Plain Sticker Paper film different color plate quick identification method

Plain Sticker Paper film different color plate quick identification method

First, the hierarchical differentiation method

For black and yellow, this method is very useful. Generally speaking, in the four-color version, the black version is mostly copied in a short tone, so the layers are very few and easy to recognize; Because in most of the works, the yellow component is relatively heavy, so it looks like the yellow version of the level is very full, very paste, but also easier to recognize. The magenta version and the green version, the level is similar, if there is no experience in color separation, it is often easy to confuse with this method.

Second, the characteristic color separation method

Generally experienced prepress workers use this method to distinguish. Because it conforms to the principle of color separation, it is very accurate to use. We know that after the separation of filtered color plates, various color plates have their basic colors and opposite colors. For example, the magenta version, its basic colors are magenta, red, blue-purple and black, and the opposite colors are yellow, blue, green and white.

Therefore, all red, blue-purple and magenta should have a deep black on the magenta color separation film. We can find some related characteristic colors, such as the red flag, the red seal, the lips of the figure, etc., these parts should be dark on the magenta version, and the green version is light. On the contrary, some sky, sea, forests, etc., are light on magenta, and dark on cyan.

Three, Angle differentiation method

This is seen from the Angle of film separation with the aid of a magnifying glass. Generally speaking, the Angle of the yellow version is always 90°. This is taking into account the characteristics of the weak color version to carry out the Angle arrangement. Magenta, green, black because it is a strong color version, so must avoid the occurrence of moire, mostly with 45° difference of 30° Angle difference to arrange, that is, 15°, 45°, 75°.

The Angle of the strong color plate can be determined according to the characteristics of the original manuscript, and there is no fixed Angle. The yellow is a weak color version, even if there is turtle pattern, the human eye is not easy to observe. For square and circular dots, the worst Angle is given when a fourth ideal Angle can no longer be arranged in a quadrant. Therefore, its Angle is arranged at 90°. Note that since the Angle arrangement of the chain point is 0 to 180°, it is a different matter for the chain point.

Fourth, the mesh flower differentiation method

If there is a proof, you can also use the proof to distinguish the mesh flower. Put a color separation film on the proof, slightly turn an Angle, there will be some web flowers with color in the tone area, that is, turtle grain. If there is a magenta flower, the film is a magenta version; If it is cyan web flower, it is a blue version. Why is that?

We know that when the Angle difference between the two kinds of dots is smaller, the generated square pattern is larger and more obvious. When a monochrome film is placed on the sample, its Angle is the same as the Angle of the color in the four-color sample, the film slightly turns an Angle, the film and the color in the color of the four-color sample Angle difference is very small, this small Angle difference is easy to generate an obvious color net flower.

This will help us easily identify the color of the film. In summary, we can summarize the quick and effective method of distinguishing different color plates.