摘要:
The invention relates to a photosensitive printing form for a flexographic printing method (5). The printing form comprises a base (5a), a first series of relief patterns (5b) placed on an image area (5c) of the base (5a), the relief patterns (5b) of the first series having a first elevation (el) with respect to the base (5a), a second series of relief patterns (5b'), placed outside the image area (5c) of the base (5a), the patterns (5b') of the second series of patterns having a second elevation (e2) with respect to the base (5a), the second elevation (e2) being lower than the first elevation (el). The invention also relates to a method of manufacturing such a printing form.
摘要:
A method for fixing and treating a flexible plate (100) on a drum (200) comprising the steps: providing a flexible plate comprising a support layer (170) made of a first material and at least one additional layer (110, 160) made of a second material which is different from said first material, wherein one or more thin film side wings (120, 130,140,150) are connected to one or more sides of the flexible plate, said one or more thin film side wings having a thickness which is at least 5 times smaller than the thickness of the flexible plate; positioning the flexible plate on the drum such that the lower face of each thin film side wing of the flexible plate covers at least one vacuum suction opening (250); performing a treatment on at least one layer of the flexible plate whilst rotating the drum.
摘要:
The invention pertains to a printing form and a process for preparing the printing form from a curable composition that includes an epoxy resin, less than a stoichiometric amount of at least one amine curing agent, and optionally a catalytic curing agent and/or a latent curing agent. The process includes applying the curable composition to a supporting substrate to form a layer, partially curing the layer at a first temperature, engraving the partially cured layer, and then completing the curing by heating at a second temperature greater than the first temperature. The less than stoichiometric amount of the amine curing agent guarantees that after the first curing step, epoxy functionalities in the curable composition will be available for second curing step. The optional catalytic curing agent or latent curing agent promotes completion of the cure at higher temperature. The process prepares printing forms, particularly gravure printing forms, having a cured resin composition layer that is engravable, resistant to solvent inks and to mechanical wear, and capable of printing gravure-quality images.