With these variables, the infrared radiation source can direct infrared radiation to the color forming composition in accordance with data received from a signal processor. As used herein, “protonic acid” refers to an acid which ionizes in aqueous solution to liberate hydrogen ions. Our laser rays absorbing colorant is excellent colorant, unlike to other conventional colorants, which we can confirm the laser welding by visual as it becomes colorless state after laser irradiation. Heat was then applied using a laser at about 45 mW power for about 100 microseconds. Especially, our dyes in this line are suitable for application to thermal transfer ink ribbons to create full color image having excellent concentration gradation properties of the developed color and light fastness. | 5★ 0000002027 00000 n The protected activators of the present invention comprise an activator having at least one acid group and a protection leaving group chemically attached to the at least one acid group. Typically, the graphic display is found prominently on one side of the optical disk, though this is not always the case. For this purpose, our dyes have been applying. acetonitrile or dioxane, followed by an aqueous work up (addition of water and subsequent extraction of the protected activator using ether or the like) or evaporation and purification. Nos. Coating compositions can be spin-coatable in one embodiment, or can be configured for other application methods as well e.g. 0000000743 00000 n ★★★★★4.0 out of 5 VotesRated by 12 Buyers Leuco Dye products can be found in wide variety of forms. 4.0/5 However, if the color forming composition and absorber are placed in separate layers, proximity can be considered. Examples of optical disk formats include writeable, recordable, and rewriteable disks such as DVD, DVD-R, DVD-RW, DVD+R, DVD+RW, DVD-RAM, CD, CD-ROM, CD-R, CD-RW, and the like. The resulting data is delivered to an infrared radiation source which exposes portions of the color forming composition to infrared radiation while the optical disk is spinning. To near-infrared ray absorption agents, stability of the toner and high visible transmittance in consideration of the influence on image hue are required. The compositions of the present invention can be prepared and applied in a variety of ways to a variety of substrates. The wavelength sensitivity of the photo-sensitive elements of semi-conductors, which is used at the light receiving section of illumination sensors has a peak at the infrared region having longer wavelength than visible rays. Dye - Dye - Dyeing techniques: Direct, or substantive, dyes are applied to the fabric from a hot aqueous solution of the dye. However, it is to be understood that the following is only exemplary or illustrative of the application of the principles of the present invention. ★★★★★ In one e color forming composition can be applied to an optical disk and select portions thereof developed using a laser or heat source. Typical commercial IR lasers found in common CD and DVD equipment are at a frequency of about 650, 780, and 900 nm, and thus, the compositions of the present invention using appropriate infrared radiation absorbers can be used in equipment that is already commonly available on the market. bath toys, swimming pool toys, battery testers etc. 1★ They change color back and forth with fluctuating temperatures. The absorber can be configured to be in a heat-conductive relationship with the leuco dyes of the present invention. In some cases the protection leaving group and absorber can be in the same molecule e.g. In one aspect, the deprotecting agent provides a mechanism for removing the above protection leaving groups via a chemical reaction therewith.
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