The principle of laser tattoo removal

    a) the basic view is that the laser is absorbed by the tattoo pigment, because these pigments are a variety of colors, so the need for multi-wavelength laser to remove tattoos. By the laser can remove most of the "visible" colors, and / or change the color of the remaining pigments, these pigments with the beginning of the laser (200mw green laser) used is invalid. This led to the tattoo is difficult to handle.

    b) the longer wavelengths penetrate the skin deeper and less divergent. In addition to wavelength, the laser spot size also determines the penetration depth. Divergence of light edges, so a small spot of the high rate of divergence can not reach the skin deep. Therefore, in the treatment of tattoos when applied to a larger spot instead of increasing energy. Major role because of the increased energy in the shallow, leading to greater damage and scarring.

    c) When a given laser tattoo treatment is no longer valid, you need to consider other laser.

    d) any kind of laser can be used to treat a black tattoo (tattoo needle) , because black absorbs all wavelengths of light. Should be based on laser tattoo colors, tattoo color because the same issue with the wavelength of light the same color can be used to remove tattoos.

    e) The exact mechanism for tattoo removal are still unclear, but the laser can damage and thermal, photochemical or optical sound lead to instantaneous changes in the role of the optical properties of the tattoo particles.

    Biopsy histology and electron microscopy analysis showed that pigment disintegration into small pieces and then swallowed by macrophages or out of the body through the lymphatic system. Pigment granules are also changes in the structure. Dose of the laser treatment can be a temporary white. White pigment is due to rapid local heating of gas, or plasma formation and subsequent regeneration of the dermis and epidermis formation. White reaction immediately after the laser treatment 2-5 days after the skin has been replaced by scab. The experimental laser treatment for laser tattoo skin type response and the response of the laser provides the best choice. Smaller experimental treatment site within a month you can re-evaluation. Must guide patients in the treatment area after the lubricants containing petroleum jelly until the scab off.
http://naasbook.com/read_blog/89/get-rid-of-tattoos-before-laser-notes

http://kuninavi.net/read_blog/258/first-tattoo-on-the-tattoo's-understanding-and-attitude-errors

http://peepscreen.com/read_blog/2/laser-welding-machine-for-daily-use-and-maintenance