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US 4,321,087 AGranted
Process for making metallic leafing pigments
AssigneeRevlon, Inc.
InventorsSol Levine, Melvin E. Kamen, August DeFazio, Peter Cueli
Life of this patent
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Abstract
A continuous process for preparing finely divided thin, bright metal particles which comprises applying a release coating to at least one side of a carrier sheet, depositing a metal film of from 350 to 450 angstroms thickness onto the release coating solubilizing the release coating, removing the metal film from the carrier sheet, and breaking the thin metal film into particles having a diameter of between 25 to 50 microns.
Claims13
A continuous process for preparing finely divided metal particles comprising the steps of:
- (a) Applying a release coating onto at least one side of a continuous carrier sheet in an amount of from 0.75 to 1.50 lbs. of said release coating per ream per side of said carrier sheet,
- (b) depositing in the form of a thin film, a metal selected from the group consisting of aluminum, chromium, copper, steel, silver and gold, in an amount of from 350 to 450 angstroms thickness directly onto said release coating,
- (c) passing said carrier sheet with said release coating and said film of said metal through a solvent for solubiling said release coating but which is non-reactive with said metal,
- (d) removing said film of said metal from said carrier sheet in a particulate form to produce the metal particles substantially free of said release coating, and collecting the metal particles in a non-reactive solvent which is non-reactive with said metal.
- (e) concentrating the metal particles, and
- (f) breaking the metal particles into pigment particles having a particle size diameter between about 25 and 50 microns.
3 more elements
Dependencies are inferred from the claim text.