Dear Musaab,

As you are aware, in normal use, the crockmeter rub fastness test generates a smear on white cotton that is rated by reference to standardised greyscale patches. In principle it is clearly possible to invert this model and use it to quantify colour removal.

However, the technology of textile coloration with dyes and pigments fortunately offers a better method based spectral reflectance measurement. In the relevant colorant recipe prediction method the so called Kubelka Munk function is used to relate added dye concentration C, linearly, to decimal percent reflectance R. It follows that the amount of colorant added (or indeed abraded away) may be quantified using spectral (or narrow band filter) reflectance measurements.

Dear M.Mussab,

The resistance of textile materials to abrasion as measured on a testing machine in the laboratory can be followed by couple of ASTM and ISO standard given below . Abrasion occurs during wearing, using, cleaning or washing process and this may distort the fabric, cause fibres or yarns to be pulled out or remove fibre ends from the surface. Abrasion ultimately results in the loss of performance characteristics, such as strength, but it also affects the appearance of the fabric. The main factors that reduce service life of the garment are heavily dependent on its end use. But especially certain parts of apparel, such as collar, cuffs and pockets, are subjected to serious wear in use.

Most abrasion tests depend on applying energy to the fabrics and measuring their response to it. The manner of transferring the energy from machine to the fabric is different for different machines, but the basic principles are the same. ASTM and ISO define several methods to quantify abrasion resistance of textile materials and introduce methods for the evaluation of abraded fabrics.

1. ASTM D 4966 - Standard Test Method for Abrasion Resistance of Textile Fabrics - Martindale Abrasion Tester

2. ASTM D 3884 - Test Method for Abrasion Resistance of Textile Fabrics - Rotary Platform DoubleHead (RPDH)

3.ISO- 19427-I,2,3,4- Determination of the abrasion resistance of fabrics by the Martindale method Part 1: Martindale abrasion testing apparatus - Martindale Abrasion Tester

A specimen is mounted in a holder and abraded uniformly in all directions in the plane and about every point of the surface of the specimen. The Uniform Abrasion Tester, consists of the abradant mounted at the lower end of a shaft, weights placed on the upper end of the shaft to produce constant pressure between abradant and specimen throughout the test, lever and cam for raising and lowering the abradant, shaft, and weights. Essentially, the surface of the abradant lies in a plane parallel to the surface supporting the specimen and presses upon the specimen. The abradant and specimen rotate in the same direction at very nearly but not quite the same angular velocity (250 rpm) on noncoaxial axes which are parallel to within 0.0025 mm (0.0001 in.). The small difference in speed is to permit each part of the specimen to come in contact with a different part of the abradant at each rotation. Each rotation is equivalent to one cycle (ASTM D 4158).

Evaluation methods of abrasion tests can be done by series of experiments conducted abrasion cycles for determination of weight loss. There are various measurement methods to measure abrasion properties of yarns, including yarn on yarn abrasion and yarn external abrasion, which comprises different test procedures.

Just refer this site for further study.

https://pdfs.semanticscholar.org/268c/42c137809d117917053f65a26d4b481104f6.pdf

Hope it work out for you.

Ashish