Abstract: The present disclosure provides a transparent screen including two main surfaces, and out of light of which a wavelength incident on one main surface out of the two main surfaces is 532 nm, a half width of a peak observed in a distribution indicating strength with respect to a diffraction angle of a primary diffraction light emitted from the other main surface out of the two main surfaces is 2 degrees or greater.

Abstract: Preservable granular particulate "tofu" (soybean curd), which is smooth and does not liberate water during storage and therefor is suited to an alternative for salad topping, tofu spread and scrambled egg, can be produced by coagulating soybean milk or soybean protein paste in heated oil at a temperature between above 75.degree. C. and below 140.degree. C. The soybean milk is of a higher concentration than that conventionally used for producing ordinary tofu. Hardening of the granular tofu which is caused with increased solid contents can be overcome by elevating the pH of the paste as compared with that used in production of ordinary tofu. A small amount of egg white is desirably added to coagulate the soybean milk smoothly in a shorter period of time in heated oil. The granular tofu thus prepared is preservable and does not liberate water during storage, because the coagulation is done at a higher temperature than in the case of ordinary tofu, and the surface of granule is covered with an oily film.

Abstract: Raw food materials, having a 10-65% water content, are ground between two opposing disc grinding members. The opposing discs are concave to form a central hollow portion therebetween having a nearly trapezoidal cross section.