Glue, in all its various formulations, is an indispensable part of many craft projects. For the true DIY enthusiast, however, the glue itself can be a craft project. Though homemade glues cannot replace store-bought adhesives for all applications, they can be much less expensive to acquire and are suited to a wide range of potential applications.
Place two cups of water on the stovetop over medium heat. Bring to a gentle boil; if it starts to bubble vigorously, turn the heat down.
Measure one teaspoon of salt into the water. Stir until it dissolves.
Take a pinch of flour in your fingertips and sprinkle it into the water with one hand. With the other hand, whisk the flour in the water to mix it and prevent lumps.
Add more flour, a pinch at a time, and continue to whisk as you go. After you've added about 10 pinches, watch while you whisk between each new pinch of flour to see how thick the mixture gets.
Place the finished paste in the refrigerator to cool. Use to glue paper and other fibrous materials. Store unused portion in the refrigerator.
Measure 1 tablespoon of cold water into a small bowl. Sprinkle the gelatin over the surface of the water. Let the gelatin soften; consult the packet instructions for how long it's recommended to wait.
Microwave 1 1/2 tbsp. of milk in a separate bowl. Heat on "high" for 30 seconds.
Pour the boiling milk into the gelatin mixture. Whisk.
Let the glue cool and refrigerate when not in use. Use this as a craft glue; it will harden to be water-resistant.