摘要:
A method is disclosed for accurate reproduction of high-quality halftone images comprising microdots by means of lithographic plate materials which comprise a heat-sensitive positive-working coating that requires wet processing. Such microdots have a dot size ≦25 μm and may be obtained by stochastic screening or by amplitude-modulated screening at a ruling of not less than 150 lpi. It has been established that the “physical right exposure energy density” (physical REED) lies in the range from CP to 1.5*CP, wherein the physical REED is defined as the energy density at which the physical area on the plate, occupied by a microdot corresponding to a 50% halftone in the image data, coincides with the 50% target value; and wherein CP is the clearing point of the plate which is defined as the minimum energy density that is required to obtain, after processing, a dissolution of 95% of the coating. An accurate reproduction of microdots can therefore be achieved by exposing the material with light having an energy density in the range from CP to 1.5*CP. Loss of microdots by overexposure is thereby avoided.
摘要:
Printing method wherein more than one logical printer is defined and wherein for a print job defined by a modality for a specific logical printer an associated set of pre-defined print characteristics and/or a predefined decision profile e.g. defining a back up printer, is selected and applied when performing the print job.
摘要:
A bundle for simultaneous refilling of chemicals for processing colour photography silver halide materials in an automatic processing apparatus, wherein the bundle comprises at least one bottle with the refilling solution for a colour developer and at least two bottles with refilling solutions for a bleach-fixing bath, characterized in that the bottle with the refilling solution for the colour developer comprises more than 60 g of colour developer substance per 1 L of bottle volume, is distinguished in that the capacity of the bundle is increased.
摘要:
A process for the offset printing of a receiving medium with a functional pattern comprising in any order the steps of: applying a printing ink to a printing plate and wetting the printing plate with an aqueous fountain medium containing a solution or a dispersion containing at least one moiety having at least colouring, pH-indicating, whitening, fluorescent, phosphorescent, X-ray phosphor or conductive properties.
摘要:
A method of making a lithographic image is disclosed, which comprises the steps of providing a lithographic imaging material comprising a support and a heat- or light-sensitive coating; image-wise exposure of the coating to heat or light, thereby obtaining a latent image in said coating, the latent image consisting of a set of exposed areas in the coating and a set of non-exposed areas in the coating; development of the latent image by supplying a processing liquid to the coating and evacuating, by means of a suction device, the processing liquid together with (i) substances removed from the exposed areas without removing such substances from the non-exposed areas or together with (ii) substances removed from the non-exposed areas without removing such substances from the exposed areas. The method is especially suitable for processing a lithographic printing plate while it is mounted in a plate-setter or a printing press, without the risk of damaging or contaminating electro-optical components of such equipment.
摘要:
A photosensitive image-forming element has been provided, comprising on a support at least one photosensitive layer containing silver halide crystals which are internally doped with a transition metal complex (more preferably a metal halide chalcogenic cyanate complex, further called a `MHCC`-complex) forming a deep and permanent electron trap, wherein said transition metal complex satisfies the general formula (1) as disclosed in the claims and in the description.
摘要:
The present invention is directed to a heat mode imaging element for making a lithographic printing plate including on a lithographic base with a hydrophilic surface, a first layer including a polymer, soluble in an aqueous alkaline solution, and a top layer on the same side of the lithographic base as the first layer. The top layer is IR-sensitive and unpenetrable for an alkaline developer. The first layer and the top layer may be one and the same layer. The top layer is characterized in that it contains at least one compound containing epoxy units in an amount between 20 and 500 mg/m.sup.2 and a hardener.
摘要翻译:本发明涉及一种用于制造平版印刷版的热模式成像元件,该平版印刷版包括在具有亲水表面的光刻基底上,包含可溶于碱性水溶液的聚合物的第一层和位于同一侧的顶层 光刻基底为第一层。 顶层对于碱性显影剂是IR敏感的和不可穿透的。 第一层和顶层可以是同一层。 顶层的特征在于其含有至少一种含有20-500mg / m 2的环氧单元的化合物和一种硬化剂。
摘要:
The machine comprises: a pair of winding rolls (1, 3) defining a winding cradle (5); feed means (13) for feeding a weblike material (N) toward said cradle (5); slitter means (14) for slitting said weblike material (N) lengthwise; insertion means (55) for inserting a plurality of axially aligned tubular winding cores (A) into said winding cradle (5); and a slitting station (49, 51) situated upstream of said winding rolls (1, 3), with a plurality of tools (67) for dividing, at right angles to its axis, a tube (T) of great length into tabular cores (A) of limited length. The slitting station (49, 51) contains a mandrel (71) with means for inserting said mandrel (71) into said tube (T) and for withdrawing the mandrel from the tubular cores obtained by dividing up said tube.
摘要:
According to the present invention a data card is provided which comprises a heat-mode laser recording medium on a support and wherein said laser recorder medium is covered by a thin flexible glass layer. The data card has a higher mechanical strength, an improved shelf-life and offers better security with regard to counterfeiting. The heat-mode laser recording medium is preferably a metal layer of which the optical reflectivity or density can be changed by laser exposure. The glass layer is preferably a borosilicate glass having a thickness less than 850 .mu.m.
摘要:
A method for checking whether an article has been inspected by penetrating radiation is described, wherein the article is provided with a heat stimulable storage phosphor whereby penetrating radiation leaves a human- or machine-readable semi-permanent or permanent mark. The article is irradiated in order that both the article and the stimulable storage phosphor are irradiated. The article is checked by heating the storage phosphor, releasing flourescent light and detecting the flourescent light by human eye.