chloric acid as a sole acid, and subsequent ly rinsing the mate- rial.

MULTILAYER COATING U.S. Patent 5,840,372. Nov. 24, 1998 H.P. Rink et al., assignors to BASF Lacke + Farben AG, Muenster- Hiltrup, Germany

A process for the preparation of a multi layer coating on a substrate surface compris ing applying a p i g m e n t e d a q u e o u s ba secoa t , which comprises a polyacrylate resin and a crosslinking agent; forming a polymer film from the basecoat; applying a t ransparent topcoat to the resulting basecoat; and subsequently baking together the basecoat and topcoat, wherein the basecoat contains an alumi- num pigment.

AGUEOUS COATING FOR CANS U.S. Patent 5,840,384. Nov. 24, 1998 S. Noda et al., assignors to Kansai Paint Co. Ltd., Japan

An aqueous composition for coat- ing the exterior surface of a can, comprising a water-soluble or wa- ter-dispersible reaction product prepared from 50 to 90 parts by weight of at least one resin having carboxyl funct ional i ty selected from acrylic resin and polyester resin; 10 to 50 parts by weight of epoxy resin; and a ter t iary amine.

WATER-THINNABLE COATING COMPOSIT IONS U.S. Patent 5,840,799. Nov. 24, 1998 B. Mayer et al., assignors to BASF Lacke + Farben AG, Muenster- Hiltrup, Germany

A mixer system for the production

of water-thinnable coating compo- sitions having precisely defined color shades.

POLYESTER COATINGS U.S. Patent 5,840,827. Nov. 24, 1998 J.J. Zupancic et al., assignors to Morton International Inc., Chicago

Low molecular weight hydroxy- functional polyesters for coatings.

STAINLESS STEEL PICKLING WITHOUT NITRIC ACID U.S. Patent 5,843,240. Dec. 1, 1998 C. Pedrazzini and P. Giordani, assignors to Novamax ITB S.r.L., Milano, Italy

A pickling and passivation pro- cess for chromium conta in ing stainless steel comprising placing the material in a bath kept at 30 to 70°C having the following opti-

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