Abstract:
A method of manufacturing a flexographic printing plate includes designing a patterned design that includes a plurality of lines and a plurality of support structures and laser-ablating the patterned design into a thermal imaging layer. A support structure of the plurality of support structures is disposed at an offset relative to a line of the plurality of lines.
Abstract:
Digital bebilderbare Flexodruckelemente zur Herstellung von Flexodruckplatten, welche unter Verwendung von Kohlenwasserstoffen umfassenden Auswaschmitteln entwickelbar sind, welche zwischen der fotopolymerisierbaren Schicht und der digital bebilderbaren Schicht eine polare, ultradünne, gegen Sauerstoff sperrende Barriereschicht ausweisen. Verfahren zur Herstellung von Flexodruckplatten unter Verwendung derartiger digital bebilderbarer Flexodruckelemente durch Bebildern, Belichten, Auswaschen, Trocknen und Nachbehandlung, wobei man das Auswaschen mittels Kohlenwasserstoffe umfassender Auswaschmittel vornimmt.
Abstract:
An imaging apparatus (10) forms an image on an offset media (100) including a carriage (220), which moves relative to the offset media wherein the offset media includes a top and bottom layer. A first imaging unit (208) mounted on the carriage and configured to image at high intensity the non-image areas of the offset media. A second imaging unit (212) mounted on the carriage configured to image at lower intensity than the first imaging unit wherein the second imaging unit is configured to image the image of the offset media. A data feeder (232) configured to supply non-image data to the first imaging unit and image data to the second imaging unit. A controller (216) configured to provide imaging data to the data feeder. Image areas on top layer are fixated by the second imaging unit. Non-image areas are ablated from the top layer by the first imaging unit.
Abstract:
Flexographic printing precursors are prepared using laser-engraveable compositions containing a laser-engraveable resin and chemically-crosslinked organic porous particles. The presence of these porous particles, which can include an infrared radiation absorber, improves various imaging and performance properties in the preparation of flexographic printing members such as flexographic printing plates and printing sleeves.
Abstract:
In various embodiments, a recording medium comprises an oleophilic substrate and, thereover, a topmost oleophobic layer comprising a cured polymeric silicone matrix that consists essentially of the addition-cure reaction product of a vinyl-functional polydialkylsiloxane and a silane cross-linking agent. The vinyl-functional polydialkylsiloxane has a molecular weight ranging from 30,000 to 75,000 or 1 10,000 to 130,000. If the molecular weight of the vinyl-functional polydialkylsiloxane is within the range of 30,000 to 75,000, the molar ratio of silane groups to vinyl groups is within the range of about 11 :1 to about 25:1; and if the molecular weight of the vinyl-functional polydialkylsiloxane is within the range of 110,000 to 130,000, the molar ratio of silane groups to vinyl groups is from about 5:1 to about 27:1. The recording medium may be used as a lithographic printing plate.
Abstract:
Lithographic printing plates can be prepared and made ready for lithographic printing with simple wet development or processing. A positive- working lithographic printing plate precursor is exposed to infrared radiation for example at 200 to 300 mJ/cm 2 . The exposed precursor can be simply processed with water or an aqueous solution, and uniformly exposed to radiation, heat, or both. The positive-working lithographic printing plate precursor has a hydrophilic aluminum substrate, a crosslinked hydrophilic inner layer, and an oleophilic surface layer that is weakly bonded to the crosslinked hydrophilic inner layer.
Abstract translation:平版印刷版可以通过简单的湿法显影或加工制备并准备进行平版印刷。 将正性平版印刷版原版曝光于例如200至300mJ / cm 2的红外辐射。 暴露的前体可以用水或水溶液简单加工,并且均匀地暴露于辐射,加热或两者。 正性平版印刷版原版具有亲水性的铝基材,交联的亲水性内层和与交联的亲水性内层弱结合的亲油性表面层。
Abstract:
A method is used to prepare lithographic printing plates by developing positive- working lithographic printing plate precursor that has a single imageable layer that comprises a polymer binder having recurring units represented by Structure (lb) below: wherein the recurring units of Structure (lb) are present in an amount of at least 25 and up to and including 60 mol %, all based on total recurring units in the polymer binder, and R2 is a substituted or unsubstituted hydroxyaryl group in which the hydroxyl group is ortho to the ester linkage, to form exposed and non-exposed regions in the imageable layer. The resulting imaged lithographic printing plate is developed using a silicate-free developer composition having a pH of at least 12 and comprising at least 0.001 gram-atom/kg of a metal cation M 2+ selected from the group consisting of barium, calcium, strontium, and zinc cations.