the waxes presently used for this purpose are those which mainly contain natural wax such as carnauba or montan wax, or a modification thereof.It is not too much to say that the selection of an excellent single wax or an excellent combination of waxes is the key to production of an excellent ink for carbon paper. the wax facilitates the mutual dispersion and combination of the other components, enables the ink to be applied to a paper substrate, prevents the base oil from blurring out to the back side of the paper substrate and also the base oil from transferring to other paper overlapped on the paper substrate for duplication, facilitates color development of the dyestuff and provides the ink applied to the paper substrate with gloss and smoothness to this end, the wax may be used as the most important component in an amount of 20-60% by weight of the ink.inks for carbon paper comprise a base oil, wax and carbon black, as well as a dyestuff such as indigo or methyl violet, a filler such as powdered clay, a resin and the like as required.the novel waxes according to this invention have excellent hardness, gloss, color tone and heat stability without any odor when they are incorporated with the base oil, the resulting mixture will have excellent hardness, excellent gloss, satisfactory color tone, low viscosity and high oil retainability as well as excellent capability of dispersing carbon black, and excellent capability of dispersing dyestuffs and promoting color display thereof.More particularly it relates to such an ink composition comprising a base oil, wax, carbon black and other necessary ingredients such as dyestuff and filler, the wax being such that at least a part thereof is a novel one having various excellent properties. This invention relates to a novel ink composition for carbon paper.B41M5/10- Duplicating or marking methods Sheet materials for use therein by using carbon paper or the like.B41M5/00- Duplicating or marking methods Sheet materials for use therein. B41M- PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES COLOUR PRINTING.B41- PRINTING LINING MACHINES TYPEWRITERS STAMPS.C09D11/12- Printing inks based on waxes or bitumen.PAINTS, VARNISHES OR LACQUERS FILLING PASTES CHEMICAL PAINT OR INK REMOVERS INKS CORRECTING FLUIDS WOODSTAINS PASTES OR SOLIDS FOR COLOURING OR PRINTING USE OF MATERIALS THEREFOR C09- DYES PAINTS POLISHES NATURAL RESINS ADHESIVES COMPOSITIONS NOT OTHERWISE PROVIDED FOR APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Nippon Oil Corp filed Critical Nippon Oil Corp Application granted granted Critical Publication of US4218252A publication Critical patent/US4218252A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Nippon Oil Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US05/919,638 Inventor Nobuo Yokoyama Current Assignee (The listed assignees may be inaccurate. Google Patents Ink compositions for carbon paperÄownload PDF Info Publication number US4218252A US4218252A US05/919,638 US91963878A US4218252A US 4218252 A US4218252 A US 4218252A US 91963878 A US91963878 A US 91963878A US 4218252 A US4218252 A US 4218252A Authority US United States Prior art keywords wax carbon paper ink composition final waxes Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4218252A - Ink compositions for carbon paper US4218252A - Ink compositions for carbon paper
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