What stains clothes easily?

red wine, blood. blood wine.

Regular old detergent will take out all pop stains.

If you want something harder try grass, red wine, and dried blood.

Kool Aid.

Red Kool Aid is impossible to remove. Give that a try.

@ragingloli, Thank you for the suggestion, however, our professor won’t allow us to have alcohol or body fluids, for safety reasons. Thanks, though!!

Thanks, Kool-Aid is a great suggestion!

Coke. Dr Pepper.

Grape juice, beet juice( from a can of pickled beets), cartridge from an ink jet printer.

To answer the other half of your question, Goop Hand Cleaner is a pretty effective stain lifter.

Chocolate is a pretty good one. Hot chocolate, chocolate candy, chocolate ice cream, ground-in wet Cocoa Puffs. We used to have a rule in our house: If you’re going to throw up, don’t eat anything chocolate first.

Grass stains are pretty reliable. Put on your fresh white denim jeans and go sit on the damp lawn for a little while.

Black shoe polish.

Here’s one I’ve never understood: pencil marks. Graphite.

Or just throw one new red T-shirt into a load of white laundry.

[Edit] Oh, sorry, pop stains. Did you know that most of the world doesn’t know the term “pop” for a soda or soft drink? I’d bet any of the colored ones would be great, and especially the fruit flavors. I’d put my money on orange soda.

I agree with Kool-aid, grass, mustard, chocolate, marker… soda really isn’t difficult to remove. In fact, adding cola to your laundry may help to remove stains. :)

I agree with @ANef_is_Enuf, I use ginger ale as a solvent to clean stains on clothes without leaving much if any residue.

Sharpies

Humankind’s greatest invention

Dry-erase markers as well as Sharpies, which used to be called “laundry pens.”

Not anti-laundry pens?

Ink is a great suggestion and I know what gets it out: hairspray.

@ANef_is_Enuf, how much of what kind of cola do you add to an average laundry load?

@jaytkay, in my opinion that distinction belongs to adhesives.

@Jeruba I use ginger ale(the real stuff not the artificial) as a spot treatment pre wash stain remover. It works best for protein stains in my opinion.

@Jeruba one can of regular cola added to laundry can be effective in removing grease stains.

Sugar sodas stain much worse than diet sodas.

Red punch juice.
Concord grape juice
printer toner that has been fused in
printer ink
chain grease

You can get grease with graphite and/or molybdenum disulfide. Nothing will get those out, guaranteed.

Oh, I´m the soap lady. Organic chemistry is my passion. I love all the suggestions here. Fruit stains cotton. Baby food with beta carotine is a good stainer. If you´ve ever dropped a really ripe pear on a white sweatshirt, the darn stain goes a poo brown colour. There are colourants in red koolaide that are used to dye fabrics. Instead of wine, you can use 100% dark grape juice. You should find it in a health food store, perhaps. Things with what is called “tannins” will stain. Look that word up and see what food and drink items contain that and what exactly it is.

If I were you, I´d test getting stains out using three or perhaps four different ´soaps´. Soap one would be like a bar soap, like Ivory or Sunlight. The second would be ordinary laundry powder, with no brighteners or non-clorine bleach. The the third method would include a per-soak in something that promises to be non-clorine whitener/brightener.(like NapiSan).. but the ingredient you are looking for is Sodium Percarbonate. Look up this compound and what it does. If you want to do a fourth method, CAREFULLY use bleach. Get a parent to help you with the bleach. It´s a strong chemical and needs to be treated with respect. To make test comparisons, remember to keep certain things a ´constant´ so that you have full control of your ´variables´. You´ll need to show that you understand scientific method in your experiment.

As a side display, I would look into what ´dry cleaning´ is and perhaps have a diagram showing what it is and how this method is used to clean clothing or even a diorama.

Good luck.