Bayer Aktiengesellschaft

Siegfried Keifer

Hans Rudolph

Hans J Rosenkranz

Hermann Perrey

Jakob Rademachers

Wilfried Burow

Volker Wilhelm

Birger Knickel

Hans G Volz

Reinhold Rudisch

Thermostable pigments for coloring stoving lacquers, coil coat lacquers, plastics, sand granulates, lime sandstone, enamel or ceramic glazes are zinc ferrite color pigments containing from 0.01 to 0.5% by weight of lithium.

Thermostable zinc ferrite color pigments containing 0.05-0.5 wt %

An air pore lacquer comprising a solvent, a binder and at least one additive which is a white pigment or white filler, the additive having an average particle size D.sub.zv which is at least about 10% smaller than the optimum average particle size for the same binder free from air pores. When the additives are pigments they are preferably 20 to 50% smaller, and when they are fillers preferably 20 to 80% smaller, than the optimum particle size for the air pore-free binder. Rutile and anatase TiO.sub.2 are preferred.

Air pore lacquers containing white pigments or white fillers

Chromium oxide pigments intimately admixed with an alkoxylated alkyl sulphonamide to obtain a pigment having a low degree of flocculation.

Modified chromium oxide pigment

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Krefeld, Germany

Siegfried Keifer