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The diazo photosensitive paper is a type of coated paper coated with a sensitizer and a color former, and the former can be decomposed under light irradiation. Both of these agents react under alkaline conditions. Therefore, in order to maintain the quality of the paper, it has been made of acid paper. However, used acid paper can only be processed into newsprint and high-quality toilet paper.
Neutral paper completely overcomes this defect, and its greatest feature is that it can be recycled together with other neutral paper such as copy paper, and reprocessed into copy paper, achieving multiple recycling of paper. The test results show that this neutral paper is comparable to the acid paper used in the past.
Japan's domestic market for diazo photosensitive paper is currently about 12 billion yen, and Ricoh has the largest share. In the future, with the launch of this new product, its market share may increase further.
Japan’s Ricoh Corporation announced today that it has successfully developed a neutral diazonium-sensitive paper that can be recycled in the world.