Felix Schoeller Jr Foto- Und Spezialpapiere Gmbh & Co. Kg

Felix Schoeller Jr. Papierfabriken Gmbh & Co. Kg

Felix Schoeller Jr. Foto- Und Specialpapiere Gmbh & Co. Kg

Hans-Ulrich Berner

Rolf Ebisch

Eckehard Saverin

Hans-Udo Tyrakowski

Udo Tyrakowski

A polyolefin-coated photographic base paper that has a shiny gold printing on the back side, prepared with a printing ink that contains an interference pigment and a water-soluble and/or a water-dispersible binder.

Photographic base paper with gold printing on back side

The invention relates to a photographic support material with a backlayer and to a coating composition for producing this backlayer. The layer is distinguished by excellent writing properties with pencils and is free of contaminations by aged developing baths. It is composed of carboxylated acrylate copolymer, organic polyacid, coarse-grained silica, thickener and, preferably, colloidal aluminium-modified silica.

Photographic support material with a backlayer containing coarse silica

A photographic support material has a reverse side layer which includes a polymer having a film formation temperature which does not exceed 70.degree. C., and a conductive material. The polymer may be a mixture of polymers or copolymers of styrene, alkylstyrene, (meth)acrylic acid and (meth)acrylic acid alkylester. The conductive material may be an alkali salt of a crosslinkable polysulfonic or polystyrene sulfonic acid or a coated or uncoated metal oxide from the group of metals of the 2nd to 4th main or sub groups, and may also contain a polyfunctional aziridin. The reverse side layer can be printed with thermal printers with only slight absorption of dirt and discoloration from developer baths, and has good adhesion of adhesive tape, good printability with conventional printers, good resistance to abrasion and baths, and a good antistatic properties.

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Hilter, Germany

Hans-Ulrich Berner