Halftone printing - Amitoppan

…Relief printing, as can be easily understood by looking at examples of printing plates, is a method of printing in which the image surface is higher than the non-image surface, and ink is applied only to the image surface by utilizing the difference in height between the two. There are many types of relief printing. The most typical is the letterpress used in letterpress printing, but other types include line relief printing, which makes only the line drawing part raised to print line drawings, photographic plates (halftone relief printing), which replace light and dark shades with large and small raised dots (called halftone dots) to print photographs and other objects with gradations of light and dark, highlight plates, a type of photographic plate in which the halftone dots in the white parts of the original are removed to emphasize the white parts of the original, and primary color plates, a type of photographic plate, used in color printing. Unlike planographic printing, in which printing ink is applied selectively to the plate surface, and intaglio printing, in which unnecessary ink is removed from the plate surface before printing, it is easy to apply ink to the plate surface with relief printing, which allows for stable printing without image distortion that can occur during printing, and is also suitable for printing large numbers of copies. …

*Some of the terminology that refers to "screen printing" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…凸版は，印判の例を見てもたやすく理解できるように，画線の面が非画線の面より高く，この間の高低差を利用して画線面のみにインキをつけて印刷するもので，これには非常に多くの種類がある。最も代表的なものは活版印刷で用いられる活版で，このほか，線画を印刷するために線画部分のみを凸にした線画凸版，写真など濃淡の階調のあるものを印刷するため，濃淡を凸状の点(網点という)の大小におきかえた写真版(網凸版)，写真版の一種で，原画の白色部を強調するため白色部の網点を取り除いたハイライト版，同じく写真版の一種で，カラー印刷に用いる原色版などがこれに属する。　印刷インキを版面に選択付着させる平版や，不要のインキを版面から除去してから印刷する凹版などと異なり，凸版では，版面へのインキの付着は簡単で，このため印刷中に起こりうる画像のゆがみがなく安定した印刷が可能であり，また大部数を印刷する場合にも適している。…

※「網凸版」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報