7/27/2008

One of Silk-screen printing technology:Gauze printing technology


Along with silk screen print type's increase, silk screen material and the silk screen's type also grows day by day. Usually, the silk screen material is at first borrows from other industries comes, afterward needed to develop some other type material along with the silk-screen printing.
Although already had many and varied nonmetallic silk screen material to use in the silk-screen printing industry, like silk, nylon and polyester and so on, but they still could not meet all silk-screen printing needs. For instance, uses in dye printing or the porcelain ink printing silk screen material must be able to withstand the printing ink and the resolver long-term erosion, the silk screen needs to recycle again using and so on. In order to satisfy these silk-screen printing the need, the people are urgently needed have one kind of life to be long, stable good silk screen, therefore in the industry is called as “the gauze” the silk screen was born.
Because the gauze its tinsel's diameter is consistent, and may achieve is very thin, therefore, it may print the finest design. The gauze mesh (mesh) is also consistent, also compared to other silk screen material mesh big, moreover the gauze does not look like easy to attract the ink the nonmetallic silk screen, its tinsel nonabsorbing printing ink or resolver, can therefore obtain the even printing ink film. Its merit are many: Pattern plate's frequent replacement will not create the damage to the gauze; The printing ink also easy to pass through the gauze; The especially qualify in the use porcelain ink, the frit printing ink, the laminated copper powder printing ink and the dye printing ink carries on printing the situation; May use in the quite fine work; The gauze can obtain the thick printing ink film; The rigidity is good, in printing the chromatography is accurate; May use in the machinery automation, the semiautomation or manual printing. In the past, because the gauze is not easy to stretch and the price expensive reason, generally only uses in manufacturing the small screen, but the present more and more uses in medium and in the large-scale silk screen. Although its expensive elasticity is not good, but its uniformity and might the non-time limit use characteristic reduce the cost as a whole. Moreover correctly the stretch and the printing technology can make up the elastic bad shortcoming.
Uses in the silk-screen printing the gauze having two kind of knitting types, namely the plain weave and twists weaves. And the plain weave is more commonly used, twists weaves uses in the very fine work. Like Figure 14, 15 show, the plain weave is the simple root line latitude and longitude interlocks the superimposition, but twists weaves is the pipe joint line latitude and longitude superimposition. Two knitting methods weave the silk screen mesh is the square shape. Twists weaves the silk screen which the method obtains to be thick.
Is the same with other silk screens, the gauze is (silk mesh wire's number) classifies by an item of number. Only uses the square in the silk-screen printing mesh, but does not use the rectangle mesh. The square mesh has the similarly many mesh numbers in the length direction and the width direction and the similarly great mesh size. Each inch or the centimeter mesh number's computation is by any mesh wire beginning to 1 inch far distance all mesh integers. For example: the 80th silk screen must be in each square inch has 80X80 mesh, namely has 6400 mesh; 300 gauzes must be in each square inch have 300*300 mesh, namely 90000 consistent mesh. The gauze general sign has “Number 80” either “80*80”, “Number 165” or “165*165” and so on inscriptions. Usually the gauze type has 80/inches (31/centimeters) to 635/inches (250/centimeters). However, the rougher gauze may also buy in the market. Silk screen's line number is lower, mesh is bigger; Otherwise, the line number is higher, mesh is smaller. In the silk screen, mesh wire's diameter take inch or the millimeter as a unit.
Silk screen's choice needs to read the duplication work the situation, the printing ink type and the printing surface condition. You may purchase from silk-screen printing business there to 1 surface foot (0.09 square meter) above any size silk netting, its width may from 36 inches (91 centimeters) to about 79 inches (200.7 centimeters), the length not limit.
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