We can test the pH of things with cabbages. to make a cabbage test: Chop up a red cabbage and cook it with water until the water is deep purple. use two parts of cabbage per one part of water or so. When you've cooked up the purple water, then you can use it to make test paper or you can use it in liquid form. for liquid form- use 10 drops of cabbage juice per one tablespoon of the stuff you want to test. for paper- start with white paper and soak the paper in the purple water until it turns a deep purple color. You can soak it a number of times>>so that it gets nice and colored. And you can use coffee filters or paper towels or construction paper. After your test paper is colored and dried, you can put little drops of stuff on it to test the pH of things. You can use a toothpick to drop things on it. Or, a plastic fork is more scientific, especially if you break off all of the tines but one.. When you put stuff on the purple paper, it should turn colors similar to these: Your cabbage and colors may vary a bit from the above scale. You can fine tune your personal cabbage scale by testing known substances with it. 2.3 lemons 6.2 rain water (but this varies) 6.27-6.58 (perfect for most plant cultivation) avocados 7 (neutral) normal water and also sugar water 7.356 human blood 8.2 sea water (3% salt) 10.5 detergent 13.5 draino cleaners notice the exact pH for people? They say that the body will do harm to it's self in an effort to maintain an exact pH and that we should eat plenty of acidic fruits in order to maintain our alkalinity<how strange, but at least they both start with A. here are other common pH measurements: a big list of foods from the gov p.s. the above process (and possibly the actual ability to see the above process) is brought to you by little pieces of hydrogen and electricity