Category:heavy

Question:
screen printing and offset of the main differences and similarities

Answer:
hole printing screen printing part of it with the flat printing, letterpress, gravure printing method, together known as the Big Four.
Screen printing is silk fabrics, synthetic fabric or metal mesh stretched the net frame, using hand-engraved plate film or a photochemical process to make screen printing plate. Modern screen printing technology, it is the use of light-sensitive materials through the photolithography process to make screen printing plate (to screen printing plate on the graphic part of the mesh holes for the through-hole, rather than the graphic part of the mesh holes blocked to live). Squeeze through the printing scraper, so that part of the ink through the mesh Graphics transferred to the substrates, forming the same with the original graphic. Screen printing equipment is simple, convenient operation, printing, plate-making simple and low cost, adaptability. Screen printing a wide range of common printing applications include: color paintings, posters, business cards, binding covers, product label, as well as printing and dyeing textiles.

offset lithography is a very simple means of speaking that is offset rubber (blanket) will be printed edition of the plan asked to pass on to the printing on substrates, it is also blanket the existence of such a printing method name. Blanket in the printing has played an irreplaceable role, such as: it can make up for a good printing surface not smooth, so that an adequate transfer of ink, which can reduce the printing plate on the water (the role of water in the printing see below ) to the substrates passing, and so on. Above is also just a general concept, we now often say offset the extent possible, be more narrow in scope, that is, three-cylinder (printing plates, blankets, embossed) in offset printing, in China, said the South to such a printing for offset printing.

Chinese:丝网印刷与胶印的主要区别和相同点

类别: 重工业

问题:
丝网印刷与胶印的主要区别和相同点

回答:
丝网印刷属于孔版印刷，它与平印、凸印、凹印一起被称为四大印刷方法。
丝网印刷是将丝织物、合成纤维织物或金属丝网绷在网框上，采用手工刻漆膜或光化学制版的方法制作丝网印版。现代丝网印刷技术，则是利用感光材料通过照相制版的方法制作丝网印版(使丝网印版上图文部分的丝网孔为通孔，而非图文部分的丝网孔被堵住)。印刷时通过刮板的挤压，使油墨通过图文部分的网孔转移到承印物上，形成与原稿一样的图文。丝网印刷设备简单、操作方便，印刷、制版简易且成本低廉，适应性强。丝网印刷应用范围广常见的印刷品有：彩色油画、招贴画、名片、装帧封面、商品标牌以及印染纺织品等。

胶印是平版印刷的一种，很简单的讲胶印就是借助于胶 皮（橡皮布）将印版上的图问传递到承印物上的印刷方式，也正是橡皮布的存在，这种印刷方式得名。橡皮布在印刷中起到了不可替代的作用 ，如：它可以很好的弥补承印物表面的不平整，使油墨充分转移，它可以减小印版上的水（水在印刷中的作用见后）向承印物上的传递等等。 以上也仅仅是一个笼统的概念，我们现在通常说的胶印可能范围更狭窄些，即有三个滚筒（印版、橡皮布、压印）的平版印刷方式，在我国的 南方把这种印刷方式称为柯式印刷。