parts by weight per 100 parts of mica, has a particle size greater than colloidal and substantially greater than the thickness of the mica flakes, is capable of flowing under temperatures below the melting point of mica so as to surround the mica and bond the flakes, and may be shellac. ...
The fibres may be crystalline or amorphous, oriented or unoriented, of polyethylene terephthalate, of copolyester prepared from terephthalic acid, isophthalic acid and ethylene glycol, of polyaryl sulphones, polycarbonates, cellulose derivatives, shellac or glass. Fibrids if used may be of polyesters,...
The second coating may be applied as a complete coating over both coloured and uncoloured portions and a final protective coating of e.g., shellac or plaster may be applied.