Experts have revealed a new type of paper that can be erased and rewritten without the need for ink. They say that even in early prototypes, this type of paper can be rewritten 20 times without affecting its resolution. Its working principle is to use a dye made of ultraviolet light, except that it is used to constitute the text part of the paper. The new rewritable paper can be repeatedly erased and written more than 20 times without significant loss of contrast or resolution. Yadongyin, the chemistry professor who led the research, said: “This kind of rewritable paper does not require additional ink printing, making it economically and environmentally feasible.”
The reaction can be accelerated at a high temperature of 115 degrees Celsius so that the erasing process can be completed in less than 10 minutes. He said: “The text printed at room temperature can maintain a clear high resolution for more than three days, which is long enough for practical applications such as reading newspapers. Even better, we rewrite paper for simple production. The production cost is low, the toxicity is low, and the energy consumption is low. The paper does not cause problems when heated to 115 degrees C. With a conventional laser printer, the paper has been heated to 200 degrees Celsius to obtain the toner particles adhered to the paper surface."

Thermoplastic Polyurethane TPU Shoe Sole

Thermoplastic Polyurethane Tpu Shoe Sole,Polyurethane Shoe Insole Tpu,Polyurethane Resin Shoe Sole,Tpu Resin Strap Shoe Sole

Xuchuan Chemical , https://www.xctpu.com