Powder for stones etching 100g

Etching Abrasive Stones with Ferric Chloride (FeCl₃)

Attention!

Etching helps clean and “open” the working surface of copper-tin (metal bond) abrasive stones, making them more aggressive and effective.

Preparing the Solution

Ratio:

• 100 g dry ferric chloride (FeCl₃)

• 200 ml of warm or hot water

Steps:

1. Use a plastic or glass container.

2. Add the ferric chloride powder.

3. Pour in water at a 2:1 ratio.

4. Stir until fully dissolved.

Safety Precautions

• Always wear gloves.

• Avoid inhaling vapors — wear a mask.

• Do not ingest or allow skin contact.

• While not highly dangerous, the solution should be handled with care.

Etching Methods

1. Full Immersion

Only for stones removed from the blank:

• Light etching: 15–20 minutes

• Deep etching: 30–40 minutes

2. Partial Immersion

For stones mounted on aluminum blanks:

• Fill the container to ~80% of the stone’s height

• Do not let the solution touch the aluminum

3. Surface Application

For careful etching without immersion:

• Moisten a cotton pad or sponge with the solution

• Apply to the stone every 20–30 seconds

• Total duration: 10–12 minutes

Warning: Contact with aluminum blanks will cause corrosion.

What Stones Can Be Etched?

Suitable for metal-bonded abrasives (copper, tin, or their alloys), including CBN and diamond stones.

After Etching:

1. Rinse thoroughly under running water. (If the reaction continues, baking soda can be used to neutralize it.)

2. If available, dress the surface lightly with silicon carbide.

3. Let the stone dry completely before use.