Variations for Eggshell | Sodium Alginate composite


Eggshell | Sodium Alginate composite

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Step one

Clean and rinse 10 grams of eggshells with soap.

Step two

Boil the eggshells for 20 mins at the boiling point.

Step three

Put the eggshells in the oven for oven-dry at 250 F for 15 mins.

Step four

Leave the eggshells in room temperature to let it cool down before grinding it into fine particles.

Step five

Mix 50 ml of water and 1 gram of sodium alginate. Put the mixture in Microwave 900w for 30 seconds then stir it together.

Step six

Do step 5 twice to help mixing ingredients. Leave it at room temperature for at least 30 mins

Step seven

Grind 3 grams of calcium pills into powder.

Step eight

Add the calcium powder, eggshells and 1 tablespoon of safflower into the water and sodium alginate mixture.

Step nine

Stir the mixture together and pour it into a silicone mold.

Step ten

Leave the mixture to set for 10 mins then gently pour 5 ml of vinegar on the surface of the mixture.

Step eleven

Leave it for 1 hour then start to bend the mold to allow vinegar to react at sides of the mold.

Step twelve

Flip the composite to allow vinegar to react at the different side. Leave for another 1 hour.

Step thirteen

Rinse the composite sheet with cold water and leave it to air-dry for 2 days.