- - COLOR-CHANGING MATERIALS AND MULTIPLE COMPONENT MATERIALS HAVING A COLOR-CHANGING COMPOSITION

摘要

the present invention is color-change material, relates to the color relates to the multi-component material comprising a composition change. The color-change material and a color-changing composition can change color to indicate a change in state such as changes in pH. The color-change material and a color-changing composition comprises a hydrogel-forming composition, a coloring agent, and pH adjusting agents charged. The hydrogel-forming composition contains at least one of the charged species.