Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Silver halide emulsion with high image contrast, and preparing method and use thereof

A silver halide and emulsion technology, which is applied in the field of printing plate making, can solve the problem of inability to improve the r value of CTP plates, and achieve the effects of high image contrast, improved image contrast, and high image density.

Inactive Publication Date: 2004-06-30
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the silver salt diffusion transfer method, it is impossible to increase the r value of the CTP plate through enhanced development. How to improve the image contrast or image gamma coefficient of the CTP plate prepared by the silver salt diffusion transfer method is the common pursuit of everyone. The problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silver halide emulsion with high image contrast, and preparing method and use thereof
  • Silver halide emulsion with high image contrast, and preparing method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0068] Adopt the method of comparative example 1, difference is in the emulsification process of step (1), add 1.5 * 10 by every mole silver halide -6 moles of IrCl 4 , other preparation conditions and steps are the same as in Comparative Example 1 to prepare the silver chlorobromide emulsion of the present embodiment, and the emulsion properties are shown in Table 3.

[0069] Using the silver chlorobromide emulsion prepared in this example, a CTP plate and an offset printing plate were prepared and printed according to the method of Comparative Example 1. The printing results are shown in Table 4.

Embodiment 3

[0071] Adopt the method for embodiment 2, difference is: replace 1.9mol / l NaCl solution and 0.1mol / l NaBr solution with 1.95mol / lNaCl solution and 0.05mol / l NaI solution; In step (1) emulsification process, press Add 1.25×10 per mole of silver halide -6 moles of RhCl 3 , without adding 1.5×10 -6 moles of IrCl 4 , other preparation conditions and steps are the same as in Example 2 to prepare the silver chloroiodide emulsion of the present embodiment, and the emulsion properties are shown in Table 3.

[0072] Using the silver chloroiodide emulsion prepared in this example, a CTP plate and an offset printing plate were prepared and printed according to the method in Example 2. The printing results are shown in Table 4.

Embodiment 4

[0074] The method of Comparative Example 1 is adopted, and the difference is that before adding the triazindoleizine stabilizer in the step (2) chemical ripening process, add 1.5 × 10 per mole of silver halide -6 moles of IrCl 4 , other preparation conditions and steps are the same as in Comparative Example 1 to prepare the silver chlorobromide emulsion of the present embodiment, and the emulsion properties are shown in Table 3.

[0075] Using the silver chlorobromide emulsion prepared in this example, a CTP plate and an offset printing plate were prepared and printed according to the method of Comparative Example 1. The printing results are shown in Table 4.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
surface roughnessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to printing plate-making field, especially refers to high image contrast silver halide emulsion and the manufacturing method in silver salt diffusion abevacuation plate-making system, and the application in the high image contrast CTP plate and CTP offset printing plate. The emulsion includes chlorobromide and chloride silver iodide, aurothio chemical induction enhancing agent, triaindole pyrazine stabilizer, colorant light spectrum induction enhancing agent, celluloid and water, the emulsion also includes iridium salt, rhodium salt or the compound of them with any ratio.

Description

technical field [0001] The invention belongs to the field of printing plate making, and particularly relates to a silver halide emulsion with high image contrast and a preparation method thereof in a silver salt diffusion transfer method plate making system, and the silver halide emulsion with high image contrast in the preparation of high contrast CTP plates and CTP offset printing version of the application. Background technique [0002] Applying the principle of silver salt diffusion transfer reversal (DTR) to prepare computer-to-plate materials (Computer To Plate, abbreviated as CTP) and CTP offset printing plates in U.S. Pat. No. 4,160,670, U.S. Pat. No. 5,427,889 and EP-A -945,756 of them have been published. [0003] At present, DTR-image is used as a CTP offset printing plate, and the aluminum base plate is generally used as a support, and then a layer of nano-sized physical development core is coated on the support, and after drying, a layer of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G03C8/28G03F7/07G03F7/09G03F7/32
Inventor 陈萍段培成盛丽琴郑德水
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com