Abstract

Sunlight is an indispensable life source for all organisms in the Earth. These rays arrive to the earth between 280 - 3000 nm wavelengths. Although, small doses of UV rays are useful for life, they cause effects such as sunburn, allergies, early aging in the skin, skin cancer, bruise formations and cataract on human body as far as this dose increases. These harmful effects are more seen in light skinned people. In this study the literature information was given concerning the definition of ultraviolet radiation (UVR) which is harmful sunlight’s, the relation between UVR and textile materials, is the protection from ultraviolet rays through textiles and the development of ultraviolet protective properties of textiles. As an addition to this information, after applied optical bleach and dying process on 100% cotton basic weft knitting fabrics, 4% absorber chemical substance was applied to these fabrics. After applied different treatment processes to these fabrics of different construction and grams, the effect of construction and grams on UV permeability of basic weft knit fabrics and the effect of processes on UV permeability were searched experimentally, and the found values were examined by means of formed tables and graphics.

Key words: UVR, UPF, UV absorbent substance, weft knitting fabric.