Determination of Colour Fastness to Rubbing – Textile Material

 

Colour Fastness of Textile to Rubbing

APPARATUS 

• Crock Meter
• Grey scale

 

TOOLS/ACCESSORIES                       

a) Rubbing finger

• Diameter-3.2 cm
• Flat area-2.5 cm
• Circular transition radius -0.32 cm

 b) Rubbing cotton cloth

• Cut in squares- 5X5cm

NO. OF TEST PIECES                       

 4 (Each not less than 14X 5 cm)

• Cut the sample in warp ways -2(1 for dry & 1 for wet rubbing) and
• Cut the sample in Weft ways-2 (1 for dry & 1 for wet rubbing)

PEOCEDURE 

• Fix the sample in rubbing device by using clamps.
•  Rubbing it to and fro in straight line along a track 10 cm long on the dry specimen 10 times to and fro in 10 seconds with downward force 22N ( for pile fabrics, including floor covering ) or 9N (for all other textiles).  
•  For wet rubbing, wet the rubbing cloth with water (if cloth is 1 g means, wet up to 2g )
•  After rubbing ,dry the cloth at room temperature
•  Assess the staining of rubbing cotton clothes with Grey scale.

REFFERENCE SPECIFICATION     : IS 766-1988