Screen printing photopolymer needs to be exposed to a solid step 7 on a 21 step test and letterpress plates need to hold a solid step 18. Photopolymer film, originally a product of the electronics industry, offers several options to transfer paintings, drawings, photocopies and digital printouts to the plate. Flexography India Press is a manufacturer of Flexography Photopolymer Plate making Equipment. This phasing tendency increased as more plates were washed. Platemaking by hand is a straightforward process. KM73 Intaglio plates $ 11.75 – $ 672.00. Again the plate quality was equivalent that obtained with perchloroethylene at a higher exposure time. MacDermid’s Ryan Vest looks at how the plate development and supply side of the fence, sees this technology playing out. Brushing or agitation can be used to facilitate the removal of the non-polymerized portion of composition. This invention presents terpene-based solvents suitable for use in the processing of a wide variety of photopolymer printing plates. Flexography (often abbreviated to flexo) is a form of printing process which utilizes a flexible relief plate. It is a freestanding unit with wheels so can be manoeuvred. The terpenes, being natural products, also produce low safety hazards. In addition the washed-out (uncured) photopolymer tended to separate from this solution. Water should be about room temperature. Direct-to-plate photogravure was not new in 2018. This effect, which is quite unexpected, permits repeated use of the reclaimed solvent over extended periods of time, since the amount of uncured polymer remaining in the solvent is quite low. endstream
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<. A wide variety of terpenes are suitable for use in the solvents of this invention including, but not limited to, alloocimene terpenes, dipentene, d-limonene, l-limonene, alpha pinene, citronellol terpenes, linalool, geraniol, and orange terpenes. In fact, this property can be exploited by adding additional non-solvent to the blended terpene/non-solvent system. Both plates had image relief of 30 to 35 mils. The image quickly becomes visible. These terpene-based solvents may be substituted for the synthetic hydrocarbon or halogenated hydrocarbon solvents presently used for processing photopolymer printing plates. Even at 50 square feet, however, the recirculation pump could easily maintain the emulsion. 0
Success of photopolymer plates revolutionized flexographic printing. This allowed extended use of the washout solution because the spontaneous polymer separation prevented a build up of photopolymer, permitting continued use of the solution; up to approximately 200-300 square feet of plate area could be processed without distillation. Useful classes of emulsifiers for forming emulsions of these terpene class solvents with water include sulfosuccinates, in particular sodium dioctyl sulfosuccinate (Aerosol OT-100); polyethylene glycol p-isooctylphenyl ethers (Triton X-100); and polyethylene glycol mono(nonylphenyl) ethers (Triton N-57). Because of the greater solvating power of the 100% solvent there was a problem with plate swelling and loss of plate detail. Tokyo, Japan & Brussels, Belgium, November 12, 2020. A useful class of hydrotropes for aiding in emulsion formation and stabilization is the alkali metal salts of aromatic sulfonates such as potassium toluene sulfonate. 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