Often combined with other treatments to make paper that resists both heat and liquid. 🥚 DIY Alternative (Make Your Own) If you can't buy it, you can extract it from eggshells : Roast washed eggshells in a pan until slightly browned. Grind them into a fine powder.
with an acid (like vinegar) to create a calcium solution, or react with phosphoric acid to specifically yield calcium phosphate. where to buy calcium phosphate
If you are following a standard "hand-made paper" recipe, you likely need calcium carbonate instead. 🔥 Why use Calcium Phosphate in paper? Often combined with other treatments to make paper
Good for finding ACS (high purity) grade powder in small quantities from chemical resellers. Scientific & Research Grade: where to buy calcium phosphate