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印刷厂对制版温度的控制特点

首先应选择与相版相配的丝网擦净,用高效洗净,用水反复冲 刷,凉干待用.假如有孔点或版上不应有的开孔部门可用封网胶作适当 的修补处理(烘干时间不宜过长,否则会造成网版再利用时脱膜难题) 。

We should choose and match the screen clean version, with high water wash, washed repeatedly, dry stand-by. If there is a hole or opening version should not be available for repair department block glue appropriate processing (drying time should not be too long, otherwise it will cause the screen when stripping problem).

用晒版机(单灯2000W)一般应在80秒至100秒为宜。它是利用感光浆 的化学变化,即感光浆受光部门产生交联硬化并与丝网牢固结合在一 起形成版膜,未感光部门经水或其它显影液冲刷显影后形成通孔而制 成丝网印版的。

With the printer (single light 2000W), generally should be in 80 seconds to 100 seconds is appropriate. It is the use of photographic chemical changes, namely the photographic Department produced by light crosslinking and screen hardening and firmly bonded together to form the version of the film, not by water or other sensitive departments developer developed after forming a hole made of silk screen printing plate.

时间过长,膜层湿膨胀严峻,影响图像的清楚度,并 易流失,版膜易烂;时间过短,显影不彻底会留有蒙翳(即余胶)造成废 版。不管什么样的网版都必需把未感光的部门完全洗净。余胶是一层 极薄的感光胶残留膜,易在图像细节处泛起高度透明,难于分辨,常 误以为显透,而印刷时油墨不能通过。

Time is too long, film wet expansion is severe, affecting the clarity of the image, and easy to drain, the film is easy to rot; time is too short, the development is not complete, will leave a mask (that is more than glue), resulting in waste version. No matter what kind of screen, it is necessary to completely clean the non photosensitive parts. The remaining glue is a very thin film of photosensitive adhesive residue, easy to appear in the details of the image of high transparency, difficult to distinguish, often mistaken for obvious, and printing ink can not pass.

网版的制版方法良多,也有其各自的优缺点,我们现在的制版 方法主要运用的是感光制版法的间接法。

Screen plate making method is very much, and also has its respective merits and demerits, our present plate making method mainly uses the photographic plate method indirect method.

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显影程度的控制原则是:在显透和显影的条件下,时间愈短愈 好。然后将调配好的感光浆平均地刷涂在丝网上,将网版放置于60-65 ℃的烘箱内,烘10-13分钟,再将感光浆平均地刷涂一遍,在烘箱内干 燥后,拿出待曝光,烘干时间过长或过高会造成显影难、脱网难,反 之版膜不牢、曝光不透。曝光时间长显影难题,时间短版膜不牢,显 影时易脱落易形成锯齿边。

The control principle of developing degree is that under the condition of showing and developing, the shorter the time, the better. Photographic screen on average brush and then prepared on the screen will be placed in the oven at 60-65 Deg. C, bake for 10-13 minutes, then the average photosensitive slurry brushing again in the oven dried out to be exposed, the drying time is too long or too high will cause developing off network difficult, difficult, and not the version of the film in prison, not through exposure. The exposure time is long, the developing problem is difficult, the time is short, the film is not stable, the developing is easy to fall off, and the sawtooth edge is easy to form.

为达到好的制版边沿效果,角度一般以与 网丝30度为佳,直绷网应与网框完全垂直,要必需避开网版上的孔洞 及气泡等污点。

In order to achieve good plate edge effect, generally with 30 degree angle mesh is better, straight net and net frame should be completely vertical, must avoid voids and bubbles on the screen the stain.

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