läbipaistvuse pöördväärtus ... tavaliselt nimetatakse opaakseks nähtavat valguskiirgust peaaegu täielikult absorbeerivaid ja materjali sisemuses toimuva tugeva hajumise tõttu inimsilmale läbipaistmatuid materjale
Recital 8 of the provisional duty Regulation stated further that the product can be split into a variety of segments typically identified within the industry as magnetic, packaging, electrical, imaging and other industrial segments and that for the purposes of the investigation, the products were grouped in types according to market segment, thickness, coating properties, surface treatment, mechanical properties and clarity/opacity.