JPH0646291B2 - Control strip for checking the degree of baking - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to the production of a printing plate for color printing by printing on a PS plate by using, for example, a color separation film in a photoengraving process, or a pattern original plate. When making a film pattern for printing a printed circuit board or a pattern for various masks by reversing the film onto a photosensitive material such as a film, check the degree of baking on those printing plates and make sure that the exposure amount in the printing operation is appropriate. Control strips used to adjust to.

[Conventional technology]

In the printing operation of the photoengraving process, the degree of printing of a printing plate, film pattern, etc. (hereinafter, the printing plate will be described as an example) is checked in order to adjust an appropriate exposure amount.

Conventionally, as a method of managing the degree of baking, from white to black, for example, a density range of 0.05 to 3.05 is sequentially applied to 0.15
Using a transmission gray scale in which the difference in the density of the film is applied to a film, this is printed together with the negative on a plate material such as a PS plate (hereinafter referred to as the PS plate), and then developed on a printing plate prepared and then developed. The operator visually confirms the gray scale display area on the plate produced by the above method. For example, if the density equivalent to 0.6 to 0.8 of the original gray scale remains, it means that the printing degree is proper. Is determined.

A technique widely used in Europe as an offset printing quality control method is the Brunner system developed by Brunner. This Brunner system allows numerical control of print quality, and uses a control strip in which a plurality of elements (patches) are combined for various controls. One of the multiple elements of this control strip is used to check the degree of printing on the printing plate. As shown in the enlarged view in Fig. 14, minute points of different sizes (highlight points) There is an element that combines a plurality of types of ultra-fine wire with line width (hereinafter referred to as micron wire).
The degree of baking in the printing plate is adjusted so that the lines of .mu.m or more clearly remain and the points and lines below them disappear.

In addition, as a method of managing the degree of baking of a film pattern or the like, there is a method of actually measuring and managing the dimensions and the like of each part of the printing plate by using equipment such as a tabletop microscope and a length measuring machine.

[Problems to be solved by the invention]

However, the method of managing the printing degree of the printing plate by using the transmission gray scale may be different depending on the person because the judgment is somewhat subjective. For example, within a range where the exposure time changes by about 25%. However, there is a problem that proper judgment cannot be performed.

Further, in the method using the control strip of the Brunner system, the micron element has a vertical dimension L '.
Is about 6 mm and the lateral dimension W'is about 2.5 mg.
Since it is configured by drawing parallel lines of μm, 8 μm, 11 μm, 13 μm and 16 μm, it is very difficult to see and there is a problem that a magnifying glass (enlarged line) or the like is required for confirmation.

Further, the method of using a device such as a table-top microscope or a length measuring machine requires considerable equipment and has a problem that the confirmation work is troublesome.

The present invention solves the above-mentioned problems in the prior art, and the degree of printing of a printing plate can be confirmed at a glance without using tools such as a magnifying glass and a microscope, and any equipment.
Moreover, it was a technical issue to provide a control strip that does not cause individual differences in the judgment results no matter who judges it, so that the exposure amount in the printing operation can be adjusted appropriately and quickly. .

[Means for solving problems]

According to the present invention, a display area in a control strip is divided into a plurality of areas, and each of the areas is further subdivided into a plurality of sections. Composed of a combination of multiple types of unit patterns obtained by forming multiple types of ultrafine wires at a predetermined pitch, and depending on the degree of exposure given when printed on a photosensitive material such as a PS plate or film. Thus, the fine line having a predetermined line width disappears on the printing plate, and characters, numbers, symbols, etc. are displayed and displayed in the portion corresponding to the display area.

[Action]

When the control strip having the above-mentioned configuration is printed on a PS plate together with a desired film original plate and the like and developed to produce a printing plate, a predetermined area is set in the printing area of the control strip on the printing plate according to the amount of exposure during printing. Since the micron line having a width less than the line width disappears and different characters, numbers, symbols, etc. are displayed and displayed, the operator can know the printing degree of the printing plate accurately by just looking at the display.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that each of the drawings is an enlarged view to the extent required.

FIGS. 1 to 8 show one embodiment of the present invention, and the construction thereof will be described while showing the procedure for producing the control strip of the present invention based on these drawings.

First, as shown in FIG. 1, the display area a is divided into a plurality of sections d in consideration of the size of the display area a of the control strip. In this example, the display area a has a vertical dimension L of 9 mm and a horizontal dimension W of 13 mm, and is divided into 9 (vertical) × 13 (horizontal) = 117 sections d. Therefore, the size of the area d is 1 mm × 1 mm. Next, a display method as shown in FIGS. 3 (a) to 3 (e) is determined. In this example, black characters are “NO”, “8”, and “O”.
Five types of display systems are adopted, "K", "13" with white characters, and "NO". Next, in relation to those display methods,
The unit pattern arranged in each section d is divided into a plurality of sections. The unit pattern U is shown in FIG.
The vertical and horizontal dimensions l and w are each 1 mm as described above, and are sequentially divided toward the center with a width of 0.1 mm from the periphery, and are divided into five sections A, B, C, D. , E. In this example, the length is simply divided into 5 equal parts from the week side toward the center, but in actuality, considering the area ratio of each partition, etc., the width nearer to the center should be somewhat larger. Is desirable. For example, Munsell Value 2
(Reflection density: 1.52) to 10 (reflection density: 0) are divided into 5 equal parts, the reflection density corresponding to each Munsell value is obtained, and the reflection density is converted into an area ratio to determine the size of each section. It is desirable to decide.

Next, the type of micron ray is determined. In this example, 4μ
m, 6 μm, 8 μm, 11 μm, 13 μm, 16 μm, and six types of line widths of micron lines are selected, and a plurality of these micron lines are drawn at a predetermined pitch in a fixed pattern state. At this time, one type of micron ray is used for each of the sections A, B, C, D, and E. And P
The sections A, B and C of the unit pattern U are arranged so that the display as shown in FIGS. 3 (a) to 3 (e) appears in the display area on the plate according to the degree of exposure of the S plate. ,
The configuration is considered so that required micron lines are arranged in D and E, and each unit pattern U thereof is arranged in a required area of the display area a.

First, in the printing plate, when the micron line of 4 μm disappears and each micron line having a line width of 6 μm or more remains, that is, when the PS plate is underexposed, black characters are printed as shown in FIG. 3 (e). To display "NO". This includes the areas forming the letters "NO", that is, referring to FIG. 6, rows -II to VII, rows HA-IV,
D-V-V, E-VI and D-II-VIII, and D-III-VII, L-II-VIII and W-II.
A micrometer line of 6 μm is inserted in the section A of the unit pattern U arranged in each section d of the columns I to VII, and 4 μm in the section A of the unit pattern U arranged in each of the other sections d.
Insert the micron wire of. Next, when each micron line of 4 μm and 6 μm disappears and each micron line with a line width of 8 μm or more remains, it is displayed as “8” in black characters as shown in FIG. 3 (b). To This includes the areas that form the number "8", namely E-III-IV-VI-VII.
Column, H-H Row-II / V / VIII and Ri-III / IV / VI / V
The section B of the unit pattern U arranged in each section d of the II row has a micron line of 8 μm, and the section B of the unit pattern U arranged in each of the other sections d has a micron line of 6 μm. Next, when each micron line having a line width of 8 μm or less disappears and each micron line having a line width of 11 μm or more remains, that is, when the exposure amount for the PS plate is appropriate, FIG. ) As shown in black
"K" is displayed. This includes the areas that form the letters "OK", namely Rows-III-VII columns Ha-II.
・ Column VIII and row iii-column III-VII and row ii-II-VIII
Column, re-row-V, n-row-IV / VI column, le-row-III / VII column and wo-row-II / VIII column, the section C of the unit pattern U is provided with a micron line of 11 μm. , 8 in the section C of the unit pattern U arranged in each of the other areas d
Insert each micron line. Furthermore, 11 μm
Each micron line with the following line width disappears, and 13 μm and 16
When each micron line of μm remains, the blank character “13” is displayed as shown in FIG. 3 (d). This includes the areas that form the number "13", that is, row c-column III-VIII, row d-II-VIII, row e-VIII.
11 μm in the section D of the unit pattern U arranged in each section d of the row, the row row-III-VII row, the reel row-II / V / VIII column and the row-III / IV / VI / VII row. Micron lines are inserted into the sections d of the unit pattern U arranged in the other sections d, respectively. And finally, when each micron line with a line width of 13 μm or less disappears and a micron line of 16 μm remains, that is, PS
If the amount of exposure on the plate is over, then FIG.
As shown in, the blank character is displayed as "NO". This includes the areas that form the letters "NO", namely, Rows-II and VIII, Rows-IV, Rows-V, Rows-VI and Rows-II-VII. Chi-III-VII
13 μ in the section E of the unit pattern U arranged in each section d of the column, the reel row-II / VIII column and the row-III-VII column
The micron line of m is inserted into the section E of the unit pattern U arranged in each of the other areas d.

Summarizing the above, the unit pattern U has 12 types of modes (i) to (xii) as shown in FIG.
These 12 types of unit patterns U are created in an enlarged state using an automatic drawing machine or the like. Figure 5-1 (i) ~
The configuration of each unit pattern U is shown in (vi) and FIGS. 5-2 (vii) to (xii). Then, the twelve kinds of unit patterns U of (i) to (xii) are placed in the area d of the display area a in the sixth
Arrange as shown. As a result, an overall pattern as shown in FIG. 7 is obtained, and this is reduced to a required size to obtain a control strip.

When the control strip produced as described above is printed on a PS plate together with the original film and developed to produce a printing plate, a predetermined line is formed on the printing area of the control strip on the printing plate depending on the degree of exposure during printing. The micron line having a width less than the width disappears, and characters and numbers shown in FIGS. 8 (a) to 8 (e) appear and are displayed. In FIG. 8 (a), “NO” is displayed in black due to insufficient exposure, and in FIG. 8 (b), “8” is indicated in black due to insufficient exposure.
Is displayed, the same figure (c) shows "OK" in black letters due to proper exposure, and the same figure (d) shows "13" in white letters due to overexposure.
In addition, in the same figure (e), because of overexposure, white characters are "N".
"O" is displayed respectively. Therefore, the operator can immediately know the printing degree of the printing plate by looking at those displays at a glance.

9 to 11 show another embodiment of the present invention.
In this embodiment, the unit pattern is shown in FIGS. 9 (i) '-(i
As shown in v) ′, it is composed of multiple concentric rings. In the figure, points p and q are boundaries where the line width of the micron line changes, and the unit pattern shown in (i) ′ is 16 μm, 11 μm from the center to the peripheral direction.
6μm each micron line arranged in each section,
The unit pattern shown in (ii) 'is 13 μm,
8 μm, 8 μm micron rays arranged in each section, unit pattern shown in (iii) ′, 13 μm, 11 μm, 8 μm micron rays arranged in each section, and (iv) The unit pattern shown in ′ is a pattern in which each 16 μm, 8 μm, and 6 μm micron line is arranged in each section. in this way,
In this example, five line widths of micron are used.
When the unit patterns shown in FIGS. 9 (i) 'to (iv)' are arranged as shown in FIG. 10, a control strip as shown in FIG. 11 (a) is obtained. In this example, the number of display areas is 9 (vertical) × 14 (horizontal) = 12
It is divided into 6 areas. 11 (b) to (e)
Shows the display state when this control strip is printed. In the figure (b), the micron line of 6 μm disappears and “NO” is displayed in black characters, the figure (c).
Shows the state at the time of proper exposure. Each micron line of 6 μm and 8 μm disappears, each micron line with a line width of 11 μm or more disappears, each micron line with a line width of 11 μm or more remains, and the black character “OK” appears. In the figure, (d) shows each micron line having a line width of 11 μm or less, and (e) shows 1
Each micron line having a line width of 3 μm or less disappears, and FIG. 7D shows black characters and FIG. 8E shows white characters, and “NO” is displayed.

12 and 13 show still another embodiment of the present invention. 12 (i) ″ to (iv) ″ show four types of unit patterns, each having a size of 6 μm-8 μm-16 μ.
m, 8 μm-8 μm-13 μm, 6 μm-11 μm-1
It is configured by combining the respective micron lines of 6 μm, 8 μm-11 μm-13 μm. A control strip produced by arranging each of these unit patterns as required is shown in FIG. 13 (a), and the display state when the control strip is burned is shown in FIG. 13 (b) to (d). In the same figure (b), black letters “N” are displayed due to insufficient exposure, and in the same figure (c), black letters “O” are displayed by proper exposure, and in the same figure (d). Indicates that "N" is displayed as a blank character due to overexposure.

Although the present invention is configured as described above in detail, the scope of the present invention is not limited by the above description and the contents of the drawings, and various embodiments can be considered without departing from the scope of the invention. That is, the size of the display area, the method of subdividing the display area, the types of characters, numbers, symbols to be displayed, the configuration of the unit pattern, the types of micron lines drawn, etc. are limited to those of the above-described embodiment. Of course not.

Further, in the above-mentioned embodiment, the case of printing with positive-positive has been described, but the case of printing with negative-positive is the same, and in this case, the white line part disappears instead of the black line part. That is, the characters and the like that finally appear and are displayed in the display area are reversed in black and white.

〔The invention's effect〕

Since it is constructed and operates as described above in this invention,
By using the control strip of the present invention, it is possible to confirm the degree of baking of a printing plate or the like at a glance without using any tools or devices such as a magnifying glass, a microscope, and the like, and the judgment result may vary among individuals. Therefore, it is possible to properly and promptly adjust the exposure amount to the PS plate in the baking work.

[Brief description of drawings]

FIG. 1 to FIG. 8 show an embodiment of the present invention, and are views for explaining the manufacturing procedure of the control strip according to the present invention, its configuration and operation, and FIGS. FIG. 1 is a diagram showing another embodiment of the present invention,
12 and 13 are views showing still another embodiment of the present invention, and FIG. 14 is an enlarged view showing an example of a conventional control strip. a ... Display area, d ... Area, U ... Unit pattern, A, B, C, D, E ... Section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hirofumi Shimizu Inventor Hirofumi Tsuruno, Kami-ku, Kyoto-shi, Kyoto Prefecture 1-chome, No. 1 Tenjin Kitamachi 4-chome, Dai Nippon Screen Mfg. Co., Ltd. (72) Inventor Makoto Hasunuma Kyoto 4-chome, Horikawa-duji, Kyokyo-ku, Kyoto-shi, 1st in Tenjin Kita-cho, Dainippon Screen Manufacturing Co., Ltd. (72) Inventor, Shu Kondo 4-chome, Horikawa-duji, Kamikyo-ku, Kyoto Tenjin Kitamachi No. 1 No. 1 Dainippon Screen Mfg. Co., Ltd. (72) Inventor Yukio Kawai Ichijo Kamiru, Higashihorikawa Dori, Kamigyo-ku, Kyoto City, Kyoto Prefecture 5 No. 436 Tomita-cho No. 5 Photographic Chemistry Co., Ltd.

Claims (1)

[Claims] 1. A display area is divided into a plurality of sections, and the sections are further subdivided into a plurality of sections, each of which is made of one of ultrafine wires having a plurality of predetermined line widths. It is composed of a combination of multiple types of unit patterns obtained by forming a plurality of ultrafine wires at a predetermined pitch, and when printed on a photosensitive material, a predetermined amount formed in a section according to the applied exposure amount. A control strip for checking the degree of baking, in which fine lines disappear and characters, numbers, symbols, etc. appear in the area corresponding to the display area on the sensitive material.