Patent GB-1076698-A (GB)
Title: Improvements in or relating to printing
IPC: C09D11/02
Filed: 1963-12-17
Abstract: A method for printing thermoplastic resin articles comprises contacting an ink with a shaped article at the surface of the article to be printed at 60 DEG  C. to a temperature 20 DEG  C. higher than the softening point of the resin, the ink containing 5 to 50% by weight of a colorant which is soluble in a hydrocarbon, 10 to 50% of a liquid medium having an affinity to the resin and which is a liquid hydrocarbon and/or an animal or plant oil, fat or wax and which facilitates the diffusion of the colorant and 20 to 70% by weight of a protective film-forming substance which is capable of forming a dry film, and cooling down the printed article and then wiping off the printed surface with a solvent. The colorant may be any dye or pigment which is soluble in benzene.  The liquid medium may be lubricant oil, paraffin wax, liquid paraffin, grease, petroleum jelly, kerosene, mineral oil, heavy oil, liquid polyethylene or polypropylene, beef tallow, lard, whale oil, spermaceti, beeswax, soybean oil, rice bran oil, rosin oil or turpentine oil.  The film-former may be linseed oil, perilla oil, tung oil, hempseed oil, turpentine, copal, damar, phenol resin, alkyd resin, maleic resin, nitrocellulose, ethylcellulose, acetylcellulose, rubber chloride, polyvinyl chloride or polymethyl methacrylate.  Driers, e.g. lead oxide, manganese borate or cobalt, lead or manganese salts of organic acids, and solvents, e.g. acetone, ethyl acetate, benzene and petroleum fractions may also be present.  Examples are given of inks, including cold-set inks, for screen printing, gravure printing, offset printing photogravure or aniline relief printing of polyethylene, polypropylene, polyvinyl chloride, polystyrene, polymethylmethacrylate, nylon 66, and polyacetal resin.ALSO:An ink for printing thermoplastic resin articles comprises 5 to 50% by weight of a colorant which is soluble in a hydrocarbon, 10 to 50% of a liquid medium having an affinity to the resin and which is a liquid hydrocarbon and/or an animal or plant oil, fat or wax and which facilitates the diffusion of the colorant and 20 to 70% by weight of a protective filmforming substance which is capable of forming a dry film.  The colorant may be any dye or pigment which is soluble in benzene.  The liquid medium may be lubricant oil, paraffin wax, liquid paraffin, grease, petroleum jelly, kerosene, mineral oil, heavy oil, liquid polyethylene or polypropylene, beef tallow, lard, whale oil, spermaceti, beeswax, soybean oil, rice bran oil, rosin oil or turpentine oil.  The film-former may be linseed oil, perilla oil, tung oil, hempseed oil, turpentine, copal, damar, phenol resin, alkyd resin, maleic resin, nitrocellulose, ethylcellulose, acetylcellulose, rubber chloride, polyvinyl chloride or polymethyl methacrylate. Driers e.g. lead oxide, manganese borate or cobalt, lead or manganese salts or organic acids, and solvents e.g. acetone, ethyl acetate, benzene and petroleum fractions may also be present.  One example describes an ink comprising a red dye, petroleum jelly, ethyl acetate, and a vinyl varnish containing vinyl chloride resin, cyclohexanone, methyloxide, xylene and dioctyl phthalate.