1 printing pressure

柔印壓力一般為1-3公斤/平方厘米，而瓦楞紙箱的印刷壓力一般為1-2公斤/平方厘米。由于印版的壓力和壓印滾筒的反作用力，在印刷操作中經(jīng)常出現(xiàn)淺色和色偏現(xiàn)象。當(dāng)油墨量被認(rèn)為是“不足”時(shí)，印版滾筒的印刷壓力通常會(huì)增加以滿足油墨顏色要求，從而導(dǎo)致嚴(yán)重的邊緣效應(yīng)，例如網(wǎng)點(diǎn)擴(kuò)大和模糊字符，這將有限的油墨量擠壓到不必要的地方。在瓦楞紙上印刷時(shí)，由于壓力大，在瓦楞的較高部分出現(xiàn)搓板狀的凹槽，由于有彈性襯墊的補(bǔ)充，可以稍微避免。在分級(jí)印刷中，網(wǎng)點(diǎn)增益值嚴(yán)重，會(huì)導(dǎo)致整頁(yè)網(wǎng)點(diǎn)的高調(diào)發(fā)展，暗調(diào)部分成為嚴(yán)重的場(chǎng)色偏，導(dǎo)致整個(gè)畫面層次不清，立體感不強(qiáng)，場(chǎng)、行、字出現(xiàn)邊緣效應(yīng)，不飽滿、不厚實(shí)，字體被粘貼。因此，采用合適的壓印力尤為重要。目前，瓦楞紙箱印刷質(zhì)量差是由于印刷壓力不當(dāng)。在實(shí)際操作中，除了用彈性墊來(lái)緩沖壓力外，還要注意印刷機(jī)壓力的調(diào)節(jié)和平衡。一般來(lái)說(shuō)，壓力應(yīng)該調(diào)整到網(wǎng)點(diǎn)擴(kuò)大，邊緣效應(yīng)不明顯2.瓦楞紙質(zhì)量

Flexo printing pressure is generally 1-3 kg / cm2, while corrugated box printing pressure is generally 1-2 kg / cm2. Due to the pressure of the plate and the reaction force of the imprint cylinder, light color and color deviation often appear in printing operation. When the amount of ink is considered "insufficient", the printing pressure of the plate cylinder is usually increased to meet the ink color requirements, resulting in serious edge effects, such as dot enlargement and blurred characters, which squeeze a limited amount of ink into unnecessary places. When printing on corrugated paper, due to the high pressure, washboard like grooves appear in the higher part of the corrugated, which can be slightly avoided due to the supplement of elastic cushion. In the grading printing, the dot gain value is serious, which will lead to the high-profile development of the whole page dot. The dark tone part becomes a serious field color deviation, resulting in the whole picture level is not clear, the three-dimensional sense is not strong, the field, line, word edge effect, not full, not thick, the font is pasted. Therefore, it is particularly important to use the appropriate impression force. At present, the poor printing quality of corrugated boxes is due to improper printing pressure. In practice, in addition to using elastic cushion to cushion the pressure, but also pay attention to the adjustment and balance of press pressure. Generally speaking, the pressure should be adjusted to dot enlargement, the edge effect is not obvious. 2

我們應(yīng)該保證瓦楞紙的重量穩(wěn)定，厚度均勻，水分合理均勻，油墨吸收好，干燥快。高質(zhì)量的紙板是高印刷質(zhì)量的前提。后，記錄并保持相同的印畫筆參數(shù)(印畫筆速度、壓力、墨水粘度和環(huán)境溫度等)也同樣重要。)以確保印畫筆的顏色在紙箱產(chǎn)品批次之間保持一致。

We should ensure that the weight of corrugated paper is stable, the thickness is uniform, the moisture content is reasonable and uniform, the ink absorption is good, and the drying is fast. High quality paperboard is the premise of high printing quality. Finally, it is equally important to record and maintain the same brush parameters (brush speed, pressure, ink viscosity, ambient temperature, etc.). ）To ensure that the color of the printing brush is consistent between carton product batches.

3.保持版本位置準(zhǔn)確

3. Keep the version position accurate

，在制版過(guò)程中，要確保圖案和字符在版材位置上的相對(duì)大小和位置是準(zhǔn)確的，并且當(dāng)印版材重疊時(shí)，印是準(zhǔn)確的。安裝印板時(shí)，應(yīng)以線為準(zhǔn)，襯墊和印板應(yīng)安裝平穩(wěn)。如有必要，使用定位系統(tǒng)。對(duì)于大多數(shù)紙箱生產(chǎn)廠家來(lái)說(shuō)，為了節(jié)約生產(chǎn)成本，在制作印版時(shí)都采用橡膠版和樹(shù)脂版，這就對(duì)制版和裱糊提出了更高的要求，因此有必要保證印版的準(zhǔn)確定位。印版的制作、組裝和校正應(yīng)認(rèn)真細(xì)致，并確保各版位置準(zhǔn)確。

First of all, in the process of plate making, make sure that the relative size and position of patterns and characters on the plate position are accurate, and when the plate overlaps, the printing is accurate. When installing the printing plate, the center line shall prevail, and the gasket and printing plate shall be installed stably. If necessary, use a positioning system. For most carton manufacturers, in order to save production costs, rubber plate and resin plate are used in plate making, which puts forward higher requirements for plate making and pasting, so it is necessary to ensure the accurate positioning of plate. The production, assembly and correction of the plate should be careful, and ensure that the position of each plate is accurate.

4.水性油墨的質(zhì)量

4. The quality of water-based ink

印毛筆的顏色是由墨水的顏色形成的，所以水性墨水的質(zhì)量關(guān)系到印毛筆的顏色是否純正，這是色澤鮮艷的關(guān)鍵，直接影響到印毛筆顏色的一致性，所以在選擇時(shí)要特別注意。無(wú)論是直接購(gòu)買成品油墨還是自己配制油墨，都要嚴(yán)格控制水墨畫的技術(shù)指標(biāo)。油墨與顏色標(biāo)準(zhǔn)無(wú)明顯差異，細(xì)膩、粘稠，濃度適宜；用水或酒精溶劑稀釋時(shí)，沒(méi)有沉淀或結(jié)塊；用沒(méi)有泡沫的木棍攪拌；與其他油墨混合，配色親和力好，沒(méi)有不相容性。制備的油墨顏色純正，無(wú)異常反應(yīng)。

The color of printing brush is formed by the color of ink, so the quality of water-based ink is related to whether the color of printing brush is pure or not, which is the key to bright color, which directly affects the consistency of printing brush color, so special attention should be paid to it when selecting. Whether it is direct purchase of finished ink or self-made ink, we should strictly control the technical indicators of ink painting. There is no obvious difference between high quality ink and color standard. It is fine, sticky and suitable for concentration. When diluted with water or alcohol solvent, it does not precipitate or agglomerate. It is stirred with wooden sticks without foam. Mixed with other ink, it has good compatibility and no incompatibility. The color of the prepared ink is pure without abnormal reaction.