brenda :D
Year 10 STGGHS
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13.
Thursday, May 135:03 PM
Edited some parts but still not entirely satisfied :/
Method: 1. Cut material into 20, 5cm by 5cm, squares and take a photo of one cloth 2. Label each piece with the name of each pre-wash stain remover and the stain, in the corner 3. Measure 3ml of Vegetable Oil and pour onto center of cloth 4. Use an eyeliner pencil and draw a 3cm diameter circle with a compass, on another cloth 5. Squeeze a dollop of tomato sauce and rub it into the third cloth 7. Repeat steps three to six, 4 more times. There should now be 5 of each stain, totaling to 20 cloths all together. 8. Let the stains soak in overnight 9. Take a photo of each cloth, the next day, with the same light conditions (In a dark room with only camera flash etc) 10. Spray the Woolworths Homebrand Pre-Wash Stain remover on each of the 4 stains and leave it for 5 minutes 10. Repeat with the other solutions 11. Leave 4 stained pieces of material as a control 12. Place all 20 pieces into the washing machine with the setting as quick warm wash (results may vary depending on the washing machine) and wash as normal 13. Take it out and hang on the clothes line for 2 hours 14. Take another photo of each cloth in the same lighting conditions 15. Upload each individual photo of before and afters 16. Open up a photo editing program such as photoshop and use the eyedropper tool on the middle of each stain.Computers define color by measuring the amount of red, green, and blue in a pixel on a scale from 0 to 255. If the amounts of red, green, and blue in a pixel are all 255, then the pixel is pure white. 17. Add the numbers up for each picture and compare. The one with the greatest red, green and blue number difference between the before wash and after wash picture is the best pre-wash stain remover 16. Record numbers and pictures in the table below
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