The Effect Of The Method Prior To Washing a Shirt On The Opacity Of The Stain

Student: Sadie Betz
Table: 14
Experimentation location: Home
Regulated Research (Form 1c): No
Project continuation (Form 7): No

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Research Plan:


  1. Gather all materials 

  2. Place your shirt so it is flat and right side up on a smooth surface. 

  3. Cut along the sides and seams of the shirt so you seperate the front and the back. Do this to all of the shirts.

  4. Take all four fronts and backs of the shirts and lay them out so they are flat.

  5. Draw a box in the middle of each shirt about 3 inches by 3 inches. 

  6. Next take your grass and fill a small bowl with water. Place the grass in the bowl and let the grass sit for about 30 seconds then pour all the water out but use your hand to stop the grass from coming out

  7. Take a pinch of grass and rub it onto the shirt repeat for all of them 

  8. Label each shirt with either toothpaste, washer, vinegar, or shaving cream. Make sure each of your shirts has a title.

  9. Make sure to measure the opacity of the stain before. 

  10. Once all that is done leave your shirts to sit for 24 hours.

  11. Once 24 hours has passed take one of your shirts that says washer and place it in the washer and set the water to warm and do a normal wash cycle, and use a tablespoon of detergent. 

  12. While that is washing, take one of your other shirts that is the vinegar shirt and place it so it is flat. 

  13. Next take your baking soda and place about a teaspoon of it onto the stain. 

  14. Next take your baking soda and place about a teaspoon of it onto the stain next take your vinegar and do the same and then scrub it with a toothbrush for about 1 min (it will help if you dip the tooth brush into vinegar occasionally) 

  15. Then once the vinegar is scrubbed into the stains, take the shirt and place it in the washer when your other shirt is done  and make sure you wash it the exact  same way as the first shirt 

  16. Take the first shirt out of the washer and hang it up to dry

  17. Now you can take another shirt the shaving cream one and take you shaving cream and spray some out onto the shirt, then you can rub the shaving cream into the shirt  and then let it sit for about a 5 min 

  18. When 5mins is up rinse the shirt

  19. Then after that put the shirt  in the washer and make sure you wash it the same as the other two

  20. Find your last  shirt that says toothpaste and squirt a dollop of toothpaste onto the stain

  21. Now you are going to take your lemon and cut in half and take one of the halves and squeeze it into a bowl you should have about ⅛ of a cup

  22. Now take the other half and do the same thing this should bring you to about ¼ cup of lemon juice 

  23. Now dip your toothbrush into lemon juice 

  24. Scrub the stain with a toothbrush for  about 1 min and periodically re dip your toothbrush into lemon juice 

  25. After you have scrubbed the shirt for 1 minute you can take some baking soda and sprinkle a little on top and scrub and let sit for 5 min then rinse

  26. Take the shirt and put it in the washer and make sure to wash it the same as all the other shirts 

  27. Once all the shirts are washed and are dry  you can get out your opacity chart and measure the opacity of the grass stain for each method and determine which one worked the best. Make sure to measure the darkest spot of the stain 




Questions and Answers

1. What was the major objective of your project and what was your plan to achieve it? 

       a. Was that goal the result of any specific situation, experience, or problem you encountered?  

       b. Were you trying to solve a problem, answer a question, or test a hypothesis?

My main objective was to find out way to get a grass stain removed because I play a lot of sports and i always find myself with grass stains on my clothes and I was wondering what get them out the best. 

2. What were the major tasks you had to perform in order to complete your project?

       a. For teams, describe what each member worked on.

I did not have a team I conducted my experiment by myself so I did everything by myself so I had to write and conduct my experiment. 

3. What is new or novel about your project?

       a. Is there some aspect of your project's objective, or how you achieved it that you haven't done before?

       b. Is your project's objective, or the way you implemented it, different from anything you have seen?

       c. If you believe your work to be unique in some way, what research have you done to confirm that it is?

Something that was unusual about my project was the fact that i included some different ways of cleaning the shirt like for example with shaving cream instead of stain removers. 

4. What was the most challenging part of completing your project?

      a. What problems did you encounter, and how did you overcome them?

      b. What did you learn from overcoming these problems?

One of the problems I found was the time it took to wash all the shirts and I was not able to fix this in the moment so I just had to wait, but if I was to try again I would have rinsed all the shirts in water first so I would be able to wash them all together and would save time. 

5. If you were going to do this project again, are there any things you would you do differently the next time?

If I was going to do this project again I would have found a different was of getting the grass color into each shirt because it was really hard to get all the stains to be about the same size and opacity. 

6. Did working on this project give you any ideas for other projects? 

When I was doing this project I did start to wonder if shaving cream would be the best solution to get other stains out, like tomato sauce or marker. 

7. How did COVID-19 affect the completion of your project?

COVID did not affect my project what so ever, because this was a project I was able to do on my own with house hold materials.