To remove the positive charge from the printing roll, allowing the ink to stick there and from there transfer onto the paper.
Specially designed, pulsed CO2 lasers
The lasers use heat to target melanin (pigmentation) in the hair follicle. The heat travels down the hair shaft and destroys the root, preventing any growth of future hairs. The treatment consists of...
The old laser printers used He-Ne laser , and the modern laser printers use infrared laser .
Generally, a red (or perhaps infrared) laser is used. The laser "etches" the image onto a photosensitive cylinder inside the printer.
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