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How to Wash Laundry Clothing in LAB

Laundry Clothing:

These accelerated laundry clothing tests are to evaluate the color fastness to washing of fabrics and garments. The fabric or garment color loses and surface changes are resulting by this test. Method we use: FOR USA / CANADA: AATCC 135 and FOR EUROPE:  ISO 105

Specifications of Launder Tester:

Specifications Name Specifications Value
Product Category Lab
Machine Category Launder Tester
Product Name Launder Tester
Product Model According to Manufacturer
Product Class New
Origin Made in China
Brand/ Manufacturer Name of Manufacturer
Agent in Bangladesh No/Yes
Power 380v
Temperature Normal
Certification SGS/Others
Production Capacity NA
Compressor France taikang
Delivery in stock, prompt ship
temp.accuracy <+-1 degree
OEM/ODM Available
Temp range 0-100 degree
humidity range 35%RH-95%RH
Time range 1-99.99 hour
rotating holder 0-10rpm/min
circulating air 0.02-0.5m/s
heating power 1500w
dimension 50*50*60cm
weight 157kg
Description For cotton, wool, silk, hemp for laundry clothing

How To Wash Laundry :

Heat the waterbath at Digiwash to 40°C

 

how to wash laundry
Digiwash to 40°C

Prepare 150 ml sol. ECE dtgnt at 40°C, 10 steelballs and specimen inside containier

 

how to wash laundry Prepare 150 ml sol
Prepare 150 ml sol

Put inside Digiwash and process for 30 min

 

laundry clothing inside Digiwash
Inside Digiwash

Take out the specimen, then dry

laundry clothing Evaluation process
Evaluation process

Evaluation process

Dry rubbing

Wet rubbing laundry clothing

Customer Wash Evaluation to Insure Quality –CWIQ

The CWIQ program is to ensure that the after wash performance of apparel or textile products meets the customer expectations. The factory conducts  this evaluation after the 1st 1200 pieces per color are complete. The CWIQ evaluation is performed on the 1st shipment only of a style. Agent/Vendor QA will review and confirm the results as part of their Final Random Inspection (FRI). Evaluations are conducted at the factory’s facility in American washers and dryers.

Two apparels or textile products in each color way are to be pulled for analysis . One product in each color way is to be washed 3 times and dried 3 times , according to the care label instructions approved for that product. The after laundry clothing appearance of that product is then compared to the unwashed product.

Reqired Materials to complete testing

  1. American washer and dryer- it is recommended that AATCC approved brand names such as Whirlpool or Kenmore is used.
  2. Gray scale.
  3. Pilling Standard.
  4. Overall Smoothness Appearance Standard.
  5. Seam Smoothness Board.
  6. Viewing board.
  7. Household Detergent -American Label Tide.

Procedure

Two apparel or textile products in each way are to be pulled for analysis.    Read the care label instructions carefully. Compare the apparel or textile products to each other , to confirm that they are identical, including specification measurements. Measure one apparel or textile product in length and width as indicated by the point of measure used on the technical specification. Record these measurements on the CWIQ worksheet , under dimensional stability , unwashed .      Tops – the measurements should be body length and chest width.    Bottoms – the measurements should be waist and inseam/skirt length. An exception to this is full elastic bottoms , the width measurement should be the hip, low hip if applicable, instead of waist.

Washing laundry clothing procedure

Launder the measured apparel or textile product according to the care label instructions , using household detergent. Include a twin size mark sheet , in 100% white cotton , to help balance the wash and dry load. Use 1 twin flat sheet to reduce the potential of excessive wrinkling sometimes caused by a fitted sheet. The sheet may be used on multiple evaluations, as long as no color transfer has occurred . Multiple garments may be included in a laundry clothing or dry cycle as long as the color family is complementary and there are no ‘wash separately’ instructions included in the care label. Repeat the wash and dry process three times, according to care label instructions.

Drying Procedure

When care instructions call for ‘tumble dry low’, the temperature should be 137 degree Fahrenheit, +/- 5 degrees.

Tumble dry low – set heat temperature low

Time setting-      Knits- approx. 45 min

Woven-  approx. 25 min

Sweaters- approx. 35 min

After the product has been completed the laundry clothing and dry requirements, lay flat and allow to condition for a minimum of 4 hrs. Follow all care label instructions , including any ironing. If no ironing instructions are included , no ironing should be done. Care instructions ‘when needed’ means whenever the average consumer would find it necessary to iron in order to be satisfied with the overall appearance or specifically if the garment is a woven fabric. Hand iron weight is not to exceed 3 pounds.

With product flat, measure the length and width as indicated by the point of measure used on the technical specification. Record these measurements on the CWIQ worksheet , dimensional stability , washed. Calculate the shrinkage percentage and record on the CWIQ worksheet , dimensional stability and shrinkage.

After measuring , hang both products on the viewing board. Standing 4 feet from the board, compare the after wash product appearance to the unwashed product, using the appearance performance requirements. Both front and back appearance is to be compared.

The overall rating of satisfactory or unsatisfactory is based upon all the observations, both shrinkage and appearance requirements.

Appearance requirements

The following appearance requirements are to be compared between the washed and unwashed product. Where appropriate , the performance requirement has been given. The performance rating observed using a standard, such as the grey scale or a visual observation, must be entered on the CWIQ worksheet on the line in front of each appearance requirement. All observations are to be made by comparing the washed and unwashed product and using the performance standard indicated.

Appliqués , buttons or trim items securely attached. This is a visual observation that all appliqués, buttons, or trim items are securely attached after wash .Observation results are pass or fail

Needle cuts or chews. This is a visual observation for any evidence of needle cuts or chews after wash. Observation results are Pass or fail.

Color bleeding /Self Staining. This is a visual observation of colour transfer to another color or portion of the product, using the grey scale for evaluating staining to verify that customer requirement of 4.5 or better has been met. Observation results are the grey scale reading.

Raveled  edges. This is a visual observation for any evidence of ravelled edges after wash. Observation results are pass or fail.

Seam Pucker. Seam smoothness standard is compared to the product to verify that customer requirement has been met. This includes seam puckering on all split fronts , such as snap fronts, Zipper fronts and button front products. This appearance requirement is applicable. for all products evaluated using the CWIQ test, including raised fiber and washed garment treatments(enzyme washed ,stone washed, etc). Observation results are pass or fail .

Torque/ Skew. The side seam and AATCC 179-2001 inverted T methods are used to verify that customer requirement s have been met. Wovens-3% max. Garment Indigo Dyed Wovens-4% max. Woven swimwear- 4% max. Knits and sweaters-5% max. 100% cotton jacquard and garment dyed knits-7% max. Down filled -3% max .See for all products evaluated using CWIQ test including knits and sweaters. Observation results are pass or fail.

Excessive color change. This is a visual observation comparing the washed product to the unwashed product. Use the Gray scale for evaluating change in color to verify that customer requirement of 4 or better has been met. Observation results are the gray scale reading.

Excessive wrinkling. Overall smoothness appearance standard is compared to the product to verify that customer requirement has been met. This appearance requirement is applicable for all products evaluated using the CWIQ test, including sweaters. It has no relation to a product that may be labeled as wrinkle-free. Observation results are pass or fail.

Excessive Pilling. Pilling standard is compared to the product to verify that customer requirement has been met. This appearance requirement is applicable procedure below. Observation results are indicated in %. (one decimal place, ex.3.4% 2.4%)

Holes or other signs of excessive abrasion. This is a visual observation for any evidence of holes or other signs of excessive abrasion after wash .Observation results are pass or fail.

Zippers or other trims items functioning properly. This is a visual observation for any evidence of holes or other signs of excessive abrasion after wash. Observation results are pass or fail.

Hand feel. This is a physical inspection to determine whether if the hand feel is the same as before wash sample. Observation results are pass or fail.

Torque

Procedure for using side seam method

  1. After washing and drying, align the shoulder of a top or waist of a bottom. Lay flat and allow to condition for a minimum of 4 hrs. The product should be gently smoothed and free of large wrinkles or creases. Begin smoothing at the top of the garment and work down.
  2. Using a marker pen, one skewing mark should be placed at the uppermost point of the product folded edge- point E and the other skewing mark should be placed at the lower most point of the same folded edge-point G.
  3. Measure the distance from point F across to the nearest fold edge- point G.
  4. Calculate the percentage of torque after wash as follows:
  5. Line FG/Line EG* 100
  6. If torque is more than 3% then garment will fail the test.   
    Torque
    Torque

                                               

Skew

Procedure for using the AATCC test method 179-2001/ invented T method 2, Option 3

  1. After washing and drying, align the shoulder of a top or waist of a bottom. Lay flat and allow to condition for a minimum of 4 hrs. The product should be gently smoothed and free of large wrinkles or creases. Begin smoothing at the top of garment and work down.
  2. Using a marker pen, draw a reference line YZ across the width of the panel, above the bottom edge and hem. Draw a benchmark A perpendicular to end and in the middle of YZ. Draw benchmark B, both perpendicular to YZ and parallel to A.
  3. Draw a line from B to line YZ, following the grain line. Mark this intersection as C.
  4. Measure the distance from A to C. Measure the distance from A to B .
  5. Calculate the percentage of skewing after laundry clothing as follows: Line AC/ Line AB*100

Conclusion:

Skew is not measured with those garments that have a horizontal engineered stripe or wide horizontal stripes, over 3” in width. The horizontal stripe is the predominant element of the garment and the fabric must be cut and sewn with stripe on the horizontal. This is the procedure of laundry clothing which is described above.

Engr. Kh. Mashiur Rahman, Garments Auto Machine Technologist, Web: www.autogarment.com, Email: autogarments@gmail.com, Cell: +88 017 92 52 53 54

About Engr. Kh. Mashiur Rahman

He is Garment Automation Technologist and Editor in Chief of Autogarment. He is certified Echotech Garment CAD Professional-China, Aptech-India, NCC-UK and B.Sc. in CIS- London Metropolitan University, M.Sc. in ICT-UITS. He is working as a Successful Digital Marketer and Search Engine Specialist in RMG sector during 2005 to till now. Contact him- apparelsoftware@gmail.com

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