Hygroscopic nature Moisture content and humidity are of critical importance to commercial silk production. Figure 4 illustrates the pattern of moisture regain where a hysteresis exists between the adsorption and desorption curves. Desorption measures a greater regain at a given relative humidity. For instance, given 65 percent RH, the adsorption regain value is 10 percent and the associated desorption value is 11.1 percent. Effect of light Continuous exposure to light weakens silk faster than cotton or wool.
Raw silk is more resistant to light than degummed silk.
It is advised that silk drapery and upholstery fabrics be protected from direct exposure to the light. Electrical properties Silk is a poor conductor of electricity and accumulates a static charge from friction. This trait can render it difficult to handle in the manufacturing process. This static charge can be dissipated by high humidity or by maintaining a R.H. of 65 percent at 25 C. Based on its insulating properties, silk is used extensively for covering wire in electrical equipment. Action of water Silk is a highly absorbent fibre, which readily becomes impregnated with water.