" POSITIVE ROLE IN BOND "THE CLASSES OF TEACHER -Prof, I have to always make a positive for my screen printing work? -Si, is one of the basics to fix your image on a screen or frame, the quality of your good will depend on the quality of printing. "And it was always like this? "Obviously not, in its infancy, blocking the mesh screen printers drawing the image directly into the frame, blocking the areas for where the ink was not to happen, first with egg white, then with shellac or some liquid that was not affected by the ink. And have always used plastic film positive? "No human ingenuity always looking for alternatives, either for economy, or not be available to specialized somewhere (the famous fotolitos or PHOTOMECHANIC ) where they develop positive. There
techniques that were used or are using, because that is passed from mouth to mouth, and there are screen printers and designers with the practice have acquired a great ability to do positive. One technique is to draw with ink or rapidographs on a film with a matte side known as herculene, rapidographs to trace the lines with a brush and fill the black areas If you have no acetate mate, you can clear acetate sanding, and sanding it to make your positive is also very popular for both cut film set in the frame, to make hand-cut positive. "And the slides obtained are useful in laser printer? "If it is a very good alternative, since the laser printer toner is a plastic base, that is its opacity is very good. "If I have access to these slides, or I is expensive, or just want to do small runs, is there any alternative? "Of course, you can print paper albanene or plant in your laser printer, although I would not recommend it, because the toner is not fixed very well to the surface of this material " Then I can do ? "Well, you can try a method that we use in ITESDI to make positive in a fast, quality and economic "I'm going to try -Ok, give a click on the image, so that a sequence graph you how., And dale click a word in red to For an explanation of their meaning. professional "Thanks, I'll do 
ijav As stated in his commentary, which I appreciate as everyone like to leave, you can use cooking oil, but over time the oil is "arrancia" and leave an unpleasant odor and also darkens and "powders" very easily, and lacquer, having affirmed the "toner", encapsulates the oil
"Good morning Professor -Have fun, that I can help you today _Fijese that emulsify a framework , small circles were formed that prevented the emulsion was even -Ok, this is due to your frame was not properly degreased "And as I can degrease professional? "After having removed recycling and " ghosts "or shadows the previous posters, take a pass with 2 tow soaked in laquer thinner or thinner standard (as may be known in your area). If despite this (because many times thinner than sell you something greasy) will still leave these circles, before emulsifying, wet a sponge with vinegar, transfer it over the net and rinse, dry them and remove it any grease residue -Prof, I recycle my frames and ink drops, but I can not remove the "ghost", but I use the recommended fluid, it is always the shadow "If you let your frame too long (over one month) without recycling, that causes the image to the frame. A sure way to erase the "ghosts" on your screen is wet two tow in solvent ink vinyl (they sell it where you buy your plastisol inks or textiles) and rubbing, first gently, then rub both sides of the mesh, the smell is rather strong, but worth it because it leaves no trace of the "ghosts." left to air in a well ventilated area, and when the solvent evaporates, screen clean with laquer thinner, dry with a hair dryer and ready -
What is Screen Printing? Screen printing is the printing system serial oldest known, attributed to the Chinese, even before the silkworm
is not known exactly where, or time, and who invented this printing system, but has found that many paintings found in caves were made using vegetable colors on template placed on the walls.
printing is a printing system which consists of fixing an image on a surface with ink from a brush, roller or squeegee to travez a template, frame or frame with this image previously drawn, blocking those areas where it is desired stamp
The oldest record of this system have been found in China, Japan and Fiji, where people stamped their tissues using banana leaves, previously cut with drawings and, placed on the tissues used a paint plant that colored those areas which had been cut.
With the development of silk frames are covered with this material, are drawn characters and images directly blocking the areas that are not going to be printed and the printing was born there, word composed of the words graphos Sericum = silk = writing, writing travez silk, a name that has lasted almost throughout the world except United States, that if silk screen process, and due to the use of nylon mesh and polyester, has changed its name to screen printing, leaving that of serigraphy only the artistic area, so when you reference to our business in English, we will always use the term screen printers, to avoid confusion
