目前，數(shù)字印刷發(fā)展迅速，特別是噴墨印刷，主要使用水性油墨。數(shù)碼印刷中存在網(wǎng)點(diǎn)放大問(wèn)題。噴墨打印的網(wǎng)點(diǎn)擴(kuò)展主要有光學(xué)網(wǎng)點(diǎn)擴(kuò)展和物理網(wǎng)點(diǎn)擴(kuò)展。光學(xué)網(wǎng)點(diǎn)膨脹主要是由于光線在紙張內(nèi)部的物理反應(yīng)引起的，而物理網(wǎng)點(diǎn)膨脹主要是由于油墨在紙張上的擴(kuò)散和滲透引起的。印刷廠會(huì)對(duì)紙張的哪些方面考量？下面濟(jì)南書刊雜志印刷廠家為您分析：

At present, digital printing is developing rapidly, especially inkjet printing, which mainly uses water-based ink. There is a problem of dot amplification in digital printing. The dot expansion of inkjet printing mainly includes optical dot expansion and physical dot expansion. Optical dot expansion is mainly caused by the physical reaction of light inside the paper, while physical dot expansion is mainly caused by the diffusion and penetration of ink on the paper. What aspects of paper will the printing factory prioritize? Below is an analysis by Jinan book and magazine printing manufacturers for you:

1.白度和色差

1. Whiteness and color difference

由于大小和造紙工藝的差異，紙張形成色差。白度是紙張的一項(xiàng)重要光學(xué)性質(zhì)。當(dāng)光線照射到紙張上時(shí)，會(huì)發(fā)生反射、折射、散射和吸收。通過(guò)測(cè)量這些光在特定條件下的通過(guò)量，可以得到紙張的光學(xué)性質(zhì)。

Due to differences in size and papermaking process, paper forms color differences. Whiteness is an important optical property of paper. When light shines on paper, reflection, refraction, scattering, and absorption occur. By measuring the amount of light passing through under specific conditions, the optical properties of the paper can be obtained.

紙的白度主要是通過(guò)以定長(zhǎng)光波為中心在樣品上的反射率來(lái)測(cè)定的。這種方法沒有考慮人眼的視覺特性。因此，在印刷中使用對(duì)應(yīng)的值來(lái)表示紙張的顏色，不僅可以直接反映紙張的白度和色差，而且與人眼對(duì)顏色的視覺一致。

The whiteness of paper is mainly measured by the reflectivity of the sample centered on a fixed length light wave. This method does not take into account the visual characteristics of the human eye. Therefore, using corresponding values to represent the color of paper in printing can not only directly reflect the whiteness and color difference of the paper, but also be consistent with the human eye's visual perception of color.

2.光譜反射率

2. Spectral reflectance

當(dāng)紙張的底色不是純白色時(shí)，紙張上印刷色塊的顏色可以說(shuō)是油墨的顏色與紙張的顏色混合后的綜合顏色。這樣，紙張的底色就會(huì)出現(xiàn)色差。

When the background color of the paper is not pure white, the color of the printed color blocks on the paper can be said to be the combined color of the ink color and the paper color. In this way, the background color of the paper will show color difference.

在這種情況下，印刷廠的工作人員一定要對(duì)原稿的內(nèi)容和顏色進(jìn)行分析，并采取一些措施來(lái)糾正顏色，紙張的干擾。

In this case, the staff of the printing factory must analyze the content and color of the original manuscript and take some measures to correct the color and eliminate paper interference.

為了滿足光譜顏色管理的研究趨勢(shì)，印刷工廠需要紙的顏色特征參數(shù)，利用反射率在可見光波長(zhǎng)范圍內(nèi)代表紙張和印刷的顏色，和研究之間的關(guān)系的反射率光譜反射率的紙張和印刷。

In order to meet the research trend of spectral color management, printing factories need color characteristic parameters of paper, which use reflectivity to represent the color of paper and printing within the visible light wavelength range, and study the relationship between reflectivity and spectral reflectance of paper and printing.

結(jié)果表明:紙張的光譜反射率與單色印刷的光譜反射率線性相關(guān)，而與多色印刷的光譜反射率線性無(wú)關(guān)。

The results indicate that the spectral reflectance of paper is linearly correlated with the spectral reflectance of monochrome printing, but not linearly correlated with the spectral reflectance of multicolor printing.

通過(guò)分析黃色、品紅、青色油墨的光譜反射曲線，印刷廠可以找到不同的反射率高反射點(diǎn)和低反射點(diǎn)的每一種顏色的墨水的總和除以高反射點(diǎn)和低的反射率反射點(diǎn)相應(yīng)的墨水非常接近的點(diǎn)面積率墨水。因此，可以用歸一化方法預(yù)測(cè)青色、品紅和黃色的網(wǎng)點(diǎn)面積值。更多相關(guān)事項(xiàng)就來(lái)我們網(wǎng)站http://www.aozhouhui.com咨詢！

By analyzing the spectral reflection curves of yellow, magenta, and cyan inks, printing factories can find the sum of inks of each color with different reflectivity high and low reflection points divided by the point area ratio ink that is very close to the corresponding ink with high and low reflectivity reflection points. Therefore, normalization methods can be used to predict the dot area values of cyan, magenta, and yellow. For more related matters, come to our website http://www.aozhouhui.com consulting service