รายละเอียดเอกสาร

This Standard covers the determination of the total luminous transmittance, in the visible region of the spectrum, of planar transparent and substantially colourless plastics, using a single-beam photometer with a specified CIE standard light source and photodetector. This Standard cannot be used for plastics which contain fluorescent materials. This Standard basically is applicable to transparent moulding materials, films and sheets not exceeding 10 mm in thickness.