JPH01302258A - Method for forming secondary photographic original for printing - Google Patents
Method for forming secondary photographic original for printingInfo
- Publication number
- JPH01302258A JPH01302258A JP62132377A JP13237787A JPH01302258A JP H01302258 A JPH01302258 A JP H01302258A JP 62132377 A JP62132377 A JP 62132377A JP 13237787 A JP13237787 A JP 13237787A JP H01302258 A JPH01302258 A JP H01302258A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- printing
- light source
- photographic
- dots
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000007639 printing Methods 0.000 title claims description 20
- 238000007650 screen-printing Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Preparing Plates And Mask In Photomechanical Process (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、網原版から印刷用の二次写真原稿を作成する
方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for creating a secondary photographic original for printing from a screen printing plate.
さらに詳しくは、網原版から網点のない連続調の写真原
稿を作成する方法に間する。More specifically, we will discuss a method for creating a continuous-tone photographic original without halftone dots from a halftone plate.
［従来の技術］
連続階調の写真などを印刷する場合、通常、網掛けを施
した写真原版（以下「網原版」どう）を作成し、印刷を
行う。しかし、同じ写真、あるいは同じ図柄で大きさの
異なる印刷物を製作する場合、あるいは同じ印刷を複数
の印刷所で行う場合、最初に作成した網原版から印刷用
二次写真原稿を作ることが便利である。特に複数の原稿
から貼り込みやレイアウトスキャナーによって１枚の網
原版から合成する場合、同じ網原版を再製作するよりも
、最初に製作した網原版から印刷用二次写真原稿を作る
方法が安価で、かつ便利である。[Prior Art] When printing a continuous-tone photograph, etc., a photographic original plate with shading (hereinafter referred to as a "halftone printing plate") is usually created and printed. However, when producing prints of the same photograph or the same design in different sizes, or when the same printing is carried out at multiple printing shops, it is convenient to create a secondary photographic manuscript for printing from the first halftone plate created. . Especially when combining multiple manuscripts from a single screen plate using a layout scanner, it is cheaper to create a secondary photo original for printing from the first screen plate than to re-produce the same screen plate. , and convenient.
しかし、網原版から通常の方法で作った二次写真原稿を
再度網分解すると、「モアレ」が出て使用に耐えない。However, when a secondary photographic manuscript made from a screen printing plate in the usual manner is subjected to screen resolution again, ``moiré'' appears, making it unusable.
この「モアレ」を出さなくするために、網原版からカメ
ラ撮りする場合、レンズの紋りを極端に絞って回折現象
を起こさせたりして、二次原稿には網目をなくす方法が
取られていた。In order to prevent this "moiré" from appearing, when taking pictures with a camera from a halftone plate, methods are used to eliminate the halftones in the secondary manuscript, such as by narrowing down the lens sharply to cause a diffraction phenomenon. Ta.
（特公昭６１−５６５０３ 特開昭５６−１９４０）
［発明が解決しようとする問題点コ
しかしながら、前記二つの方法は、網目は消えるか画像
のシャープネスが損われるという問題がある。(Special Publication No. 61-56503, Japanese Patent Publication No. 56-1940)
[Problems to be Solved by the Invention] However, the above two methods have problems in that the mesh disappears or the sharpness of the image is impaired.
本発明は、この問題点を解消し、網目のないシャープな
二次写真原稿を作る方法に関する。The present invention solves this problem and relates to a method for producing sharp secondary photographic originals without mesh.
［問題点を解決する手段］
本発明は、網原版から写真感光材料に焼付けるとき、撮
影倍率を０．１４倍以上０．３２倍以下に設定し、かつ
散光型光源て網原版を照明して撮影することにより、前
記問題点を解決した。[Means for Solving the Problems] The present invention provides a method in which, when printing from a screen plate onto a photographic light-sensitive material, the imaging magnification is set to 0.14 times or more and 0.32 times or less, and the screen plate is illuminated with a diffused light source. The above-mentioned problem was solved by taking pictures with
［作 用コ
Ｂ−２版の網原版（５１５ｍｍＸ ７２８ｍｍ）を用い
て、実質上、網目のない印刷用二次写真原稿を作成する
場合、製版カメラを用いて網原版を写真感光材料に０．
１２倍から０．５０倍までの倍率で撮影する。[Operation] When creating a secondary photographic original for printing that has virtually no mesh using a B-2 mesh plate (515 mm x 728 mm), use a plate-making camera to transfer the mesh plate to a photographic light-sensitive material.
Photographs are taken at a magnification of 12x to 0.50x.
例えば、フジクロームデユーブリケイティングフィルム
と大日本スクリーン製ｒＤ−４５１−８」製版カメラを
使用し、網原版を厚さ５ｍｍの乳白色アクリル板上６０
ｍｍの位置に固定し、日本光学製アボニッコールｒｆ
＝４８０ｍｍ −Ｆ＝９Ｊの紋りを２２にして撮影する
。この場合、乳白色アクリル板は散光型光源の役割を果
たしている。For example, using Fujichrome duplicating film and Dainippon Screen's rD-451-8 plate making camera, a half-tone plate was printed on a milky white acrylic plate with a thickness of 6 mm.
Fixed at the mm position, Nippon Kogaku Avonikkor RF
=480mm - Take a photo with F=9J set to 22. In this case, the milky white acrylic plate plays the role of a diffused light source.
仕上がった写真画像を精査すると、倍率０．３２以上で
撮影したものは明瞭に網目が記録されて、二次写真原稿
として使用する際、「モアレ」の発生がある。A close examination of the finished photographic images shows that those taken at a magnification of 0.32 or higher clearly show mesh patterns, and when used as secondary photographic manuscripts, "moiré" occurs.
一方、倍率０．１４以下で撮影したものは、全く網目が
見えない代わりに、画像のシャープネスが著しく損なわ
れている。On the other hand, in images taken at a magnification of 0.14 or less, the mesh is not visible at all, but the sharpness of the image is significantly impaired.
また、撮影の光学系に使用する乳白色アクリル板を用い
ないで撮影したものは、倍率０．１４以下で撮影しても
網目が残存する。In addition, if the photograph is taken without using the milky white acrylic plate used in the photographing optical system, the mesh will remain even if the photograph is taken at a magnification of 0.14 or less.
網原版から網目のないシャープな二次写真原稿を作るに
は、網版に用いられる網の単位長当たりの線数に対して
撮影光学系を通して感光材料の上に記録された解像性能
く単位長当たりの線数）を小さくするように、光学系や
感光材料を選択することが好ましい。In order to create a sharp secondary photographic original without mesh from a halftone plate, it is necessary to increase the resolution of the image recorded on the photosensitive material through the photographic optical system in relation to the number of lines per unit length of the halftone plate. It is preferable to select the optical system and photosensitive material so as to reduce the number of lines per length.
下図は、撮影倍率と網原版のスクリーン線数の組み合わ
せによって得られた結果、実質上、網目が消え、しかも
画像のシャープネスを損なわない撮影倍率を示す。The figure below shows the photographic magnification obtained by combining the photographic magnification and the number of screen lines of the halftone plate, and at which the mesh virtually disappears without impairing the sharpness of the image.
↓網目が消えシぜブネスが損なわない範囲Ｅ実施例］
Ｂ−２サイズ、１７５ ＆ｍ／インチの平版用分解網ポ
ジ（黄版用、アカ服用、アイ服用、スミ成用の４枚）の
場合、４×５サイズの写真感光材料（１０１，６Ｘ１２
７ｍｍ）に収まる倍率０．１５に設定した。使用感光材
料と光学系は、乳白色アクリル板６軸ｍの位置にスミ版
を固定し、その上に黄版を完全に一致させて重ねて固定
し、青フィルターを使用して１秒間露光した。↓Example of range E where the mesh disappears and the shiveness is not impaired] In the case of B-2 size, 175 mm/inch decomposed mesh positive for lithographic printing (4 sheets for yellow printing, red printing, eye printing, and smear printing) , 4x5 size photographic material (101, 6x12
The magnification was set to 0.15, which fits within 7 mm). The photosensitive material and optical system used were as follows: A black plate was fixed on a milky white acrylic plate at the 6-axis position m, and a yellow plate was superimposed and fixed on top of the black plate in perfect alignment, and exposed for 1 second using a blue filter.
次に黄版を取外し、アカ版を重ね、緑フィルターにより
４秒露光、更にアカ版をアイ版に換え赤フィルターで１
６秒露光した。Next, remove the yellow plate, overlap the red plate, and expose for 4 seconds using a green filter.Furthermore, change the red plate to an eye plate and use a red filter for 1
Exposure was made for 6 seconds.
３回の重複露光したフジクロームデユーブリケイティン
グフィルムを、通常の方法で現像処理し、二次写真原稿
を得た。A Fujichrome developing film exposed three times was developed in a conventional manner to obtain a secondary photographic manuscript.
この二次写真原稿から、再度通常通りの方法で平版用網
ポジ版を作成して印刷したところ、モアしは全くないシ
ャープな印刷物が得られた。When a lithographic halftone positive plate was again created and printed from this secondary photographic manuscript in the usual manner, a sharp printed matter with no mowing was obtained.
以上説明の実施例は、平版用の網ポジから直接反転カラ
ーポジの印刷用二次原稿を作成する方法だが、網原版は
平版用の網ポジだけでなく、凸版用、グラビア用の網ネ
ガ、網ポジなと何でも良い。The embodiment described above is a method of directly creating a secondary manuscript for printing with a reversed color positive from a halftone positive for planography. Anything positive is fine.
網ネガの場合は、ポジ写真感光材料（例えばプリントフ
ィルム）を使用するが、網ポジの場合も、デユーブリケ
イティングフィルムの代わりにネガ写真感光材料で一度
ネガを作り、それから上記ポジ感光材料を使用してポジ
を作っても良い。In the case of a net negative, a positive photographic material (such as a print film) is used, but in the case of a net positive, a negative is made once using a negative photographic material instead of a duplicating film, and then the above-mentioned positive photographic material is used. You can also make a positive using .
この場合、ネガ撮りとポジ起こしの倍率を変え、オーバ
ーオールで網点を消しても良い。In this case, you can erase the halftone dots by changing the magnification for negative exposure and positive exposure.
［発明の効果コ
本発明は、撮影倍率を制限することにより、写真感光材
料に投影された網原版、又は網点印刷物の網点パターン
像を、写真感光材料が解像しない大きさにすることによ
り、網点パターンのない連続調のシャープな印刷用二次
写真原稿が出来る優れた効果がある。[Effects of the Invention] The present invention makes it possible to limit the photographic magnification to make the halftone pattern image of a halftone original or halftone printed matter projected onto a photographic light-sensitive material to a size that cannot be resolved by the photographic light-sensitive material. This has the excellent effect of producing sharp continuous-tone secondary photographic originals for printing without halftone dot patterns.
Claims (1)
から写真感光材料に焼付けるときの撮影倍率を０．１４
倍以上０．３２倍以下に設定し、かつ散光型光源で網原
版を照明して撮影することを特徴とする、網原版からの
印刷用二次写真原稿作成方法。When creating a secondary photographic manuscript for printing from a screen printing plate, the photographing magnification when printing from the screen printing plate onto a photographic light-sensitive material is set to 0.14.
A method for creating a secondary photographic manuscript for printing from a screen printing plate, characterized in that the setting is set at a magnification of at least 0.32 times, and the screen printing plate is illuminated and photographed with a diffused light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62132377A JPH01302258A (en) | 1987-05-28 | 1987-05-28 | Method for forming secondary photographic original for printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62132377A JPH01302258A (en) | 1987-05-28 | 1987-05-28 | Method for forming secondary photographic original for printing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01302258A true JPH01302258A (en) | 1989-12-06 |
Family
ID=15079955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62132377A Pending JPH01302258A (en) | 1987-05-28 | 1987-05-28 | Method for forming secondary photographic original for printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01302258A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428159A (en) * | 1977-08-03 | 1979-03-02 | Rca Corp | Method of manufacturing diffraction decolorizing type push original print and device used therefor |
| JPS561940A (en) * | 1979-06-21 | 1981-01-10 | Toppan Printing Co Ltd | Photographing method |
-
1987
- 1987-05-28 JP JP62132377A patent/JPH01302258A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428159A (en) * | 1977-08-03 | 1979-03-02 | Rca Corp | Method of manufacturing diffraction decolorizing type push original print and device used therefor |
| JPS561940A (en) * | 1979-06-21 | 1981-01-10 | Toppan Printing Co Ltd | Photographing method |
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