How to Remove Chalk (Plumber's Chalk or Construction Chalk) from Carpet

Construction chalk (also called plumber’s chalk) is used on a cord that is strung tight between two posts and then snapped against a surface to create a straight line. Chalk is comprised of calcium carbonate and contains an insoluble dye that is added for visibility. Often this dye is permanent and cannot be removed. The following instructions may remove it, but you should not guarantee removal to your customer.

Directions – Basic Method:

1. Using a vacuum with an agitating brush, vacuum the area thoroughly.
2. If no agitating brush is available on your vacuum, use a bone spatula between vacuum passes to work up some of the chalk.

Directions – Advanced Method:

1. Vacuum area thoroughly.
2. With a trigger sprayer, apply undiluted Matrix Target Tannin Stain Remover to spot.
3. Agitate area with a bone spatula. Tamp and blot with a spotting brush and clean white spotting towel. Let dwell for 15 minutes
4. Agitate once more with a bone spatula and rinse well with water.
5. If a little of the spot is remaining, apply Matrix Advanced Stain Remover diluted at equal parts of solution A & B to spot. Place a damp white towel to spot. Using a steam iron set at its lowest steam setting, apply pressure for about 10 seconds. Check towel for transfer. Continue until the spot is gone. USE CAUTION THIS CAN REMOVE THE COLOR FROM THE CARPET.

Warning: Always test materials for colorfastness, follow label directions, and never mix products unless specified in the label directions. Each situation reacts differently and results may vary.