stain removal test

independent variables - the brand of pre-wash stain remover

dependent variables - how much of the stain is left after one wash

control variables
- size of white cotton cloth
- equal stain size
- same wash time and temperature

still thinking :)

I think I'm gonna do the stains testing experiment for my srp. but i heard a lot of people did it last year. so it's not exactly unique/different :(
I could either test:

- different types of stains on the same type of material. e.g. wine, chocolate, oil etc. on a plain white cloth

- the same stain on different types of material. e.g. oil on denim, plain white cloth and silk?

- or both <--- i want to do this one but it means more work

It's been a while since I last posted.. ugh
Anyways, I came up with two more possible ideas

1. Which brand of stain removing powder thingo works best. I guess this would be fun-ish. I would need to create my own stains. e.g. common stuff like oil, make-up, paint/highlighter/pen marks :L

2. If the wavelength of light affects the growth of plants. In this case, I'll get different coloured cellophane to wrap around eCh plant. It'll act as a kind of filter...

do you need to reference here? just in case... i got those ideas from http://community.boredofstudies.org/129/year-10-school-certificate/199377/science-student-research-project-any-ideas/2.html
rofl

If i were to pick one of the two, i would probably do number 1 because it seems less boring :S

I'd still rather do the hand sanitisers one but there is no way i can do that. Reasons are:
- I have no microscope nor am i gonna buy one just for this
- I don't know how to get just common hand bacteria to test, because you can't really grow mould to test this. I don't think you would normally have mould on your hands anyway