高静.基于印前网点补偿的印版校正方法研究[J].包装工程,2018,39(23):231-236.
GAO Jing.Plate Correction Method Based on Prepress Dot Compensation[J].Packaging Engineering,2018,39(23):231-236. |
| 基于印前网点补偿的印版校正方法研究 |
| Plate Correction Method Based on Prepress Dot Compensation |
| 投稿时间：2018-07-25 修订日期：2018-12-10 |
| DOI：10.19554/j.cnki.1001-3563.2018.23.037 |
| 中文关键词: 胶印 网点补偿 印版校正 校正模型 |
| 英文关键词: offset printing dot compensation plate correction correction model |
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| 中文摘要: |
| 目的 针对印刷品从咬口到拖梢前后墨色深浅不一致的问题，提出一种基于印前网点补偿的印版校正方法。方法 首先设计印刷品墨色均匀性检测的测试样张，建立墨色深浅与网点百分比的对应关系；在此基础上，建立从咬口到拖梢的网点再现均匀性校正模型；然后通过二分法求解校正模型自适应参数的最优取值，在胶印印前流程中对不同位置的阶调进行印版网点均匀性补偿；最后上机印刷，测量校正前后的密度值，分析前后墨色深浅不一致问题的解决情况。结果 先取得最优校正参数，对存在问题的测试版进行印版网点补偿后，测试版从咬口到拖梢网点百分比测量平均差值由14%降为2%，网点密度平均差值由0.18降为0.06，有效地控制了前后深浅不一致的问题。结论 该方法实现了从咬口到拖梢网点百分比基本一致，前后墨色深浅不一致的现象得到有效控制。 |
| 英文摘要: |
| The work aims to propose a plate correction method based on the prepress dot compensation with respect to the inconsistency of previous and subsequent ink color shade of the printed matter from the bite to the tip. Firstly, the test sample of the ink color uniformity detection of the printed matter was designed, and the corresponding relationship between the ink color depth and the percentage of the dot was established. On this basis, a dot reproduction uniformity correction model from the bite to the tip was established. Then, the optimal value of the adaptive parameters of the correction model was solved by the dichotomy method, and the uniformity of the printing plate dot was compensated for the tone at different positions in the pre-press offset printing process. Finally, it was printed on the machine and the density value before and after the correction was measured. The solution to the problem of the inconsistency of the previous and subsequent ink color depth was analyzed. Firstly, the optimal correction parameters were obtained. After the printing plate dot compensation was applied to the problematic test plate, the average measurement difference of the test plate from the bite to the tip was reduced from 14% to 2%, and the average dot density difference was reduced from 0.18 to 0.06. In such case, the problem of inconsistency of previous and subsequent ink color depth was effectively controlled. The proposed method realizes the basic consistency of the percentage from the bite to the tip dots, so that the phenomenon of inconsistent previous and subsequent ink color depth is effectively controlled. |
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