Question

Is an age old custom to start a new era commemorate a special event

Answer 1

Answer:

Explanation:

Acid staining is a finishing technique for concrete that mixes water, hydrochloric acid, and acid-soluble metallic salts. This mixture penetrates and chemically reacts with the hydrated lime in the concrete. The stain lightly etches the concrete surface, which allows the metallic salts to penetrate easier.