Determination of colour fastness to water – Textile Materials

colour fastness to water 

EQUIPMENT                                     

•  Perspirometer

                                                                    

TOOLS/ACCESSORIES                  

1. Stainless-mass 50 N
2. Acrylic resin plate base-11.5X6cm and – Thickness 0.15cm
3. Oven temperature (37±2^oC)
4. Two adjacent fabrics or multi fabrics  – (each 10X4cm)
5.  Grey scale

REAGENTS 

•  Distilled water

                                                                    

NO. OF SAMPLE  

more than one (place the sample 10X4cm between the two Adjacent fabrics or multifibre and sew along one of the Shorter Side to form a composite specimen)

                                                                       

PEOCEDURE  

1. Condition the sample to moisture equilibrium in standard atmosphere temperature 27±2^oC and HR 65± 2 %.for 24 hour.

2. Thoroughly wet the sample in distilled water.

3. Allow it to remain in the solution at room temperature.

4. Pour off the water; place the composite specimen between two acrylic resin plates (11.5X6cm) under force 50 N.

5. Keep testing device in oven for 4 hour at 37± 2^oC.

6. Open out the composite specimen by breaking the stitching on all side except one of the shorter side.

7. Dry by hanging it in air (not exceeding 60^oC.)

8. Assess the change in colure of the test specimen by the method prescribed in IS 

       789-1982.

9. The degree of staining of the two pieces of adjacent fabrics by the method in IS 769-1982

   

Note: If sample is multicolor fabrics- minimum one sample for each colour