Particles of polyethylene, polypropylene, polyacrylic lower alkyl esters, and polymethacrylic lower alkyl esters are pigmented by progressively mixing the dry particles with dry pigment in a high-speed mixer having a blade tip speed exceeding about 200 inches per second for a short period of a few minutes or less, whereby all of the pigment becomes firmly adhered to the surfaces of the polymer particles.

A method of pigmenting certain parts and products of poultry, fish and crustacea by including in the feed of the pertinent animal one or more of the carotenoids 2'-dehydroplectaniaxanthin, desmethylspheroidenone, spheroidenone, 1-hydroxy-3,4-didehydro-1,2-dihydro-.psi.,.psi.-caroten-2-one, 5'-hydroxy-5',6'-dihydro-4'-apo-.beta.-caroten-6'-one, 1'-hydroxy-3',4'-didehydro-1',2'-dihydro-.beta.,.psi.-carotene-4,2'-dione and 5'-hydroxy-5',6'-dihydro-4'-apo-.beta.-carotene-4,6'-dione, poultry, fish an...

There is provided an improved polypropylene/pigment concentrate for use in preparing pigmented fibers. The improvement comprises at least 95 weight percent of the polypropylene particles have a maximum chord of less than 50 microns. Fibers prepared from concentrates containing 10-75% by weight of pigment have improved color, fewer pigment agglomerates and fewer broken filaments.

A method of pigmenting certain parts and products of poultry, fish and crustacea by including in the feed of the pertinent animal one or more of the carotenoids 2'-dehydroplectaniaxanthin, desmethylspheroidenone, spheroidenone, 1-hydroxy-3,4-didehydro-1,2-dihydro-.psi.,.psi.-caroten-2-one, 5'-hydroxy-5',6'-dihydro-4'-apo-.beta.-caroten-6'-one, 1'-hydroxy-3',4'-didehydro-1',2'-dihydro-.beta.,.psi.-carotene-4,2'-dione and 5'-hydroxy-5',6'-dihydro-4'-apo-.beta.-carotene-4,6'-dione, poultry, fish an...

A method of producing pigmented extrudates or mouldings from an unpigmented thermosetting moulding material, which comprises roughly blending a pigment component with an aminoplast moulding material substantially free from pigment and having an average particle size not greater than 150 microns, and completely dispersing the pigment compound through the aminoplast moulding material by progressing the rough blend through an extruder or injection moulding machine having a barrel grooved in accorda...

A method for altering iris pigmentation in a human, thereby altering perceived iris color of a first iris from a first iris color to a second iris color. The method comprises preselecting one or more than one laser capable of generating one or more than one laser beam which will selectively remove iris pigment of a first preselected pigment color from the first iris, and applying the one or more than one laser beam to the first iris of a first iris color to remove iris pigment of the first prese...

A process for the conversion of crude metal phthalocyanines produced by fusion syntheses into pigments having improved tinctorial strength and transparency is described. The process involves mixing the dry crude metal phthalocyanine with 2 to 5 parts of 82 to 86% sulfuric acid per part of pigment in the crude in the absence of shear to form a paste-like mass and then hydrolyzing the mass under certain conditions using a hot aqueous diluent containing 2 to 15% by weight of pigment in the crude of...

A composition comprising a carrier and prostaglandin effective in stimulating synthesis of melanin in a human melanocyte thereby enhancing pigmentation of the human skin and optionally comprising a lysosomotropic agent, a phosphodiesterase inhibitor, and/or methylxanthines, and a method of use of the composition. Use of this composition promotes tanning of the human skin and increases photoprotection from ultraviolet radiation.

A composition and method for treating disorders related to tyrosinase gene expression and melanin biosynthesis is disclosed. The composition comprises a tyrosinase encoding nucleotide sequence and an ORF-438 encoding nucleotide sequence derived from Streptomyces, adapted for expression in mammalian cells. Also disclosed is a model system for evaluating agents that affect pigmentation.

This invention relates to methods and compositions for bringing about changes in skin pigmentation. More particularly, this invention relates to compounds which affect melanogenesis and can be used as depigmenting agents or as agents for darkening skin utilizing the PAR-2 pathway.