摘要:
The present invention provides an imaging element comprising on a support in the order given a photosensitive layer comprising a silver halide emulsion and an image receiving layer containing physical development nuclei in water permeable relationship with said emulsion layer, characterized in that said imaging element comprises at least 50 mg/m 2 of tetramethyl reductic acid and at least 100 mg/m 2 of ascorbic acid. According to the present invention there is further provided a method for making a lithographic printing plate comprising the steps of image-wise exposing an imaging element as defined above and subsequently developing a thus obtained imaging element by an alkaline processing liquid in the presence of developing agent(s) and silver halide solvent(s).
摘要:
The present invention provides a method for making an offset printing plate according to the silver salt diffusion transfer process comprising the steps of:
(a) image-wise exposing an imaging element comprising (i) a hydrophilic base, (ii) an image receiving layer containing physical development nuclei, (iii) an intermediate layer, and (iv) a silver halide emulsion layer, (b) applying an aqueous alkaline solution to the imaging element in the presence of (a) developing agent(s) and (a) silver halide solvent(s) to form image-wise in said image receiving layer a silver image, (c) treating the imaging element to remove the layer(s) on top of said image receiving layer, characterized in that said imaging element has been stored before image-wise exposure in a surrounding having at 22°C a relative humidity between 20% and 50%.
According to the present invention there is also provided a package of the imaging element, making said imaging element suitable for use in the above defined method.
摘要:
The present invention provides an imaging element comprising on the same side of a support in the order given a base layer, a light sensitive layer containing a silver halide emulsion and a surface layer comprising physical development nuclei characterized in that said base layer and/or said light-sensitive layer comprises gelatin being hardened with a divinylsulfonyl hardener such that the time needed to completely brake down said base layer, light sensitive layer and surface layer using an aqueous solution of 0.14% by weight of NaOCl at 25°C is between 1000s and 1600s. A lithographic printing plate can be obtained with such imaging element according to the silver salt diffusion transfer process and exhibits an improved printing endurance.
摘要:
The present invention provides an imaging element comprising in the order given (i) a hydrophilic grained and anodized aluminum support with an aluminum oxide barrier layer of at least 10 nm thickness, (ii) an image receiving layer containing physical development nuclei in an amount of at least 0.7 mg/m² and (iii) a photosensitive layer containing a silver halide emulsion being in water permeable relationship with said image receiving layer. The invention also relates to a method for making lithographic plates with said imaging element.
摘要:
The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process comprising the following steps:
image-wise exposing with a high intensity-short time exposure an imaging element comprising on a support (i) a photosensitive layer comprising silver halide particles substantially free of built-in Iridium, said silver halide particles containing more than 95 mole% of silver chloride and having an average grain diameter of less than 0.27 µ and (ii) an image receiving layer containing physical development nuclei and developing said imaging element using an alkaline processing liquid in the presence of developing agent (s) and a meso-ionic compound.
摘要:
Vinyl stearate-vinyl chloride copolymers and blends of polyvinyl stearate and polyvinyl chloride have been found to have good dye permeability. They have been incorporated into photothermographic constructions as barrier interlayers and dye receiving layers.