| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming a uniform-quality surface film which is not deteriorated by an influence of a chemical reaction of a light-accumulating pigment with another substance in contact therewith, since the necessity of coating the light-accumulating pigment lies in which the light-accumulating pigment has its light-accumulating action only in a neutral environment, loses its light-accumulating action by the influence of mixing with a non-neutral binder and loses water resistance, and the surface of the light-accumulating pigment therefore needs to be coated with a suitable material in order to prevent such an unnecessary reaction.SOLUTION: Operations of emitting materials upward against the gravity are continuously carried out; when materials earlier emitted lose its energy and fall down by the gravity, the materials collide with and contact with successively emitted materials; thereby, the difference in the mixing condition due to the difference in the specific gravity between substances having specific gravity differences is eliminated, and the materials are uniformly mixed to thereby form uniform films. |
