Determination of Colour Fastness of Perspiration – Textile Material

Colour Fastness of  Perspiration- Perspirometer

Colour Fastness of  Perspiration 


  • Perspirometer


gray scale



  • Stainless-mass 5 Kg
  •  Acrylic resin plate base-11.5X6 cm and 
  • Thickness 0.15cm
  • Oven temperature (37±22°C)
  • Two adjacent fabrics or multi fabrics  (each 10X4 cm)
  • Grey scale.


Alkaline solution:

  • 0.5g of 1-histidine monohydrochloride Monohydrate + 5 g of NaCl + 5 g of Na2 HPO4.12H2O in 1000ml distilled water. PH-8 (adjust with 0.1N NaOH ).

Acid solution:

  • 0.5g of 1-histidine monohydrochloride Monohydrate + 5 g of NaCl + 5 g of Na2 H2PO4.2H2O in 1000ml distilled water. PH-5.5 (adjust with 0.1N CH3COOH ).


NO. OF SAMPLE                             
More than one

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


4 (2 for Alkaline solution &2 for Acid solution)


  • Condition the sample to moisture equilibrium in standard atmosphere temperature 27±22°C and HR 65± 2 %.for 24 hour.
  • Wet the sample thoroughly in alkaline solution at liquor ratio (50:1).
  • Allow it to remain in the solution at room temperature for 30 min.
  • Press and move it time to time to ensure good and uniform penetration of the liquor.
  • Pour of the solution and wipe the excess liquor off the sample between two glass rods.
  • Then place the composite specimen between two acrylic resin plates (11.5X6cm) under pressure 12.5K pa.
  • Keep testing device in oven for 4 hour at 37± 22°C.
  • Open out the composite specimen by breaking the stitching on all side except one of the shorter side.
  • Dry by hanging it in air (not exceeding 602°C.)
  • Treat the second composite specimen similarly as in follow above procedure using acidic solution instead of alkaline solution.
  • Repeat the test with other composite specimens taken from the other test pieces.
  • Evaluate the change in colure of the treated test specimen by the method prescribed in IS 789-1982.
  • The degree of staining of the two pieces of adjacent fabrics by the method in IS 769-1982



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