Erasmus+ 1 | Page 72

Worksheet B1

Hydrophoby

It is the material property not to create any bonds with water. The test of hydrophoby is made by dropping water on a horizontal surface and observing the reactions of the drop on the textile.

Task: Fill in the scale of drop reaction assessment, define the hydrophoby of area textiles and followingly compare the observed differences.

Tools: textile samples, a dropper, water, a bowl, cloth

Procedure:

1)Prepare a pot of water, a dropper and the samples

2)Fill in the names of the textile samples in the table

3)Fill the dropper with water and wipe carefully all rests of water on the surface of the dropper

4)Drop water carefully on each of the samples, from the height of approximately 1 cm from the sample

5)Observe the reactions on the samples for 30seconds and record the results in the table. Use this scale for the assessment:

6)Repeat the process for all other testing liquids.

7)Fill the results of you observation in the table.

Erasmus+ 72