JPH01202641A - Method and apparatus for quantitatively measuring material existing on printing plate of lithographic printing block - Google Patents
Method and apparatus for quantitatively measuring material existing on printing plate of lithographic printing blockInfo
- Publication number
- JPH01202641A JPH01202641A JP2844888A JP2844888A JPH01202641A JP H01202641 A JPH01202641 A JP H01202641A JP 2844888 A JP2844888 A JP 2844888A JP 2844888 A JP2844888 A JP 2844888A JP H01202641 A JPH01202641 A JP H01202641A
- Authority
- JP
- Japan
- Prior art keywords
- light
- printing plate
- plate surface
- lithographic printing
- plate
- 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
- 238000007639 printing Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims description 28
- 239000000463 material Substances 0.000 title abstract 5
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims description 40
- 230000003287 optical effect Effects 0.000 claims description 11
- 230000003595 spectral effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 30
- 238000002835 absorbance Methods 0.000 abstract description 19
- 229910052736 halogen Inorganic materials 0.000 abstract description 3
- 150000002367 halogens Chemical class 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000000691 measurement method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000866 electrolytic etching Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
- G01N21/474—Details of optical heads therefor, e.g. using optical fibres
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、平版印刷版の版面上に存在する物質を定量的
に計測する方法及び装置に関し、更に詳しくは印刷中の
平版印刷版の版面上に存在する物質、例えばインキ、ガ
ム、湿し水などを定量的に計測する方法及び装置に関す
る。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method and apparatus for quantitatively measuring substances present on the plate surface of a lithographic printing plate, and more specifically to a method and apparatus for quantitatively measuring substances present on the plate surface of a lithographic printing plate during printing. The present invention relates to a method and apparatus for quantitatively measuring substances present on the surface, such as ink, gum, dampening water, etc.
（従来技術）
平版印刷装置で達成される印刷物の品質は、版面におけ
る湿し水とインキの量及び比率に大きく影響するため、
それらを正確に管理する必要がある。オペレーターはこ
れらの管理を、版面の目視観察による版面からの反射光
量や、印刷物の刷り上がり状態から経験的に行っており
、これらは多くの熟練を必要としな。(Prior Art) The quality of printed matter achieved with a lithographic printing device is greatly influenced by the amount and ratio of dampening water and ink on the plate surface.
They need to be managed accurately. Operators manage these processes empirically based on visual observation of the plate surface, the amount of light reflected from the plate surface, and the state of printed matter, and this does not require a great deal of skill.
そのため、このような方法ではオペレーターの個人差が
必然的に生じてしまい、印刷物の品質の変動は避けるこ
とができなかった。このようなオペレーターの個人差に
よる印刷物の品質上の差を減少させるためには、インキ
と湿し水の量を正確に測定する装置が必要である。この
ような測定装置は又、印刷機の自動制御に加えて刷版現
象、例えば印刷版の非画像部の汚れ発生のメカニズムの
解析などの研究手段としても役立つものである。Therefore, with this method, individual differences among operators inevitably occur, and variations in the quality of printed matter cannot be avoided. In order to reduce such differences in the quality of printed matter due to individual differences among operators, a device that accurately measures the amounts of ink and dampening water is required. In addition to the automatic control of printing presses, such a measuring device is also useful as a research tool for analyzing printing plate phenomena, for example the mechanism of staining in non-image areas of printing plates.
この種の測定方法としては、印刷機の版面以外のローラ
ー面上の湿し水やインキ等の量を赤外線の反射光から測
定する方法が、西ドイツ特許出願公告第２４１２２３４
号明細書、特開昭６１−１４８０６１号公報、日本印刷
学会論文気第２２巻−第３号（１９８５）第１２５ペー
ジに記載されている。As a measuring method of this kind, a method of measuring the amount of dampening water, ink, etc. on a roller surface other than the plate surface of a printing press from reflected infrared light is disclosed in West German Patent Application Publication No. 2412234.
No. specification, Japanese Patent Application Laid-open No. 148061/1983, Japan Printing Society Papers Vol. 22-No. 3 (1985), page 125.
印刷機上の版面上の物質量を直接に測定する方法は、特
開昭６０−１９６３４９号、同６１−８９０４８号公報
、日本化学会績 「新実験化学講座４、基礎技術３」第
４０１ページ等に記載されている。Methods for directly measuring the amount of substances on the plate surface of a printing press are disclosed in Japanese Patent Application Laid-Open Nos. 60-196349 and 61-89048, Chemical Society of Japan, New Experimental Chemistry Course 4, Basic Technology 3, page 401. It is described in etc.
（発明が解決しようとする問題点）
これらの検出方法においては印刷中の版面上の測定にお
いてローラーの回転による風等のために測定値が変動し
たり、版面上の水分量が多くなると、検出器が光軸上に
設置されているため検出器においては水面での反射光の
影響が表れ、吸光度と水分量は非線形の関係になってし
まい、定量性に欠け、表面物質の絶対量を正確に測定で
きないという欠点があった。(Problems to be Solved by the Invention) In these detection methods, when measuring on the printing plate during printing, if the measured value fluctuates due to wind caused by the rotation of the roller, or if the amount of moisture on the printing plate increases, the detection Because the detector is placed on the optical axis, the detector is affected by the light reflected from the water surface, resulting in a nonlinear relationship between absorbance and water content, which lacks quantitative properties and makes it difficult to accurately determine the absolute amount of surface substances. The disadvantage was that it could not be measured.
（発明の目的）
本発明は上記の点を考慮してなされたもので、従って本
発明の目的は、平版印刷版の版面上に存在する物質の定
量的な計測方法において、物質量の増加に伴い吸光度が
単純に増加するデータが得られるような計測方法及び装
置を提供することである。(Object of the Invention) The present invention has been made in consideration of the above points, and therefore, an object of the present invention is to provide a method for quantitatively measuring substances present on the plate surface of a lithographic printing plate. It is an object of the present invention to provide a measurement method and apparatus that can obtain data in which the absorbance simply increases accordingly.
更に本発明の別の目的は、印刷機を運転状態に保持した
ままで、平版印刷版の版面上に存在する物質の定量的な
計測方法において、物質量の増加に伴い吸光度が単純に
増加するデータが得られるような計測方法及び装置を提
供することである。Another object of the present invention is to provide a method for quantitatively measuring substances present on the plate surface of a lithographic printing plate while the printing press is kept in operation, in which the absorbance simply increases as the amount of the substance increases. It is an object of the present invention to provide a measurement method and apparatus that allow data to be obtained.
（問題を解決するための手段）
上記目的は、印刷中の平版印刷版の版面上に存在する物
質を定量的に計測する方法において、光源の光を測定さ
れる版面に垂直に照射し、その照射によって版面から乱
反射した光のみを集光し、その集光した光のうち被測定
物質の吸収帯の波長の光を検出するようにしたことを特
徴とする平版印刷版の版面上に存在する物質の定量的計
測方法及び装置により達成された。(Means for solving the problem) The above purpose is a method for quantitatively measuring substances present on the plate surface of a lithographic printing plate during printing. Existing on the plate surface of a lithographic printing plate characterized by condensing only the light diffusely reflected from the plate surface by irradiation, and detecting the light having a wavelength in the absorption band of the substance to be measured from among the condensed light. This was achieved using a method and device for quantitatively measuring substances.
（発明の詳細な説明）
以下添付図面を参照して本発明の内容について説明する
。(Detailed Description of the Invention) The content of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明における計測方法の原理を示した概念図
である。すなわち、光源１から照射された光は測定され
る平版印刷版の版面に照射光が垂直に当たるように設置
された光導波管２を通り平版印刷版の版面３に照射され
、凹面鏡４により粗面である版面からの乱反射光が集光
され、集光された光を検出器５で検出する。FIG. 1 is a conceptual diagram showing the principle of the measurement method according to the present invention. That is, light irradiated from a light source 1 passes through an optical waveguide 2 installed so that the irradiated light hits the plate surface of the lithographic printing plate to be measured perpendicularly, and is irradiated onto the plate surface 3 of the lithographic printing plate. The diffusely reflected light from the plate surface is focused, and the focused light is detected by a detector 5.
特開昭６１−１４８０６１号公報、日本印刷学会論文気
第２２巻第３号（１９８５）第１２５ページには、金属
ローラー上のインキ及び湿し水が混合している液層に光
源から金属ローラーに対し適当な角度で照射された光の
正反射光を検出し、この正反射光量から湿し水及びイン
キ量を検出する方法が開示されている。しかしながら、
本発明が対象とする版面のような粗面上の物質の測定に
間する技術は開示されていない。JP-A No. 61-148061, Papers of the Japan Society of Printing, Vol. 22, No. 3 (1985), page 125, describes how a liquid layer containing ink and dampening water on a metal roller is exposed to a metal roller from a light source. A method is disclosed in which specularly reflected light of light irradiated at an appropriate angle is detected, and the amounts of dampening water and ink are detected from the amount of specularly reflected light. however,
No technique has been disclosed for measuring substances on rough surfaces such as printing plates, which is the object of the present invention.
特開昭６０−１９６３４９号公報においては、印刷中の
平版印刷版の版面位置をバーコードとバーコード位置検
出器で検出し、コンピューターコントロールされた高感
度、高速レスポンスの黒体積分球型センサーにより、版
面上の湿し水、インキなどの物質の量を計測する装置が
提案されている。しかし、黒体積分球センサーを版面近
くに設置するため印刷においてローラー等が回転するこ
とによって生じる風及び温度、湿度等で表面物質の絶対
量を安定に、かつ正確に測定できなかった。In JP-A No. 60-196349, the surface position of the lithographic printing plate during printing is detected using a bar code and a bar code position detector, and a computer-controlled high-sensitivity, high-speed response black volume sphere type sensor is used to detect the surface position of the lithographic printing plate during printing. , devices have been proposed that measure the amount of substances such as dampening water and ink on the printing plate. However, because the black volume sphere sensor is installed near the plate surface, it was not possible to stably and accurately measure the absolute amount of surface matter due to the wind, temperature, humidity, etc. generated by the rotation of rollers during printing.
特開昭６１−８９０４８号公報に記載された方法におい
ては、光源から版面に対し適当な角度で照射された光を
正反射光と版面に垂直な方向に反射した乱反射光を各別
に検出し、この乱反射光量を参照値として正反射光量を
補正することで湿し水量を検出する方法が採られている
。しかし、反射光は、表面における正反射光と、表面及
び内部からの拡散反射光からなっており角度分布を有す
るために、反射光に対しである特定の角度で測定する場
合には、試料面に対する照射角、試料の位置、試料の厚
さなどが僅かに変化しても測定結果が変わってしまい、
精度よい測定を行うことは非常に困難であった。In the method described in Japanese Patent Application Laid-Open No. 61-89048, specular reflection light and diffuse reflection light reflected in a direction perpendicular to the plate surface are separately detected from light irradiated from a light source to the plate surface at an appropriate angle, A method is adopted in which the amount of dampening water is detected by correcting the amount of specularly reflected light using the amount of diffusely reflected light as a reference value. However, reflected light consists of specular reflection light on the surface and diffuse reflection light from the surface and inside, and has an angular distribution. Even slight changes in the irradiation angle, sample position, sample thickness, etc. will change the measurement results.
It was extremely difficult to make accurate measurements.
本発明では、版面上の被測定物質の表面での正反射光は
測定面に垂直にあたるようにした光源、又は光導波管に
戻るようにし、この正反射光を除いた乱反射光のうち被
測定物質の吸収帯の波長の光、即ち、被測定物質が有す
る固有の吸収波長範囲内の特定波長の光を検出し表面物
質の定量を行っているため、物質量の増加に伴い吸光度
が単純に増加するデータが得られる。In the present invention, the specularly reflected light from the surface of the substance to be measured on the printing plate is returned to a light source or optical waveguide that is perpendicular to the measurement surface, and the diffusely reflected light excluding this specularly reflected light is subject to measurement. Since surface substances are quantified by detecting light at a wavelength in the absorption band of the substance, that is, light at a specific wavelength within the absorption wavelength range unique to the substance being measured, the absorbance simply increases as the amount of substance increases. You get more and more data.
本発明で使用される光源としては、被測定物質が有する
固有の吸収波長範囲内の波長を含む光を発光する光源で
あれば良い、好ましくは、赤外線発光体く例えば、ハロ
ゲンランプ）である、ここで、検出する光は被測定物質
に対応した光に分光する必要がある。これは、被測定物
質中の特に赤外吸収の大きな化学構造（伸縮、変角、は
さみ、面外、骨格、横ゆれなどの振動を生ずる化学構造
）に着目して、その振動に基づく赤外光エネルギーの吸
収から膜厚等の物理量を知るためである。光源は被測定
物質に対応する波長の光を発することができればレーザ
ー光（例えば、炭酸ガスレーザー）でもよくこの場合は
、分光の必要はない０分光は、被測定物質に対応した光
に分光してから測定面に照射するか、全波長を照射して
乱反射光を検出する前で分光してもよい、好ましいのは
、赤外線発光体から照射された光を、検出器に入る前に
おいて干渉フィルターを通過させる態様である。The light source used in the present invention may be any light source that emits light having a wavelength within the absorption wavelength range inherent to the substance to be measured, and is preferably an infrared light emitter (e.g., a halogen lamp). Here, the light to be detected needs to be separated into lights corresponding to the substance to be measured. This method focuses on chemical structures in the substance to be measured that have particularly large infrared absorption (chemical structures that cause vibrations such as stretching, bending, scissoring, out-of-plane, skeleton, and lateral vibration), and uses infrared radiation based on those vibrations. This is to determine physical quantities such as film thickness from the absorption of light energy. The light source may be a laser beam (for example, a carbon dioxide laser) as long as it can emit light with a wavelength corresponding to the substance to be measured. In this case, there is no need for spectroscopy. The light emitted from the infrared emitter may be irradiated onto the measurement surface after the irradiation, or the spectroscopy may be performed before irradiating all wavelengths and detecting the diffusely reflected light.It is preferable to pass the light irradiated from the infrared emitter through an interference filter before it enters the detector. This is a form of passing the .
干渉フィルターとしては、赤外線フィルター、それぞれ
の被測定物質の吸収波長域にカットするフィルター等が
用いられる。ところで、水は、２６９６μ、４．８０μ
、８．１０μ等に吸収を持ち、インキは、３．４０μ、
５．４０μ、６．８５μ等に吸収を持つ、その他ガムな
どもそれぞれの種類と組成に応じて特有の赤外吸収域が
存在する。As the interference filter, an infrared filter, a filter that cuts into the absorption wavelength range of each substance to be measured, or the like is used. By the way, water is 2696μ, 4.80μ
, 8.10μ, etc., and the ink has absorption at 3.40μ, etc.
Other gums and the like that have absorption at 5.40μ, 6.85μ, etc. also have their own unique infrared absorption ranges depending on their type and composition.
本発明においては、照射光は版面に対して実質的に垂直
に光が当たるようにする。レーザー光であるときは、測
定される版面に対して垂直に設定すればたりる。光源か
らの光が平行光でない場合は先導波管等を用い測定され
る版面に対して実質的に垂直に光が当たるように設定す
ることが好ましい、光導波管を版面近くまで伸ばすよう
に、設定することが好ましい、これにより水表面での正
反射光は再び光源方向に戻るため水表面での正反射光は
検出器には受光されない、また光導波管を用いると、光
源の印刷時に起きる風等の影響を受けないようにするこ
とができる点でも好ましい。In the present invention, the irradiation light is made to strike the printing plate substantially perpendicularly. If the laser beam is used, it can be set perpendicular to the plate surface to be measured. If the light from the light source is not parallel, it is preferable to use a leading wave tube or the like to set the light to fall substantially perpendicular to the plate surface to be measured, such as by extending the optical waveguide close to the plate surface. This setting allows the specularly reflected light on the water surface to return to the direction of the light source, so that the specularly reflected light on the water surface is not received by the detector.Also, when using an optical waveguide, it will not occur when printing the light source. It is also preferable in that it can be prevented from being affected by wind and the like.
光導波管に関しては特開昭６１−１４８０６１号公報等
に記載されているものも使用できる。As for the optical waveguide, those described in Japanese Patent Application Laid-open No. 148061/1983 can also be used.
照射光は粗面である版面により乱反射する１本発明では
この乱反射光を集光する。乱反射した光を集光する方法
としては、凹面鏡により集光することが好ましい、凹面
鏡は測定面から乱反射されるすべての乱反射光を集光で
きるだけの大きさであればよい、集光の際、更にレンズ
を使用することが好ましい、積分球を用い試料からの反
射光のうち正反射光を除き、反射角に関係なく積分球内
面で一様に多重反射させ、その一部を測定することによ
り拡散反射光の反射角による影響なしに測定する方法が
提案されている（日本化学会間 「新実験化学講座４、
基礎技術３」 第４０１ページ）、シかし、この方法で
は積分球を十分測定面に近付ける必要があり、印刷機に
取り付けて印刷中の版面上の物質を測定する場合におい
ては、版面近くには印刷において発生するインキ、湿し
水やガムなどの微かな粒子が舞い、この粒子による拡散
反射光の影響も受ける上、積分球が汚染されることもあ
るため、積分球等を近付けるのは、長期間での安定性を
低下させる０本発明では、測定面から離れたところで乱
反射した光を凹面鏡で集光するため、このような欠点を
解消している。ここで測定される平版印刷版の版面は乱
反射光を得るために粗面でなければならないが、一般に
平版印刷版の版面は、ブラシグレイン、電解エッチやケ
ミカルエッチ等で粗面化されている。The irradiated light is diffusely reflected by the rough plate surface, and in the present invention, this diffusely reflected light is collected. As a method for condensing the diffusely reflected light, it is preferable to condense the light using a concave mirror.The concave mirror only needs to be large enough to condense all the diffusely reflected light that is diffusely reflected from the measurement surface. It is preferable to use a lens.Using an integrating sphere, the specularly reflected light from the reflected light from the sample is removed, uniformly multiple reflected on the inner surface of the integrating sphere regardless of the reflection angle, and a part of it is measured. A method for measuring without being affected by the reflection angle of reflected light has been proposed (Chemical Society of Japan, New Experimental Chemistry Course 4,
However, in this method, it is necessary to place the integrating sphere sufficiently close to the measurement surface, and when it is attached to a printing press to measure substances on the plate surface during printing, it is necessary to place the integrating sphere close to the plate surface. minute particles of ink, dampening water, gum, etc. generated during printing fly around, and these particles are also affected by diffusely reflected light, and the integrating sphere may become contaminated, so it is best not to bring an integrating sphere, etc. , which reduces long-term stability.The present invention eliminates these drawbacks by condensing the diffusely reflected light away from the measurement surface using a concave mirror. The plate surface of the lithographic printing plate to be measured here must be a rough surface in order to obtain diffusely reflected light, but the plate surface of the lithographic printing plate is generally roughened by brush grain, electrolytic etching, chemical etching, or the like.
本発明において、集光された光を、検出器等で検出する
８本発明の検出器には、光電素子が使われるのが好まし
い、゛その後、電気信号に変換され増幅器、Ａ／Ｄ変換
器、計算機等によって適当な信号処理を行って所望の形
式のデーターに変換されブロック−等により測定値が表
示されるようにしてもよい、更にこれらの計算値はＤ／
Ａ変換器を経てインキ量調節装置、湿し水調節装置へ制
御信号が送られ、同各モーターの回転数を制御しそれぞ
れの量を調節するようにしてもよい。In the present invention, it is preferable that a photoelectric element is used in the detector of the present invention, in which the collected light is detected by a detector or the like. ゛Then, it is converted into an electrical signal and sent to an amplifier, an A/D converter, etc. The measured values may be converted into data in a desired format by performing appropriate signal processing using a computer, etc., and then displayed using a block, etc. Furthermore, these calculated values may be displayed in the D/
A control signal may be sent to the ink amount adjusting device and the dampening water adjusting device via the A converter to control the rotational speed of each motor and adjust the respective amounts.
（発明の効果）
本発明の平版印刷版の版面上に存在する物質の定量的な
計測方法において、印刷機を運転状態に保持したままで
、物質量の増加に伴い吸光度が単純に増加するデータが
得られ、版面上の物質量を定量することができ、熟練オ
ペレーターでなくとも湿し水やインキの量を正確に管理
できる。(Effect of the invention) In the method for quantitatively measuring substances present on the plate surface of a lithographic printing plate of the present invention, data shows that the absorbance simply increases as the amount of substances increases while the printing press is kept in operation. It is possible to quantify the amount of substances on the plate surface, and even non-skilled operators can accurately control the amount of dampening water and ink.
実施例１ 以下、実施例を示し、本発明を更に説明する。Example 1 EXAMPLES Hereinafter, the present invention will be further explained with reference to Examples.
第２区は、装置の正面図で、第３図は側面図である。ハ
ロゲンランプ光源６から照射された光を光導波管７を用
いて版面８上垂直にに照射させる。The second section is a front view of the device, and FIG. 3 is a side view. Light emitted from a halogen lamp light source 6 is irradiated vertically onto a printing plate 8 using an optical waveguide 7.
照射された光は粗面である版面で正反射及び乱反射し、
表面物質による正反射光は、光導波管に戻り、乱反射光
が凹面鏡９で電光され、レンズ１０にて更に電光され、
鏡１１で向きを変え干渉フィルター１２にて水の吸収波
長２．９６．に分光され検出器１３に入る。検出器とし
ては高Ｓ度、高応答性の半導体検出器ＨＣＴ （ＨｇＣ
ｄＴ ｅ）が使用されている。この装置を用い、市販の
２８版を製版処理して得た平版印刷版における非画像部
の水分量と吸光度の関係を調べた。実際の版面上の水分
量は、スポンジで版面上に塗布した重量を天びんで測定
した。その時の水分量と検出した吸光度との関係を第４
図に示した。このように、水分量が増加すると吸光度は
単純に増加するデータが得られた。The irradiated light is reflected regularly and diffusely on the rough plate surface,
The specularly reflected light from the surface substance returns to the optical waveguide, and the diffusely reflected light is illuminated by a concave mirror 9 and further illuminated by a lens 10.
The direction is changed by the mirror 11 and the absorption wavelength of water is 2.96 by the interference filter 12. The light is separated into spectra and enters the detector 13. The detector is a high S degree, high response semiconductor detector HCT (HgC
dT e) is used. Using this apparatus, the relationship between the moisture content and absorbance of the non-image area of a lithographic printing plate obtained by plate-making processing of commercially available 28 plates was investigated. The actual moisture content on the plate surface was measured by weighing the amount applied to the plate surface with a sponge using a balance. The relationship between the moisture content and the detected absorbance at that time is
Shown in the figure. In this way, data was obtained in which the absorbance simply increases as the water content increases.
比較例
特開昭６１−１４８０６１号公報に記載の装置を版面上
の物質測定に使用して実施例１と同様に湿し水量に対応
する吸光度を測定した。その結果を第５図に示した。こ
れにてわかるように、湿し水量が多くなると吸光度が低
下してしまう領域が現れ、湿し水量を特定することがで
きなかった。Comparative Example The absorbance corresponding to the amount of dampening water was measured in the same manner as in Example 1 using the apparatus described in JP-A-61-148061 for measuring substances on the printing plate. The results are shown in FIG. As can be seen, as the amount of dampening water increases, a region appears where the absorbance decreases, making it impossible to determine the amount of dampening water.
実施例２
実施例１の装置を印刷機に取り付けて印刷中の版面に関
し、版面非画像部の水分量の変動を測定した。実施例１
の装置を特開昭６０−１９３４９号公報の実施例１に記
載されている計測装置の照射から検出器までの装置と置
き換えたこと以外は同じである計測装置で印刷中の湿し
水量の測定を行った。Example 2 The apparatus of Example 1 was attached to a printing press, and the variation in moisture content in the non-image area of the plate was measured during printing. Example 1
Measuring the amount of dampening water during printing using the same measuring device except that the device from irradiation to the detector described in Example 1 of JP-A-60-19349 was replaced. I did it.
ハマダスターオフセット印刷機に製版済みの平版印刷版
を取り付け、印刷中の版面の湿し水量を湿し水調節目盛
りで変動させ、この変動に伴う吸光度を測定し、第６図
に示すデータを得た。グラフよりわかるように、湿し水
量を多くすると吸光度が単純に増加しており、実施例１
により得られた検量線より吸光度から湿し水量を換算で
きるデータが得られた。A prepared lithographic printing plate was attached to the Hamada Star offset printing machine, and the amount of dampening water on the plate surface during printing was varied using the dampening water adjustment scale. The absorbance accompanying this variation was measured, and the data shown in Figure 6 was obtained. Ta. As can be seen from the graph, the absorbance simply increases when the amount of dampening water is increased, and Example 1
From the calibration curve obtained, data that can be used to convert the amount of dampening water from the absorbance was obtained.
第１図は、本発明の計測方法の原理を示した概念図であ
り、第２図は、本発明の装置構成例の正面図であり、第
３図は、そのｍ１面図であり、第４図は、本発明によっ
て測定された平版印刷版の版面上の湿し水量と吸光度と
の関係を示した図であり、第５図は、従来の装置を用い
て測定した平版印刷版の版面上の湿し水量と吸光度との
関係を示した図であり、第６図は、本発明によって測定
された印刷中の平版印刷版の版面上の湿し水量を調節す
る湿し水調節目盛りと吸光度との関係を示した図である
。
１、光源
２、光導波管
３、版面
４、凹面鏡
５、検出器
特許出願人 富士写真フィルム株式会社第１図
第２図 第３図
＠４図FIG. 1 is a conceptual diagram showing the principle of the measuring method of the present invention, FIG. 2 is a front view of an example of the device configuration of the present invention, and FIG. Figure 4 is a diagram showing the relationship between the amount of dampening water on the plate surface of a lithographic printing plate measured by the present invention and the absorbance, and Figure 5 is a diagram showing the relationship between the absorbance and the amount of dampening water on the plate surface of a lithographic printing plate measured using a conventional device. FIG. 6 is a diagram showing the relationship between the amount of dampening water and the absorbance, and FIG. FIG. 3 is a diagram showing the relationship with absorbance. 1, light source 2, optical waveguide 3, printing plate 4, concave mirror 5, detector Patent applicant Fuji Photo Film Co., Ltd. Figure 1 Figure 2 Figure 3 @ Figure 4
Claims (3)
測する方法において、光源からの光を該版面に垂直に照
射し、その照射によって該版面から乱反射した光を集光
し、その集光した光のうち該物質の吸収帯の波長の光を
検出するようにしたことを特徴とする平版印刷版の版面
上に存在する物質の定量的計測方法。(1) In a method for quantitatively measuring substances present on the plate surface of a lithographic printing plate, light from a light source is irradiated perpendicularly to the plate surface, and the light that is diffusely reflected from the plate surface due to the irradiation is collected. 1. A method for quantitatively measuring a substance present on a plate surface of a lithographic printing plate, comprising detecting light having a wavelength in an absorption band of the substance out of the collected light.
測する方法において、光源から光を光導波管を通して該
版面に照射し、その照射によって乱反射した光を集光し
、その集光した光のうち該物質の吸収帯の波長の光を検
出するようにしたことを特徴とする平版印刷版の版面上
に存在する物質の定量的計測方法。(2) In a method for quantitatively measuring substances present on the plate surface of a lithographic printing plate, light from a light source is irradiated onto the plate surface through an optical waveguide, and the light that is diffusely reflected by the irradiation is collected. 1. A method for quantitatively measuring a substance present on a plate surface of a lithographic printing plate, the method comprising detecting light having a wavelength in an absorption band of the substance.
の版面に垂直に照射すべく設置された光導波管、版面か
ら乱反射した光を集光する凹面鏡、分光フィルター及び
集光された光を検出する手段を備えた印刷中の平版印刷
版の版面上に存在する物質の定量的計測装置。(3) At least a light source, an optical waveguide installed to irradiate the light from the light source perpendicularly to the plate surface of the lithographic printing plate, a concave mirror that collects the light diffusely reflected from the plate surface, a spectral filter, and the collected light. A device for quantitatively measuring substances present on the plate surface of a lithographic printing plate during printing, which is equipped with a means for detecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2844888A JPH01202641A (en) | 1988-02-09 | 1988-02-09 | Method and apparatus for quantitatively measuring material existing on printing plate of lithographic printing block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2844888A JPH01202641A (en) | 1988-02-09 | 1988-02-09 | Method and apparatus for quantitatively measuring material existing on printing plate of lithographic printing block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01202641A true JPH01202641A (en) | 1989-08-15 |
Family
ID=12248954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2844888A Pending JPH01202641A (en) | 1988-02-09 | 1988-02-09 | Method and apparatus for quantitatively measuring material existing on printing plate of lithographic printing block |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01202641A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2874262A1 (en) * | 2004-08-10 | 2006-02-17 | Colordimensions Sarl | MEASUREMENT SYSTEM FOR THE OPIQUE CHARACTERIZATION OF MATERIALS AND METHOD OF MEASUREMENT IMPLEMENTED BY SAID SYSTEM. |
| JP2012032240A (en) * | 2010-07-29 | 2012-02-16 | Shimadzu Corp | Diffuse reflection measuring equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56108940A (en) * | 1980-02-04 | 1981-08-28 | Itouman Kk | Measuring device utilizing near infrared ray absorption |
| JPS60214241A (en) * | 1984-04-11 | 1985-10-26 | Hitachi Ltd | Device for measuring infrared absorption spectrum |
| JPS6166147A (en) * | 1984-09-04 | 1986-04-04 | イ−ストマン コダック カンパニ− | Reflector having integrated void having improved efficiency |
-
1988
- 1988-02-09 JP JP2844888A patent/JPH01202641A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56108940A (en) * | 1980-02-04 | 1981-08-28 | Itouman Kk | Measuring device utilizing near infrared ray absorption |
| JPS60214241A (en) * | 1984-04-11 | 1985-10-26 | Hitachi Ltd | Device for measuring infrared absorption spectrum |
| JPS6166147A (en) * | 1984-09-04 | 1986-04-04 | イ−ストマン コダック カンパニ− | Reflector having integrated void having improved efficiency |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2874262A1 (en) * | 2004-08-10 | 2006-02-17 | Colordimensions Sarl | MEASUREMENT SYSTEM FOR THE OPIQUE CHARACTERIZATION OF MATERIALS AND METHOD OF MEASUREMENT IMPLEMENTED BY SAID SYSTEM. |
| WO2006018588A1 (en) * | 2004-08-10 | 2006-02-23 | Colordimensions | Measuring system for optically characterising materials and method of measurement used by said system |
| JP2012032240A (en) * | 2010-07-29 | 2012-02-16 | Shimadzu Corp | Diffuse reflection measuring equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6832550B2 (en) | Ink and dampening solution determination in offset printing | |
| US4302108A (en) | Detection of subsurface defects by reflection interference | |
| ATE245279T1 (en) | METHOD AND DEVICE FOR MULTISPECTRAL ANALYSIS IN NON-INVASIVE INFRARED SPECTROSCOPY | |
| GB1595934A (en) | Analysis of liquid samples | |
| FR2556283A1 (en) | METHOD FOR CONTROLLING INK-WATER BALANCE IN A LITHOGRAPHIC PRINTING PRESS | |
| GB2083215A (en) | Apparatus for x-ray diffraction | |
| JPS5987307A (en) | Measuring device of thickness of surface film | |
| US6281498B1 (en) | Infrared measuring gauges | |
| JPH03252512A (en) | Method and device for on-line measurement of oil film or coated film | |
| EP0075171A1 (en) | Apparatus and process for analytical and diagnostic purposes | |
| JPH01202641A (en) | Method and apparatus for quantitatively measuring material existing on printing plate of lithographic printing block | |
| JPH11237377A (en) | Apparatus for measuring quality of paper or sheet | |
| US5506407A (en) | High resolution high speed film measuring apparatus and method | |
| GB2062219A (en) | Contactless measurement for substance concentration | |
| EP0344694A2 (en) | Method of monitoring and controlling retention of chemicals in processed water/cellulose matrix | |
| JPH0915392A (en) | X-ray analyzer | |
| JPH0798396B2 (en) | Automatic control method for quantitative balance of ink and fountain solution in offset printing machine | |
| KR100205532B1 (en) | Moisture measuring apparatus | |
| JPH0411804B2 (en) | ||
| JPS60196349A (en) | Instrumentation equipment of state of lithographic plate surface during printing | |
| JPH03194450A (en) | Ink water content measuring instrument | |
| JP3272471B2 (en) | Concentration measuring device | |
| JP2560927B2 (en) | Method for measuring thickness distribution of layers constituting laminated body | |
| JPH05119000A (en) | Fluorescent x-ray analyzing device | |
| JP3840503B2 (en) | X-ray analysis method and apparatus |