Exposure rack for coated fabric
Various types of materials whether it is coated fabrics, or a polyvinyl chloride sheeting or insulation and sheath of cable experience change in colour when exposed to daylight for sufficient period because of the action of daylight on pigments used. The severity of exposure in both time and intensity of daylight determines the extent of the change in colour. The colorfastness is denoted by the number of the dyed wool standard (provided by British Standards Institute) that has changed colour to the same extent as the test specimen. It is expressed in the numerical rating for light fastness.
The Exposure Rack consists of an open bottomed wooden box fitted with a removable wooden frame carrying a wire screen, a wooden removable rack for supporting test pieces / wool standards and a hinged lid made of aluminium angle frame with Acrylic sheet fixed on the same. The box is fitted on a stand to keep the case in open with 45º inclination to the horizontal.
IS 1259 - 1984 : Specification for Vinyl Coated Fabrics
IS 2076 - 1981 : Specification for Unsupported Flexible Polyvinyl Chloride Sheeting
IS 9766 -1981 : Specification for Flexible PVC Compounds
IS 10810 : Methods of Test for Cables(Part 18) - 1984