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Chester Carlson, a physics, American fiction in New York in 1938, 1947 and issued calls this method that uses inflection Siro xerography came from Greek words that translate the writing dry. The working principle of a rotating cylinder to attach wax paper and use a text or image shine of document duplication to the cylinder rotated by the ceiling glass and lenses. This allows the lighting system can minimize or expand the size of the copy of the document. This cylinder is coated with a thin layer by electrostatic and chemical seleniam, which is the electrical. When the section is white, or of the original was the light will reflect light to make a charge on the barrel, the barrel was removed, but not the original black reflective. Electric charge will still live with the black powder charge, called color toner containing substances is based on the original paper copy of the plywood. In the original color copier to scan 3 times and it will be sent to bore through the light color, which is split into 3 progressively as light colors red blue and green colors are: 3 and create a new color using red, blue, purple and green are secondary, and yellow as well as black, appear as the original color copy. It's like a color copier to print the image is printed in color image is overlapping 4-storey private first class following the purple, yellow, red, green, and blue, the bottom is black.

Chester Carlson, an American physicist. Invented in New York in 1938, 1947 and released a way that zeros graphene xerography from the Greek. The author of
the work is a rotating cylinder for a paper attached by the projection optical system and the use of the copy text or images to the rotating cylinder through mirrors and lenses. This optical system makes it possible to reduce or enlarge the size of copies
cylinder is compressed by electrostatic coating a thin layer with selenium, which conduct electricity. When the white or the availability of the original light. It reflects light to the cylinders. Make a charge on the cylinder is removed. But Black's original non-reflective. The charge remains The electrically charged powder to extract compounds called black color toner, which consists of an original image onto paper copier
, color copier. The original will be scanned three times and sent to the cylinders through the filters three colors, which is separated into primary colors of light 3 colors: red, blue and green, and then rebuilt by the use of color, the secondary is magenta, cyan and yellow. including black Turns out, according to a manuscript copy of
a color copier is like printing a color image is. The image is printed overlapping the first four floors are yellow. Later, magenta Followed by blue, green and finally black.

Chester Carlson, American physicists invented in New York last year. 1938 released, 1990. 1947 and call this method. Xerography xerography comes from the Greek word means writing dry
.The working principle is a rotating cylinder for paper attached around the projection light หรือภาพของ text document copy to the cylinder rotate through the mirror and the lens. This optical system can shrink or expand the size of the copy document
.This cylinder is compressed by the electrostatic coating and thin layers using selenium, which conduct electricity. When the white or the space of original was light will reflect to the cylinder. The charge on the cylinder is removed.Charge it remains. The charge will pull the black powder called substances change color toner a form based on the original down paper photocopy
.In a photocopying colored original is scanned 3 times and sent to the cylinder through the optical filter 3 color. The separate colors of light 3 colors including red, blue and green, and create a new use of secondary color is purple, red.And yellow and black to appear as the color original copy
.Copying color is like color halftone image is the image will be printed over 4 layers: the yellow, magenta, blue and green and finally is black.