ขั้นตอนวิธีการสร้างมุมสกรีนสำหรับการพิมพ์เฟล็กโซกราฟี

• المؤلف الرئيسي: วรางคณา เอื้องอุดม
• مؤلفون آخرون: พรทวี พึ่งรัศมี
• التنسيق: Theses and Dissertations
• اللغة: Thai
• منشور في: จุฬาลงกรณ์มหาวิทยาลัย 2002
• الموضوعات: การพิมพ์เฟล็กโซกราฟี; การพิมพ์สี
• الوصول للمادة أونلاين: https://digiverse.chula.ac.th/Info/item/dc:35772
• المؤسسة: Chulalongkorn University

This research assigned algorithm to generate screen angles for a round dot screen using Rational-Irrational tangent technique. Screen angles had been generated according to the specified angles while the original image detail still maintained. These tests were printed on an in-line press flexographic machine with solvent-based process inks on a Linear Low Density Polyethylene. The moire pattern was observed by naked eye. For printing quality, the tone reproduction curves were evaluated and the grey balance was indicated in the CIE a*,b* diagram. The results show that the algorithm can generate any specified screen angles. In this experiment it was found that the moire pattern appeared between 37 to 52 degrees in the halftone single color printing. In process color printing at screen angles 0, 75, 15 and 45 degrees and at -7.5 from these degrees, printed yellow, magenta, cyan and black respectively, the moire pattern did not occur in both conditions. The tone reproduction of the 2 sets were the same good quality, grey balance closed to neutral grey and the result of dot gain compensate was reported.