Preparation of neutral-colored polymethylmethacrylate molding material

(57) Abstract: The present invention is then molded material having a high transmittance in a yellowing as impressions at the edges of the produced sheet material is not allowed at all observed tint or yellow neutral color the field of products especially the basis of polymethylmethacrylate (PMMA). Effect is achieved after completion of the polymerization by the addition of 5~50ppm inorganic phosphorus compounds reducing action, in this case, the content of bluing agent may be reduced to less than 10 ppb, thereby the final product, and food it may be used for applications contacting.