印刷看樣是印刷操作過程中用于檢查和控制印刷質(zhì)量的常用方法，無論是單色印刷還是彩色印刷，印刷過程中，操作者都必須經(jīng)常利用自己的雙眼將印品與樣張反復(fù)比較，以找出將印品與樣張的差別，及時校正，確保印刷產(chǎn)品質(zhì)量。下面濟(jì)南彩色設(shè)計(jì)印刷廠家為你講解一個問題：印刷看樣時需要關(guān)注什么地方？

Printing sample checking is a common method used to check and control the printing quality during the printing operation. Whether it is monochrome printing or color printing, the operator must often use his eyes to repeatedly compare the print with the sample in order to find out the difference between the print and the sample, and correct it in time to ensure the quality of the printed product. Next, Jinan Color Design and Printing Factory will explain a question to you: What should we pay attention to when printing samples?

光的強(qiáng)弱

Intensity of light

光的強(qiáng)弱直接影響到對印品樣張顏色的判斷，光的強(qiáng)弱不僅對色彩的明暗有影響，還會改變顏色的相貌。平時我們觀察一個受光的圓柱，迎光的一面為明調(diào)，背光的面為暗調(diào)。明暗的結(jié)合部分為是中間調(diào)。

The intensity of light directly affects the judgment of the color of the printed sample. The intensity of light not only affects the brightness of the color, but also changes the appearance of the color. Usually we observe a light-receiving cylinder. The light facing side is bright and the backlight side is dark. The combination of light and dark is the middle tone.

同一物體，在標(biāo)準(zhǔn)光源下是正色，若光線逐漸變強(qiáng)，其色調(diào)也隨之向明亮的色相轉(zhuǎn)變，光亮增強(qiáng)到一定程度，任何顏色都可以變?yōu)榘咨：谏拇善髌浞垂恻c(diǎn)也是白色的，因反光點(diǎn)處光集中，并強(qiáng)烈地反射。同理，光線逐漸減，各種色彩向明度低的色相轉(zhuǎn)變，光減弱到一定程度，任何顏色都會變成黑色，因物體不反射任何光就是黑色的。

The same object is a positive color under the standard light source. If the light becomes stronger gradually, its hue will also change to the bright hue. If the light is enhanced to a certain extent, any color can become white. The reflective point of black porcelain is also white, because the light at the reflective point is concentrated and strongly reflected. In the same way, the light gradually decreases, and various colors change to low lightness. When the light weakens to a certain extent, any color will become black, because the object does not reflect any light is black.

印刷車間的看樣臺必須符合要求，一般要求照度達(dá)到100lx左右，才能正確識別顏色。

The sample viewing platform in the printing workshop must meet the requirements. Generally, the illumination must reach about 100lx to correctly identify the color.

不同的色光

Different color light

色光下看樣與日光下看樣是有差異的，在生產(chǎn)實(shí)際中，多數(shù)是在電源的照射下工作，而每種光源均帶有一定顏色。這就給正確判斷原稿或產(chǎn)品顏色帶來一定困難，色光下觀色，色彩變化一般是相同色變淺，補(bǔ)色變暗，在印刷車間，一般都選擇色溫較高（3500~4100k），顯色系數(shù)較好的日光燈作為看樣光源，但要注意日光燈略偏藍(lán)紫色。

There are differences between looking at samples under colored light and looking at samples under sunlight. In production practice, most of them work under the illumination of power supply, and each light source has a certain color. This makes it difficult to correctly judge the color of the original or the product. When viewing the color under the color light, the color change is generally the same color becoming lighter and the complementary color becoming darker. In the printing workshop, the fluorescent lamp with high color temperature (3500~4100k) and good color rendering coefficient is generally selected as the sample light source, but it should be noted that the fluorescent lamp is slightly blue-purple.

先后顏色對比

Sequential color contrast

先看樣張?jiān)倏从∑泛拖瓤从∑吩倏礃訌垼浣Y(jié)果會略有不同，分兩次看一種色時感覺不一樣。這種現(xiàn)象叫做先后顏色對比反應(yīng)。先看的顏色使該色的色神經(jīng)纖維興奮，馬上再看別的顏色，其它色神經(jīng)很快興奮引起色感，而先看色的色神經(jīng)處于興奮后的抑制狀態(tài)，再興奮較慢，引起了負(fù)色相反應(yīng)。

The results will be slightly different when you look at the sample first and then the print and then the sample. When you look at the same color twice, you will feel different. This phenomenon is called sequential color contrast reaction. The color you see first excites the color nerve fibers of that color, and then look at another color immediately. The other color nerves are excited quickly and cause color sensation, while the color nerve you see first is in the inhibition state after being excited, and then excited slowly, causing negative color reaction.

這種反應(yīng)加上新看色的色相，形成新的色，所以改變了后看顏色。而且改變的色相還是有規(guī)律，是向先看顏色的補(bǔ)色方面改變。

This reaction, coupled with the hue of the new color, forms a new color, so it changes the color after looking. Moreover, the change of hue is still regular. It is to change the complementary color of the color first.

了解上述三個方面的問題并掌握它們的變化規(guī)律，我們在實(shí)際看樣時就應(yīng)加以注意，這樣才能保證印刷產(chǎn)品質(zhì)量的穩(wěn)定和提高。還有什么相關(guān)問題嗎？歡迎來我們網(wǎng)站http://www.helloyong.com做咨詢！

We should pay attention to the above three problems and grasp their changing rules when we actually look at the samples, so as to ensure the stability and improvement of the quality of printed products. Are there any other relevant questions? Welcome to our website http://www.helloyong.com Consulting!