膠印膜具有購買方便、經(jīng)濟(jì)、供貨及時(shí)、工藝條件相對(duì)成熟等一系列優(yōu)點(diǎn)。然而，膠版膠片有一個(gè)致命的弱點(diǎn):表面過于光滑。在感光樹脂柔性板的光聚合過程中會(huì)釋放出一定量的氧。只有磨砂膜才能使這些氧氣順利排出，使膜與平板保持不斷接觸，準(zhǔn)確地傳遞圖像。與此相反，膠印膜表面光滑，不能順利輸出氧氣，導(dǎo)致膜與印版之間的空間增大，導(dǎo)致圖像變形、文字增厚、模糊等缺陷。一些制版人員使用粉末粉末噴灑的方法在一定程度上緩解了這些問題，但同時(shí)也導(dǎo)致透光率下降，增加了片的霧度。
Offset film has a series of advantages, such as convenient purchase, economic, timely supply and relatively mature process conditions. However, offset film has a fatal weakness: the surface is too smooth. A certain amount of oxygen will be released in the photopolymerization process of photosensitive resin flexible plate. Only the frosted film can make the oxygen discharged smoothly, keep the membrane in constant contact with the plate, and accurately transfer the image. On the contrary, the surface of offset film is smooth and can not output oxygen smoothly, which leads to the increase of space between film and plate, resulting in image deformation, text thickening, fuzzy and other defects. Some plate makers use powder spraying method to alleviate these problems to a certain extent, but at the same time, it also leads to the decrease of light transmittance and increases the haze of negative film.
分析錯(cuò)誤2:印前系統(tǒng)配置不合理
Analysis error 2: unreasonable configuration of prepress system
因?yàn)槿嵝园嬗∷⒌奶厥廛浖容^昂貴,可以接受非普通中小制版公司,只有少數(shù)海外公司在目前可以使用,而絕大多數(shù)的制版制造商根據(jù)當(dāng)?shù)厍闆r進(jìn)行定位。
Because the special software of flexographic printing is relatively expensive, it can accept non ordinary small and medium-sized plate making companies. Only a few overseas companies can use it in China at present, while the vast majority of plate making manufacturers locate themselves according to local conditions.
一般來說，大多數(shù)小型制版廠使用平臺(tái)掃描儀和數(shù)碼相機(jī)作為輸入設(shè)備，修改電腦使用的PC或apple G3，加上照排機(jī)和電影處理器作為輸出設(shè)備。由于印版尺寸的限制，國內(nèi)許多廠家復(fù)制膠版制版配置，甚采用印刷輸出、攝影等滯后技術(shù)，使得國內(nèi)瓦楞紙箱柔印技術(shù)一直處于水平狀態(tài)。僅作為手工刻膠板的替代品，它還沒有進(jìn)入彩色瓦楞紙箱印刷時(shí)代。與國外同行相比，我們?cè)谖磥砺浜罅私?0-15年。
In general, most small plate making plants use platform scanners and digital cameras as input devices, modify the PC or apple G3 used by computers, and add imagesetters and movie processors as output devices. Due to the limitation of printing plate size, many domestic manufacturers copy offset plate making configuration, and even adopt lag technology such as printing output and photography, which makes the domestic corrugated box flexo printing technology at a low level. It has not entered the era of color corrugated box printing only as a substitute for manual engraving. Compared with foreign counterparts, we are nearly 10-15 years behind in the future.
濟(jì)分析錯(cuò)誤3:板材選材盲目
Economic analysis error 3: blind selection of plate materials
許多制版企業(yè)不考慮印刷廠的實(shí)際情況，如印刷機(jī)的型號(hào)、膠帶的厚度、所用油墨的種類等，盲目跟風(fēng)。以瓦楞紙箱用板為例。很多客戶只知道杜邦公司的TDR板塊。TDR是一種應(yīng)用廣泛的瓦楞紙板材料，制版性能優(yōu)異，但其分辨率不如EXL / UXL等一批薄板。當(dāng)打印e型起皺和圖像達(dá)到120行/英寸時(shí)，需要使用EXL / UXL和其他帶有海綿墊的薄板，以獲得高分辨率。同時(shí)，隨著印版硬度的提高，還可以減少網(wǎng)點(diǎn)的膨脹，使印品達(dá)到優(yōu)異的效果。
Many plate making enterprises do not consider the actual situation of the printing plant, such as the type of printing machine, the thickness of tape, the type of ink used, etc., blindly follow the trend. Take corrugated box board as an example. Many customers only know DuPont's famous TDR segment. TDR is a widely used corrugated board material with excellent plate making performance, but its resolution is not as good as that of EXL / UXL. When printing e-wrinkles and images up to 120 lines / inch, EXL / UXL and other sheets with sponge pads are required for high resolution. At the same time, with the improvement of plate hardness, it can also reduce the dot expansion, so that the printing products achieve excellent results.
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