Abstract: A printer ink composition containing a triphenylmethane dye or a lake pigment derived therefrom as a coloring agent, including as the coloring agent a triphenylmethane dye having general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently hydrogen atom, an alkyl group, an aralkyl group or an aryl group, R.sup.5 is an aryl group, X.sup.- is a counter ion, and ring A or ring B may be substituted by one or more substituents, provided that at least one group among R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is not methyl and in the case that R.sup.5 is p-dimethylaminophenyl, at least one of R.sup.1 and R.sup.2 and at least one of R.sup.3 and R.sup.4 are not methyl; or a lake pigment derived therefrom, in order to prevent the formation of Michler's ketone. The ink composition is used for printing media for printer such as fabric ink ribbon, ink roll, ink-retaining element, thermal transfer ink ribbon, and pressure-sensitive transfer ink ribbon.

Abstract: A multi-gradation heat sensitive transfer medium for use in multi-gradation thermal transfer for adjusting the density of a transfer print image by superimposing ink layers on a recording medium a plurality of times by thermal transfer, which comprises a foundation and ink layers provided thereon, each of said ink layers containing a color pigment having a high transparency and a high tinting strength in an amount smaller than sufficient to provide a maximal degree of reflection density, and each of said ink layers having a light transmittance of not less than about 65% in a region where the color pigment does not have any absorption band. By superimposing the ink layers of the transfer medium on a recording medium a plurality of times, there is obtained a clear print image having a multiplicity of gradations.

Abstract: A reusable heat-sensitive transfer recording element which comprises a foundation and an ink-containing layer provided on the foundation, said ink-containing layer comprising porous particles impregnated with a heat-meltable ink and a binder material for bonding the particles to each other, said binder material being substantially incompatible with the heat-meltable ink. With the present transfer elements, printed images having a high optical density can be obtained from the initial use thereof and printed images having such high optical density can be obtained at every repeated use.

Abstract: A heat-sensitive color transfer recording media which comprises a continuous foundation comprising an electroresistive layer and an electrically conductive layer; and a multiplicity of coated areas of heat-sensitive transfer inks applied onto the foundation; the multiplicity of the coated areas being disposed on the continuous foundation side by side so as to traverse continuous foundation; the multiplicity of the coated areas being arranged sequentially in the longitudinal direction of the continuous foundation in a repeating unit which comprises a plurality of different color coated areas; each of the different color coated areas included in the repeating unit having a length in the longitudinal direction of the continuous foundation substantially equal to the length or width of a receiving medium; each of the heat-sensitive transfer ink layers of the coated areas being a transparent ink layer comprising a transparent coloring agent and a transparent hot-melt vehicle; and said plurality of the different col

Abstract: Heat-sensitive magnetic transfer element for printing magnetic image to be recognized by magnetic ink character reader (MICR), which comprises a heat-resisting foundation and a heat-sensitive transferring layer provided on the foundation, said transferring layer having a melting temperature of 50.degree. to 120.degree. C. and comprising 30 to 97% by weight of a ferromagnetic substance powder, 2 to 69% by weight of a wax and 1 to 68% by weight of a resin. The transfer element gives a printed magnetic image having high accuracy of dimensions and high magnetic properties by thermal printing method.

Abstract: Heat-sensitive color transfer ribbon comprising a foundation having at least three nonoverlapped heat-sensitive transfer ink layers of yellow, magenta and cyan colors on one side thereof and designed for use in thermal color recording system in which the ribbon transfers respective color ink layers to a copy sheet in response to respective color signals given to a thermal recording machine. The transfer ink layers of yellow, magenta and cyan colors contain respective transparent or semitransparent color agents, and a multi-color image closely resembling a color original is prepared on the copy sheet by overlap of colors.

Abstract: A heat-sensitive color transfer recording media comprising a continuous foundation and a multiplicity of coated areas of heat-sensitive transfer inks applied onto the foundation; the multiplicity of the coated areas being disposed on the continuous foundation side by side so as to traverse the continuous foundation; the multiplicity of the coated areas being arranged sequentially in the longitudinal direction of the continuous foundation in a repeating unit which comprises a plurality of different color coated areas; each of the different color coated areas included in the repeating unit having a length in the longitudinal direction of the continuous foundation substantially equal to the length or width of a copy sheet; each of the heat sensitive transfer ink layers of the coated areas being a transparent ink layer comprising a transparent coloring agent and a transparent hot-melt vehicle; and said plurality of the different color heat-sensitive transfer ink layers of the coated areas of the recording media b

Abstract: A heat transfer recording medium which comprises tissue paper having thereon an ink layer comprised of material fluidizable or sublimatable upon the application of heat. The tissue paper has a thickness of 5 to 25 .mu.m, a density of 0.8 to 1.45 g/cm.sup.3, a smoothness of 200 to 20,000 seconds (determined by the Oken type measurement) and a water content adjusted to 6 to 13 wt % after forming the ink layer thereon. The medium does not generate puckers when employed in a transfer type heat sensitive recording apparatus under high temperature and humidity conditions.

Abstract: Heat-sensitive magnetic transfer element for printing a magnetic image to be recognized by a magnetic ink character reader (MICR), comprising a heat-resisting foundation and a heat-sensitive transferring layer provided on the foundation, the transferring layer which includes a ferromagnetic substance powder and has a melting point of 50.degree. to 120.degree. C. being readily melted and transferred on a receiving paper in the form of magnetic image by a thermal printer.