PAPERS WITH IMPROVED SCIENCE

摘要

The paper consists of a natural or synthetic fibrous matl. 0.05-5 wt % optical brightener (I) and 0.1-50 (1-20) wt % alkaline earth titanate (II). The paper has improved whiteness, e.g. a Q value 1. The fibres are esp. cellulose or polyester. (I) are e.g. derivs. of diaminostilbene disulphonic acid, (II) may have the formula MgxCa1-xTiO3 (where x = 0.001-0.999), specif. CaTiO3, MgTiO3, MgTiO4 or MgTi2O5.