Scope of Application

【Operating Instructions】

Used to rub colored fabrics (cotton, chemical fiber, blend, etc.) and leather against dry and wet white cotton cloth. The color change of the specimen and the staining of the white cotton cloth are evaluated using the grey scale, thereby determining the dry/wet rubbing fastness of the fabric.

Y571A Manual Crockmeter (Rubbing Color Fastness Tester)

Scope of Application

Used to rub colored fabrics (cotton, chemical fiber, blend, etc.) and leather against dry and wet white cotton cloth. The color change of the specimen and the staining of the white cotton cloth are evaluated using the grey scale, thereby determining the dry/wet rubbing fastness of the fabric.

Compliance Standards

• BS 1006 D02

• ISO 105 D02 X12

• AATCC 8 / 165

• GB/T 3920

• NEXT TM6

• M&S C8 / C8A

Technical Specifications

1. Finger Pressure: 9 N.

2. Finger Type: Rectangular finger for pile fabrics; Circular finger for other textiles.

3. Rubbing Cloth: Different standard white rubbing cloths are used for AATCC and ISO standards.

4. Finger Dimensions: Rectangular 19 × 25 mm or Circular Φ16 mm.

5. Rubbing Cloth Size: 50 × 50 mm for circular finger; 25 × 100 mm for rectangular finger.

6. Specimen Size: 50 × 140 mm.

7. Reciprocating Speed: Manual control.

8. Reciprocating Cycles: 1 - 99,999 times.

9. Stroke Length: GB: 100 mm; AATCC: 104 mm.

10. Dimensions: 660 × 160 × 220 mm.

11. Net Weight: 3.5 kg.

Accessories & Consumables

1. Rubbing cloth specimen holder.

2. Standard abrasive sandpaper.

3. Standard rubbing white cloth (AATCC/ISO standard).

4. Rubbing white cloth (SDC).

5. Calibration fabric.

6. Grey Scale (Staining) - ISO/BS standard.

7. Grey Scale (Staining) - AATCC standard.

Measurement Procedure

1. Conditioning: The specimen and standard rubbing white cloth must be conditioned in a constant temperature and humidity environment.

2. Coverage: When the specimen has multiple colors, ensure all colors are rubbed.

3. Sampling: If the area of each color is large enough, separate specimens should be taken.

4. Testing: Cut the specimen and perform dry and wet rubbing tests separately, ensuring all colors are rubbed.

5. Double-sided: If the front and back of the specimen are made of different materials or colors, both sides must be tested.

6. Non-repetition: Dry and wet rubbing tests should not be repeated on the same part of the specimen.

Dry Rubbing Procedure

1. Place the specimen flat on the abrasive paper on the tester, aligning the length direction with the stroke direction. Secure the specimen with the clamping plate, ensuring it is flat.

2. Fix the standard rubbing white cloth on the finger and clamp it with a spring clip. Gently place the finger onto the specimen.

3. Ensure the specimen does not slide or wrinkle during rubbing.

4. Place the finger on the specimen. Turn on the power and press the POWER key. Set the number of test cycles.

5. Press the START key to begin the test. The instrument will stop automatically when the set number of cycles is reached.

6. Remove the standard rubbing white cloth and evaluate the rating using the grey scale.

Wet Rubbing Procedure

1. Completely immerse the standard rubbing white cloth in distilled water.

2. Remove and squeeze between filter papers to achieve a specific moisture content.

3. The remaining steps are the same as the dry rubbing test procedure.

Result Processing

1. Before rating, gently use transparent tape to remove loose fibers from the rubbed white cloth.

2. Place three layers of unused rubbing white cloth under the tested cloth to be rated. Refer to the standard staining grey scale to evaluate the staining grade.

Measurement Report

1. Report the standard method used.

2. Report the dry and wet rubbing results separately.