Make your own glue

This is a recipe from a science teacher:


Making our own glue!

Here's How:

1. Mix 1/2 cup of milk with 1 T of vinegar. The milk will begin to separate into solid curds and watery whey. Continue stirring until the milk is well-separated.
2. Pour the curds and whey into a coffee filter positioned over a cup (or paper towel). Slowly lift the filter, draining the whey. Keep the curd, which is in the filter.
3. Squeeze the filter to remove as much liquid as possible from the curd. Discard the whey (i.e., pour it down a drain) and return the curd to a cup.
4. Use a spoon to break the curd into small pieces.
5. Add 2 teaspoons of warm water and 1 teaspoon baking soda to the chopped curd. Some foaming may occur (carbon dioxide gas from reaction of baking soda with vinegar).
6. Mix thoroughly until the glue becomes smooth and more liquid. If the mixture is too thick, add a bit more water. If the glue is too lumpy, add more baking soda.
7. The finished glue can vary in consistency from a thick liquid to a thick paste, depending on how much water has been added, how much curd was present, and how much baking soda was added.
8. Use your glue as you would any school paste. Have fun!
9. When not in use, cover your cup of glue with plastic wrap. Over time, its consistency will become smoother and more clear.
10. Unrefrigerated glue will 'spoil' after 24-48 hours. Discard the glue when it develops a spoiled milk smell