揉捏奶头高潮呻吟视频试看-揉着我的奶从后面进去视频-肉大榛一进一出免费视频-肉色超薄丝袜脚交一区二区视频-肉色丝袜脚交一区二区-肉色丝袜脚专区一区二区

Search

Current Location:Home > News > Industry news

News
Gravure Printing of Gravure Printing Press

Category:Industry news   Addtime:2019-03-23 10:38:00   Clicks:2043 次

Gravure printing is short for gravure printing, which is one of the four printing methods. Gravure printing is a direct printing method, which directly imprints the ink contained in the gravure pit onto the impression. The depth of the impression is determined by the pit size and depth. If the pit is deep, it contains more ink, and the ink layer left on the impression is thicker. On the contrary, if the pit is shallow, the ink content is less, and the impression after impression is less. The ink layer left on it is thinner. Gravure printing plate is composed of pits corresponding to the original text and the surface of the plate. When printing, the ink is filled into the pit. The ink on the surface of the plate is scraped off with a scraper. There is a certain pressure contact between the plate and the substrate. The ink in the pit is transferred to the substrate to complete printing.

Gravure printing, as a kind of printing technology, occupies an extremely important position in the field of printing packaging and graphic publishing due to its advantages of thick ink layer, bright color, high saturation, high printing resistance, stable printing quality and fast printing speed. From the point of view of application, gravure printing is mainly used for fine publications such as magazines, product catalogues, packaging printing, banknotes, stamps and other securities printing, but also for decorative materials and other special fields; in China, gravure printing is mainly used for soft packaging printing. With the development of gravure printing technology in China, gravure printing has also been used in paper packaging, wood decoration, leather materials, pharmaceuticals. Product packaging has been widely used. Of course, gravure printing also has its limitations, the main shortcomings are: the technology of pre-press plate making is complex, the cycle is long, and the cost of plate making is high; because of the use of volatile solvents, the content of harmful gases in the workshop is high and the health of workers is greatly damaged; gravure printing practitioners require relatively high treatment.
主站蜘蛛池模板: 撕开奶罩揉吮奶头高潮av | 狠狠躁夜夜躁无码中文字幕 | 亚洲日本一区二区三区在线不卡 | 久草精品在线 | 久久三级视频 | 99久久免费视频在线观看 | 日本不卡一区二区三区在线 | 欧美亚洲福利 | 久久综合精品无码av一区二区三区 | 久久综合狠狠综合久久综合88 | 国产亚洲精品aaaa片app | 国产亚洲欧美精品永久 | 欧美牲交a欧美牲交aⅴ | 日本三级精品 | 久久午夜夜伦鲁鲁片无码免费 | 亚洲成人福利在线 | 久久婷婷五月综合色一区二区 | 女人被强╳到高潮喷水在线观看 | 久爱视频www在线播放 | 久久国产免费观看精品3 | 久久久噜噜噜www成人网 | 午夜精品久久久久久久99热 | 无码av免费精品一区二区三区 | 欧美嘿咻视频 | 激情视频在线免费 | 老师在办公室被躁到白浆 | 午夜剧场免费观看 | 毛片在线观看视频 | 久久精品中文字幕无码绿巨人 | 爽爽影院在线看 | 日韩电影一区二区三区 | 久久这里有精品 | 日韩免费在线观看 | 精品无码人妻一区二区三区 | 大伊香蕉在线观看视频 wap | 欧美吹潮| 亚洲av无码一区二区乱子仑 | 无码成人一区二区 | 国产精品精华液网站 | 久艹精品 | 久久日本精品一区二区三区 |