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Developing solution for heat-sensitive positive picture CTP plate

A heat-sensitive positive image and developer technology, applied in the field of developer, can solve the problems of poor dispersion stability, poor fatigue resistance, and small tolerance of color photoresist, and achieve good dot reduction, good ink retention, and wide operating temperature Effect

Active Publication Date: 2009-05-27
LUCKY HUAGUANG GRAPHICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defoaming properties of the existing developer, the allowable operating temperature and the poor dispersion stability of the color photoresist, and to make up for the shortcomings of the existing developer such as poor versatility, poor fatigue resistance, and small tolerance, and to provide a Low foam, wide range of allowable operating temperature, good density stability of graphics and text parts, good versatility, high fatigue resistance, large tolerance thermal positive CTP plate developer

Method used

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  • Developing solution for heat-sensitive positive picture CTP plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of developing solution

[0036] Each component of developing solution and the parts by weight of each component are as follows:

[0037] (A): SiO 2 / Na 2 O 11.1 parts by weight, modulus 3

[0038] KOH 4 parts by weight

[0039] (B): 1 part by weight of sodium phosphate

[0040] (C): 8 parts by weight of glycerin

[0041] (D): Zonyl TM FSN 4 parts by weight

[0042] (E): 71.9 parts by weight of water

[0043] First add 80 parts by weight of water into a plastic container, then add 8 parts by weight of glycerin and 4 parts by weight of ZonylTM FSN, slowly mix until the bottom of the thick matter dissolves, add 11.1 parts by weight of SiO2 / Na2O with a modulus of 3 , and then add 1 weight part of KOH and 1 weight part of sodium phosphate, stir rapidly until dissolved, and add water to 100 weight parts. To test the conductivity, adjust the conductivity to 91-92mS / cm by adjusting the amount of KOH, and the total amount of KOH is 4 parts by weig...

Embodiment 2

[0048] (1) Preparation of developing solution

[0049] Each component of developing solution and the parts by weight of each component are as follows:

[0050] (A): SiO 2 / Na 2 O 13.7 parts by weight Modulus 2.8

[0051] KOH 4 parts by weight

[0052] (B): 1 part by weight of sodium hexametaphosphate

[0053] Sodium phosphate 0.5 parts by weight

[0054] (C): 8 parts by weight of glycerin

[0055] (D): Zonyl TM FS300 4 parts by weight

[0056] (E): 68.8 parts by weight of water

[0057] The method of Example 1 was repeated for each component in the above parts by weight to obtain a developer solution with a pH value of 12.5.

[0058] (2) Evaluation method of developer

[0059] The developing ability of the developing solution was evaluated using the evaluation method in Example 1, and the evaluation results are listed in Table 1.

Embodiment 3

[0061] (2) Preparation of developing solution

[0062] Each component of developing solution and the parts by weight of each component are as follows:

[0063] (A): SiO 2 / Na 2 O 29.8 parts by weight Modulus 2.6

[0064] Diethanolamine 2.8 parts by weight

[0065] KOH 4 parts by weight

[0066] (B): 2 parts by weight of sodium pyrophosphate

[0067] (C): 8 parts by weight of glycerin

[0068] (D): Zonyl TM FSE 4 parts by weight

[0069] (E): 49.4 parts by weight of water

[0070] Repeat the method of Example 1 for each of the above components to obtain a developing solution, the pH of which is 14.

[0071] (2) Evaluation method of developer

[0072] The developing ability of the developing solution was evaluated using the evaluation method in Example 1, and the evaluation results are listed in Table 1.

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Abstract

The invention discloses a developer for a thermal sensitive positive printing CTP plate. The developer comprises: (A) 10 to 40 weight portions of at least one alkali compound of diethanolameine, triethylamine, trolamine, alkali metal hydroxides, alkali metal silicates, and alkali metal phosphates; (B) 1 to 2 weight portions of at least one substance of sodium phosphate, sodium pyrophosphate, sodium tripolyphosphate and sodium hexametaphosphate; (C) 6 to 30 weight portions of aqueous fusion or aqueous dispersion thickener; (D) 2 to 8 weight portions of fluorine surfactant; and (E) water. The weight portions are determined based on 100 weight portions after the water is added. The developer has the advantages of a wide permissible operating temperature range, good graphic text partial density stability, good versatility, high fatigue resistance, high tolerance level, and the like.

Description

technical field [0001] The invention relates to a developing solution, in particular to a positive photosensitive composition developing solution. Background technique [0002] CTP technology has brought huge changes to the printing industry. Regarding the development trend of CTP technology, thermal CTP plate making technology is becoming more and more mature and popular. The development of new thermal CTP plates with excellent performance has become one of the focuses of printing plate manufacturers. . Among the thermal CTP plates that have been commercialized at present, Yangtu thermal CTP plates are the mainstream in the market. After this type of plate is scanned by laser, there is a difference in solubility between the coating of the visible part and the non-visible part in the developer. Water, the non-visible coating does not dissolve and stays to form a part of the image and text that is ink-friendly. The quality of the developer directly affects the performance o...

Claims

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Application Information

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IPC IPC(8): G03F7/32
Inventor 刘明芳赵伟建景文盘张振亚李长山
Owner LUCKY HUAGUANG GRAPHICS
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