| 摘要 |
PURPOSE:To improve oxygen sensing performance and shelf stability by adding an opacifying agent to a compsn. consisting of methylene blue, a reducing saccharide, a basic material and aluminum hydroxide. CONSTITUTION:Aluminum hydroxide is added to a compsn. consisting of methylene blue, a reducing saccharide, a reducing agent and an additive such as an excipient to improve a shelf stability and further an opacifying agent is added thereto so that a bright color tone is obtd. in the stage of coloration. The aluminum hydroxide added and mixed therewith an opacifying agent, for example, a white pigment such as titanium oxide, zinc oxide, antimony oxide, or lithopon is used as a carrier in the above-mentioned way, whereby a dark color of an oxidation reduction dye, for example, dark blue is opacified and can be changed to a bright, distinct, and easily visible color. The opacifying agent is added according to the need for a desired color tone. |
