Aim: To investigate the effects of cleaning products on stain removal.

Hypothesis: That dry cleaning fluid will be more effective in the removal of chocolate stains on calico, than environmentally friendly soap will.

Method:

A) Equipment

• 10 10cm x 10cm squares of white calico
• cotton buds
• dry cleaner fluid
• environmentally friendly soap
• 100 grams of melted chocolate
• water

B)

1. Collect the equipment needed
2. Lay each of the calico squares out and identify half as "dry-cleaner" and half as "soap"
3. Pour one teaspoon of chocolate onto each square
4. Leave chocolate to set for 10 minutes
5. Using the cotton buds, rub the soap onto 5 of the squares around the stain in a circular motion
6. Stop rubbing after exactly 5 minutes
7. Repeat with dry cleaning fluid
8. Record results