There are several ways to activate slime, depending on the recipe and ingredients used. Some common slime activators include:

• Borax: Borax powder is the most widely known slime activator and contains borax or sodium tetraborate. It is often used in slime recipes, but it has some controversy surrounding it.

• Baking soda: Baking soda can be used as a slime activator by mixing it with contact lens solution or water.

• Contact lens solution: Contact lens solution that contains boric acid and sodium borate can be used as a slime activator.

• Liquid starch: Liquid starch can be used as an alternative to borax in slime recipes.

• Warm water: If your slime has dried out, you can moisten it with warm water to reactivate it.

When a slime activator is combined with a polymer, such as clear or white PVA glue, a unique chemical reaction occurs, creating the signature slime texture. Its important to note that some liquid starches contain a form of borax, so its important to check the ingredients before using it as an activator.