Abstract:
A method for making a flexographic printing master comprising the steps of: a) providing a flexographic printing support (1); b) providing an inkjet printing means (32); c) applying a mesa relief (40) on the flexographic printing support (1) with the inkjet printing means (32); and d) applying an image relief (38) with the inkjet printing means on the mesa relief (40). A method for making a flexographic printing master with the imaging apparatus is also disclosed.
Abstract:
A method for making a flexographic printing master comprising the steps of: a) providing a flexographic printing support (1); b) applying image-wise on the flexographic printing support (1) subsequent layers of radiation curable liquid by an inkjet printing means (32) whereby one or more applied layers are immobilized using a curing means (39) before one or more subsequent layers are applied, such that a relief with a top hat profile is obtained; and c) grinding the relief so that the height DT of a top hat segment (23) is reduced.
An imaging apparatus for performing the above method is also disclosed.
Abstract:
A method of making a flexographic printing forme comprising the steps of: (1) providing a flexographic support; (2) applying a powder layer on said support; (3) imagewise jetting a curable composition on said powder layer; (4) at least partially curing said jetted curable composition; (5) repeating steps (2) to (4) until the total thickness of said powder layers is greater than 100 µm. (6) removal of the powder not embedded in the imagewise jetted and at least partially cured composition; (7) optionally overall post curing.
Abstract:
The present invention relates to a curable jettable fluid for making a flexographic printing master characterized in that the jettable fluid comprises a monofunctional (meth)acrylate monomer, a polyalkylene glycol di(meth)acrylate monomer of which the polyalkylene glycol chain has a MW of at least 300 and at least 1 wt.% of a difunctional (meth)acrylate monomer according to Formula I or II,
wherein k and m in Formula I is an integer ranging from 0 to 5, l in Formula I is an integer ranging from 1 to 20, n in Formula II is 1, 2, 3 or 4, R in Formula I and II is H or CH 3 , and R' in Formula II is H or an alkyl group.
Abstract:
A method of making a flexographic printing forme precursor for laser engraving comprising the steps of: (i) providing at least one layer of a curable composition on a substrate; (ii) curing said at least one layer;
characterized in that the curable composition forming an outermost layer of said precursor comprises at least 0.5 % by weight relative to the total weight of said composition forming the outermost layer of an organo-silicon compound, said organo-silicon compound comprising at least one polymerizable group.