Colourfastness to drycleaning Test procedure

***This test method is intended for determining the colourfastness of textiles to all drycleaning.
***A specimen of the textile in contact with the cotton fabric/multifibre and non corridible steel discs is agitated in perchloroethylene, then squeezed or centrifuged and then dried in air. Any change in colour of the specimen and coloration of solvent is then assessed with the standard Gray scale.

Test Method: BS EN ISO 105 D01

Equipment – Launderometer

drycleaning

Machine and Materials

** Laundrometer
** Non corridible steel discs, 30.0  2.0 mm diameter x 3.0  0.05 mm thickness, smooth and free from rough edges, weight 20.0  2.0 g.
** Undyed cotton twill cloth weighing 270  70 g/m2 cut into swatches 12 x 12 cm. Prepare a bag for each specimen with inside dimension 10 x 10 cm by sewing together two squares of this cloth around three sides.
** Perchloroethylene, commercial drycleaning grade.
** Multifibre test fabric or white cotton fabric
** Gray scale for colour change and staining

Test Parameters

** BS EN ISO
** No. of specimens – 1
** Specimen Size – 4 x 10 cm with no multifibre attached.
** Test Solution -Perchloroethylene
** Report – Colour Change of specimen solvent staining.

Procedure

** Place the specimen and 12 steel discs inside the bag. Close the bag by any convenient means.
** In a hood, place the bag containing the specimen and the steel discs in the standard 500 ml stainless steel container. Add 200 ml of perchloroethylene solution at 30  2°c.
** Close the container and agitate the specimen for 30 min at 30  2 °c in the laundrometer.
** Place the container in the adequately ventilated hood. Remove the bag from the container, withdraw the specimen and place the specimen between layers of absorbent paper or cloth to remove surplus solvent.
** Air dry the specimen in a hood at a temperature not exceeding 65°c
** Allow specimen to condition for evaluating.
** Color change of specimen – Prepare tested specimen for evaluation by trimming off raveled yarns and lightly brushing off any loose fibre and yarn on the fabric surfaces. Specimen should be smoothed or flattened if there are wrinkles. Evaluate the colour change using Gray scales.
** Solvent staining – the coloration of solvent is assessed by comparing the filtered solvent with unused solvent by transmitted light, by means of gray scale for assessing staining.

drycleaning process

 

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