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
