Step 1: Prepare sodium alginate solution.
6 grams of sodium alginate is mixed with 500 ml of hot water.
The less alkali in mineral water or boiled water, the better. After stirring for a few minutes, soak it for about 1 hour, stir it evenly and use it after it is completely dissolved.
Step 2: make calcium chloride solution.
30 grams of calcium chloride is mixed with 2 kilograms of water and cold water (tap water).
Step 3: Pour the completely dissolved sodium alginate solution into a small empty bottle and add the pigment.
Step 4: Brush the mold with a brush and soak it in calcium carbide solution for 5 minutes.
Step 5: After adding the prepared sodium alginate solution into the mold, soak the mold in the calcium chloride solution, gently shake it for a while, and the baby will come out and stay in the calcium chloride solution for five minutes. Just take it to clean water to raise it.
This method is too difficult. If it's for children at home, buy ready-made ones and pay attention to safety.