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How Laser Marking Machines Achieve Color Marking on Stainless Steel Surfaces

  With the widespread use of fiber lasers in laser devices, the laser marking market is also booming. However, in the daily marking products we see the basic marking patterns are black and white ash. From the existing laser marking process, only some of the fiber lasers can be color-coded on stainless steel.

  When the laser marks the stainless steel material, the color change of the surface layer of the material can be changed by adjusting the laser beam so as to obtain different color decoration effects. The advantage is the pulse width and frequency can be adjusted independently, adjusting one of the other laser parameters does not affect, which is not Q-switched laser structure. This feature adds unlimited color stainless steel marking. Pulse width, power, fill mode, delay parameters and other factors in the actual marking operations will affect the color effect.

  As the technology is not very mature and thus has its limitations, and the price so that most manufacturers can not accept. A color laser marking machine compared to the average price of laser marking machine several times more expensive. A New Laser Color Marking Technology Recently a group of laminated materials has been developed in Germany which comprises an outer laminate and an inner laminate, wherein the outer laminate comprises a transparent polymer support, A color laser markable layer on one side of the infrared dye that contains the absorption maximum in the infrared region, this laminate can be used for almost any common marking material, a technological advantage that distinguishes it from the average laser paper on the market.

  In Japan, a composition that can be used for laser color marking and a method of producing the same are also available. The composition of the composition includes: 100 parts by weight of the polymer; the content of the laser marking powder is 0.05622 parts by weight; and the content of the temperature-sensitive substance is 0.16210 parts by weight.

  The preparation method comprises the following steps: melt-blending the components including the polymer, the laser marking powder and the temperature-sensitive substance according to the component ratio. By adding temperature-sensitive substances and utilizing the heat generated in the laser marking process, the temperature-sensitive substances are thermally decomposed, oxidized and the like at a certain temperature, and the reactions destroy the original substance structure or generate a new substance, At the same time, a new color is produced. The color change is unidirectional, irreversible. After cooling, the original color can not be restored, so that a stable permanent mark can be formed on the product.

  It is believed that in the future, laser color marking patterns will be more complicated and diverse under the continuous innovation of these technologies. Exquisite decoration effects will give laser marking a broader application space and become a trend of laser processing applications.