Practical Techniques for Book Printing
Time:2025-09-03
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Printing technology includes pre press, printing, post press processing, and shipping, and has developed into a major field and industry. Whether it is monochrome printing or color printing, the operator must frequently compare the printed product with the sample, correct it in a timely manner, and ensure the quality of the printed product. There are some practical techniques worth learning when printing samples:
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The strength of light directly affects the judgment of color
The strength of light not only affects the brightness of colors, but also changes the appearance of colors. The same object is a normal color under standard light sources. If the light gradually becomes stronger, its color tone also changes to a bright hue. When the brightness increases to a certain extent, any color can become white. So when looking at the sample, the timeline must meet the requirements in order to correctly identify the color.
The difference in appearance between colored light and sunlight
In actual production, most of them work under the illumination of a power source, and each light source has a certain color. This brings certain difficulties to correctly judge color. In the printing workshop, fluorescent lamps with high color temperature (3500-4100K) and good color rendering coefficient are generally selected as the sample light source. Please note that fluorescent lamps generally have a slight bluish purple tint.
Whether to look at the sample first or the printed product first, the results are slightly different
Looking at one color twice feels different. This phenomenon is called sequential color contrast reaction. This reaction, combined with the hue of the new color, forms a new color, so the color is changed when viewed later. And the change in hue still follows a pattern, changing towards the complementary color of the color first.
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The above three are common problems and techniques when viewing printed samples. Everyone should pay more attention when viewing samples in order to ensure the stability and improvement of the quality of printed products.
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