1. Fire is a chemical action, or an action taking place between different chemical substances.

2. I am waiting for your early acquaintance and chemical action.

3. Caustic: Capable of burning, corroding, dissolving, or eating away by chemical action.

4. Curing: The rapid solidification of ink or varnish by means of chemical action.

5. Capable of burning, corroding, dissolving, or eating away by chemical action.

6. Active coupler : Coloring agent to initiate the formation of colour after chemical action.