The resistance of the color of the printed or dyed textile products against the effect of saliva solution is called saliva fastness. As a result, the dyes on all textile products are expected to be resistant to various external factors, not to release itself and not to dye materials adjacent to their mediums.

When performing saliva fastness tests in textile products, two filter paper 15 x 80 millimeters are wetted separately in two different saliva solutions. These papers are then deposited onto the piece of fabric to be tested and covered. The oven is then heated in a 400 heated oven for two hours. At the end of the test, the papers should not be stained. If the paint is stained on the paper, the fastness of the saliva is bad. On the contrary, if there is no stain on the paper, the fastness of the saliva is good.

The coloration on paper is evaluated by the gray scale used in the fading assessment (TS 423-2 EN 20105-A02 Textile - Methods for determining color fastness - Section A02 - Using the gray scale for the evaluation of fading).

Saliva fastness tests performed by authorized laboratories comply with the following standards:

• DIN 53160-1 Determination of color fastness of articles for common use - Part 1: Test with artificial saliva
• BVL B 82.10-1 Analysis of goods - Tests of colored children's toys for saliva and perspiration resistance

This test method was prepared to evaluate the color resistance of textile products against saliva solution. Although textile companies generally perform such fastness tests in their own laboratories, it is true that all fastness assessments, as well as saliva fastness assessments, are performed in accredited laboratories. These laboratories have a strong technological infrastructure and a trained and experienced staff in order to ensure that the evaluations to be performed provide high quality, fast and reliable results.