Lithographic printing plate
A lithographic, process-free technology, applied in printing, printing process, printing plate, etc., can solve the problems of low contrast and plate inspection performance to be improved, and achieve the effect of excellent resolution and excellent plate inspection performance
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Embodiment 1
[0107] Bottom coloring example 1
[0108]On an aluminum plate having a thickness of 0.28 mm, the coloring coating liquid C-1 was coated with a wire bar #20, and dried. Then, the photosensitive resin composition B manufactured in Synthesis Example 1 was uniformly applied using wire rod #14, and dried at 120°C for 1 hour to form a film into a photosensitive layer with a thickness of 2 μm. The color of the original is dark blue-purple. For the original printing plate manufactured as above, use an 830nm semiconductor laser exposure machine to make the energy on the plate surface 200mJ / cm 2 The laser was irradiated, and as a result, the exposed area became white.
[0109] (Evaluation)
[0110] With respect to the plate on which the image was formed as described above, the plate verification property was evaluated. The evaluation was confirmed by observing the exposed dots using a magnifying glass with a magnification of 20 times.
[0111] ○: The shape of 2 to 98% of the dots can be cle...
Embodiment 2
[0116] Bottom coloring example 2
[0117] On an aluminum plate having a thickness of 0.28 mm, the coloring coating liquid C-2 was coated with wire rod #14, and dried at 120°C for 5 minutes. Then, the photosensitive resin composition B was applied and dried in the same manner as in Example 1, to form a film into a photosensitive layer with a film thickness of 2 μm. The color of the original version is black. For the original printing plate manufactured as above, use an 830nm semiconductor laser exposure machine to make the energy on the plate surface 200mJ / cm 2 The laser was irradiated, and as a result, the exposed area became white. Regarding the plate verifiability, it was evaluated in the same manner as in Example 1. Table 1 shows the results.
Embodiment 3
[0119] Bottom coloring example 3
[0120] On an aluminum plate having a thickness of 0.28 mm, the coloring coating liquid C-3 was coated with a wire rod #20, and dried at 120°C for 5 minutes. Then, the photosensitive resin composition B was applied and dried in the same manner as in Example 1, to form a film into a photosensitive layer with a film thickness of 2 μm. The color of the original version is black and purple. For the original printing plate manufactured as above, use an 830nm semiconductor laser exposure machine to make the energy on the plate surface 200mJ / cm 2 The laser was irradiated, and as a result, the exposed area became white. Regarding the plate verifiability, it was evaluated in the same manner as in Example 1. Table 1 shows the results.
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Abstract
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