Set-ups

Materials/Apparatuses needed 
- Lab thermometer
- SPINmatic detergent
- Mustard, Ketchup, Coffee and Egg (For making of stain)
- 18 pieces of fabric (5cm x 5cm)
- 12 small plastic containers/ bowls
- Teaspoon
- Tap water
- Colorimeter
- Lemon juice (To decrease pH of medium)
- Baking soda (To increase pH of medium)

Experiment 1: (Concentration of detergent in medium)
Set-up 1- Recommended Concentration
Set-up 2- 1/3 less than recommended concentration
Set-up 3- 2/3 less than recommended concentration
Set-up 4- 1/3 more than recommended concentration
Set-up 5- 2/3 more than recommended concentration
Set-up 6- Control: No water and no detergent

All set-ups (except for control) will contain 100ml of water and will be at room temperature (at around 25 degree celsius) 1/2 teaspoon of stain containing mustard, ketchup, egg and coffee will be applied on each piece of fabric of 5cm x 5cm of each set-up. All 6 set-ups will sit in the mediums of different concentrations of SPINmatic detergent overnight before the fabric pieces are taken out. A colour scale will be used to measure the colour intensity of stain left.

Experiment 2: (Temperature of medium)
Set-up 1- 10 degree celsius
Set-up 2- 25 degree celsius
Set-up 3- 40 degree celsius
Set-up 4- 55 degree celsius
Set-up 5- 70 degree celsius
Set-up 6- No water and no detergent

All set-ups will contain 100ml of water and 1/2 teaspoon of SPINmatic detergent. 1/2 teaspoon of stain containing mustard, ketchup, egg and coffee will be applied on each piece of fabric of 5cm x 5cm of each set-up. All 6 set-ups will sit in the mediums of different concentrations of SPINmatic detergent overnight before the fabric pieces are taken out. A colour scale will be used to measure the colour intensity of stain left.

Experiment 3: (pH of medium)
Set-up 1: pH 2
Set-up 2: pH 4
Set-up 3: pH 7 (Neutral- pH of water)
Set-up 4: pH 9
Set-up 5: pH 12
Set-up 6: No water and no detergent

All set-ups will contain 100ml of water. Lemon juice or baking soda will be used to increase or decrease the pH of the medium. 1/2 teaspoon of SPINmatic detergent will be added into each of the set-ups. 1/2 teaspoon of stain containing mustard, ketchup, egg and coffee will be added onto all 6 pieces of fabric of 5cm x 5cm. All 6 set-ups will sit in the different pH mediums overnight before the fabric pieces are taken out. A colour scale will be used to measure the colour intensity left.