초록 ▼

Lithographic printing substrates ordinarily require a mechanical or chemical graining of aluminum surfaces. Such substrates are difficult and expensive to make. It has been found that lithographically suitable substrates can be prepared by the firing of monobasic phosphate solutions with dispersed p

Lithographic printing substrates ordinarily require a mechanical or chemical graining of aluminum surfaces. Such substrates are difficult and expensive to make. It has been found that lithographically suitable substrates can be prepared by the firing of monobasic phosphate solutions with dispersed particles therein. The presence of reactive metallic oxides enhances the properties of the surface.

대표청구항 ▼

A photosensitive article comprising: A. an aluminum or aluminized substrate in the form of a film or sheet bearing on at least one aluminum or aluminized surface thereof a hydrophilic ceramic layer comprising (1) non-metallic inorganic particles and (2) a water-resistant phase, or phases, of a dehyd

A photosensitive article comprising: A. an aluminum or aluminized substrate in the form of a film or sheet bearing on at least one aluminum or aluminized surface thereof a hydrophilic ceramic layer comprising (1) non-metallic inorganic particles and (2) a water-resistant phase, or phases, of a dehydration product of at least one monobasic phosphate; said ceramic layer having a thickness between 0.2 and 15 micrometers and B. a photosensitive lithographic coating over said ceramic layer.