| Answer | Crossword Clue |
|---|---|
| colours | A substance used to give something a particular color |
| colorings | A substance used to give a particular color to something, esp. food |
| coloring | A substance used to give a particular color to something, esp. food |
| indicator | A compound that changes color at a specific pH value or in the presence of a particular substance and can be used to monitor acidity, alkalinity, or the progress of a reaction |
| indicators | A compound that changes color at a specific pH value or in the presence of a particular substance and can be used to monitor acidity, alkalinity, or the progress of a reaction |
| treating | Apply a process or a substance to (something) to protect or preserve it or to give it particular properties |
