollover. No exposed elastic.
•  Needle Cutting – Correct needle size and type for fabric. No needle cuts.
•  Zippers – Must be correct duty zipper for garment. No bulging or wavering on tape. Ends of tape must be securely fastened.


 DQC also knows that, each style/construction for different sales markets should have different Minimum Attributes Standards. For example, Knit Tops, Dresses, or Outerwear for super market should meet the following attributes standard, unless others specified:


•  Stitches per inch – joining seams 10, +2/-1
•  Stitches per inch – topstitching 10
•  Seams – clean finished; no raw, open, twisted seams
•  3 Thread Overlock (504) all joining seams unless specified otherwise
•  Reinforce shoulder seam with preshrunk twill tape or Quick-Stretch elastic tape
•  Backtack stitching at least 5-6 stitches
•  Bartack or reinforce stitch - all stress points as specified and applicable
•  Tops Hem – circular construction
•  Dress Hem – circular construction
•  Neck/Cuff – if set flat, seam must be tacked or topstitched appropriately
•  Vents/Plackets clean finished as specified


 Different criteria should be used for different styles or construction, such as Knitted shirts/tops/blouses, Sweaters, Woven slacks/pants/shorts, Knitted slacks/pants/shorts, Woven dresses/jumpers/rompers/skirts, Knitted dresses/jumpers/rompers/skirts, Activewear, Sleepwear, Underwear, Outwear, Swimwear.