Color Fastness to Saliva Test

Determine the resistance of the colour of textiles regarding influence of saliva. This test must be done for fabrics used for baby / infant garments only.

Apparatus required:

Filter paper

Stick tape

Distilled water

Desiccator with water

Drying cabinet with a constant temperature of 40°C +/- 2°C.

Solution 1 and 2

Solution 1:

4.2 g/l Sodium hydrogen carbonate

0.5 g/l Sodium chloride

0.2 g/l Potassium carbonate

Solution 2:

4.5 g/l Sodium chloride

0.3 g/l Potassium chloride

0.3 g/l Sodium sulphate

0.4 g/l Ammonium chloride

3.0 g/l DL-Lactic acid (~90%)

0.2 g/l Urea

Procedure:

Desiccator filled with water (app. 5cm) preheated at 40 degree

Cut one sample of 90 x 120 mm out of the testing fabric

Cut two stripes 15 x 80 mm of filter paper

Dip one of the filter paper in solution 1 and the other in solution 2

Put the soaked stripes of filter paper on the tested fabric with a distance of 10 mm between both filter papers

Put the stick tape over the testing sample with filter paper

Put the prepared sample for 2 hours at 40 degree into the desiccator

Evaluation:

After carry out the time, take off the filter paper from test fabric and evaluate the colour staining.

Fast to saliva = No colour staining

Non fast to saliva = colour staining

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Color Fastness to Saliva Test

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