Our couple hand model diy hand model contains sodium alginate. It can record the growth process fine capture every fine line and fingerprint so that you create a more perfect product is a kind of love witness. It is simple to use: add the clone powder and water in a bucket with a mixing stick stir it evenly put your hand in the solution for 3-5 minutes let it change color and set then gently shake your hand and take it out. Add the molding powder and water to another bucket and mix well with a mixing stick. Pour the mixture into the mold and pat the edge of the bucket to reduce air bubbles. Wait for more than 30 minutes to cure before peeling off the clone layer. After peeling process and color with sandpaper as needed. Perfect for teens adults couples and friends to create priceless memories together it's a great choice for gift-giving.