Colourfastness to Perspiration test procedure

**This test is used to determine the fastness of coloured textiles to the effects of perspiration .

**It is applicable to dyed, printed or otherwise colored
textile fibers, yarns & fabrics of all kinds and to the testing of dyestuffs as applied to textiles.

Test Method: BS EN ISO 105 E04

Apparatus and Materials

** Perspirometer
** Balance with weighing accuracy of +/- 0.001 g
** Drying oven
** pH meter
** Volumetric flask
** Petridish
** Multifibre test fabric
** Gray scale for staining and colour change

Preparation of the samples

• the sample has to be tested in the delivered condition; don’t wash and/or tumble it before testing
• it has to be used only multifibre from James Heal, type DW
• the face side of the fabric/sample has to be tested
• one litre of the perspiration solution has to be prepared freshly
• the solution for the alkaline perspiration test has to be prepared with the salt
• Na2HPO4 2H2O di-sodium hydrogen orthophosphate dehydrate
• not with Na2HPO4 12H2O salt di-sodium hydrogen orthophosphate dodecahydrate
• the uniform penetration of the specimen has to be ensured by using liquor with a liquor ratio 50:1
for 30 min.
• The penetration of both parts (fabric and multifibre) has to be done in a flat bottomed Petri dish (A).
• After this process the specimen weight has to be 2x to 2,5x of the original weight
• the test equipment has to be heated up to 37°C at least 1 hour before testing
• even you test only one, two or three specimens you have to use at least 5 glass or acrylic resin
plates (F) (place them first) to ensure that the pressure (loading) will work on the specimen
correctly; the screws should be fixed perfectly to guarantee a permanent defined pressure
• it has to be ensured that the plates are even/ flat


Assessment of the specimens

• the assessment has to be done independently of 2 persons; as result take the average
• the assessment (G) has to be done with
• 1) defined grey scale
• 2) grey frame in same grey colour as background
• 3) white paper as background or according to the test method one or more original
multifibre to assure no transparent effect coming out of the background
• the edges of the specimen and original multifibre have to be cut straight
• under defined light D65 with defined angle of 45°
• compare the specimen multifibre with original multifibre as follows.

ISO Perspiration Solution Chemicals

perspiration solution

Apparatusperspirometer, oven

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