| 摘要 |
PROBLEM TO BE SOLVED: To provide a mixed-type agent that is mixed into a photocatalyst solution for coloring in the application and spraying of the solution to improve its visibility, and makes the coloring of an object temporary.SOLUTION: The present invention provides an agent in which as a coloring liquid, thymol-phthalein, a pH indicator, is mainly used, instead of a pigment or a dye, and the thymol-phthalein is mixed with 1-10% phenolphthalein. The agent reacts with acidic components in the air to be colorless.SELECTED DRAWING: None |
