| Answer | Crossword Clue |
|---|---|
| RINSE | Hair-coloring solution |
| TONER | Coloring solution |
| DYE | Coloring solution |
| orcein | red dye, the principal coloring matter of cudbear and orchil, obtained by oxidizing an ammoniacal solution of orcinol |
| orceins | red dye, the principal coloring matter of cudbear and orchil, obtained by oxidizing an ammoniacal solution of orcinol |
| litmus | blue coloring matter obtained from certain lichens, esp. Roccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator |
