摘要:
A thermally sensitive recording medium which comprises, on a substrate, a thermally sensitive colour developing layer comprising a colourless or a pale coloured dye precursor and a colour developer, and which gives a developed image having a colour difference a* value regulated by JIS-Z-8729 of 0 - 40 and a colour difference b* value regulated by JIS-Z-8729 of 0 - 55.
摘要:
A marking composition comprising an energetic ray curing resin which gives a vivid coloration on laser beam irradiation, a leuco dye which is lowly soluble in toluene, and a color developer; and a method of laser marking for importing a vivid mark by using the composition.
摘要:
By using the fluoran compound represented by the following general formula (I); wherein R 1 is alkyl containing 1 to 4 carbon atoms, R 3 is alkyl containing 1 to 8 carbon atoms, R 4 is hydrogen or alkyl containing 1 to 8 carbon atoms, or R 3 and R 4 may bond with each other to form a ring together with a N atom, R 2 is alkyl containing 1 to 4 carbon atoms, and n denotes 0, 1 or 2, however, the substituents represented by R 2 may be different with each other when n is 2, as a color former for color forming recording materials, recording materials which have excellent properties in whiteness of the background of the material under light and in photostability of color-formed images on the materials as well as in sufficient color forming capability of the material even after having exposed them to light, can be provided.
摘要:
A heat-sensitive recording material comprising a support and a heat-sensitive recording layer containing a leuco dye and a developer, formed on one side of the support, wherein the heat-sensitive recording layer contains an ultraviolet ray-absorbing agent, said ultraviolet ray-absorbing agent being a dimer ultraviolet ray-absorbing agent.
摘要:
There are provided a thermochromic opaque composition capable of exhibiting change in transparency together with change in color in response to temperature variation, a laminate member employing the same, and a three-dimensional article capable of concealing and revealing the interior, utilizing the laminate member. The thermochromic opaque composition is formed by dispersing a thermochromic material, capable of developing and erasing color by an electron donating-accepting reaction, in small particles in vinyl chloride-vinyl acetate matrix resin. The above-mentioned structure realizes reversible change in transparency, together with change in color, in response to temperature variation, with hysteresis with a temperature difference of 10°C at minimum to 50°C between the high and low trigger temperatures.