Because of the wide application of fax machines, many work files are transmitted through this quick method, and most of the fax papers use thermal paper. When such a fax file is placed too long, the above text will naturally fade away. If you encounter some documents that involve economic benefits, it will lead to many economic entanglements. In order to deal with such entanglements, it is usually necessary to reproduce the fax paper. content.
Because the characters and blanks on the fax paper are somewhat in the same plane and the special features of the fax text, the fax content cannot be reproduced by the indentation method or the chemical processing method, but the conditional local video discriminator can be flashed again. For the lack of equipment in the base unit, the following describes a simple and easy way to reproduce the thermal paper content - fax machine heat treatment.
Once there was such a case, a unit once sent a signed agreement (fax document), the other party caused a dispute due to the payment of goods, because the time is too long, the fax document is blurred at the time, to clarify the truth , need to reproduce the fax content. The sample is a sheet of thermal paper. The paper is lubricated and has fold marks. There is a symbol of blue and black ink on the left side of the sample. The whole paper is similar to white paper. After being processed by the copier heat treatment method, the contents of the commitment agreement, the consignor, and the person to be entrusted are more clearly reproduced.
So what is the principle of this heat treatment method for reproducing the contents of thermal paper?
Thermal paper is made by applying chromonic materials (the main components of which are leuco dyes and phenol or other acidic substances) to a common paper base. When the fax machine transmits the graphic information, it records that the temperature rise of the luminescent material in the heat-sensitive coating reacts with the color of the color (usually black) after the temperature rises and the touch of the fax paper, but the blank that is not touched by the recording head does not The color reaction is reflected, so that the fax civilization with black letters on white is displayed.
Because the generated black matter is not stable, the long strokes will fade away, and the chromophoric substances that are not resounding will be relatively stable and fade slowly. When the thermal paper is treated again by the heat treatment method, the blank which has not been resonated with color is somewhat resounding due to heat, showing a black color, and some of the original faded texts are not changed much, and then the documents forming the black background are black. . The copier heat treatment method is the use of thermal paper. After preheating the copier, the fax paper to be reproduced is input from the copier paper feed port (the text is slightly up), and the thermal energy of the copier is used to heat the thermal paper. Perform uniform heat treatment to reproduce the fax content in white on a black background.
Top Electronics specializes in the production, wholesale and customization of thermal paper. The product types include POS machine printing paper, cash register paper, ATM receipt paper, self-adhesive thermal paper, etc., which are widely used in banking, communication, retail, and service. Enterprises and other institutions.
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