Place the sample over an ironing board and iron it with hot iron (about 200° F.). Compare the sample immediately with one not ironed. Remember that many colors, particularly colored silks, change while they are hot. If the original shade returns when the fabric has cooled, then the fabric is fast to ironing and pressing.
Questions
1. What is the object of ironing and pressing clothes?
2. Is it a good plan to press clothes often?
3. Is there any difference in the effect of the hot iron on the three kinds of fabrics?
Experiment 50—Test of Fabric to Withstand Perspiration
Apparatus: Porcelain dish.
Materials: Silk, cotton, and woolen fabrics.
Reference: Textiles, page [243].
Directions
1. In addition to withstanding the action of coming in contact with the human skin, fabrics like hosiery, etc., should withstand the excretions of the body.
2. To test a fabric for resistance, place the sample in a bath of dilute acid made by adding one teaspoonful of acetic acid to a quart of water warmed to the temperature of the body, 98.6° F. The fabric should be dipped a number of times, and then dried, without rinsing, between parchment paper.