Myself Suksakaow Mahuttanatan
Add 3 grams of glycerol to 40 ml of water and stir them together. Then add 2 grams of Agar Agar to the solution.
Rinse and clean the eggshells before cooking them for 10 mins at boiling point.
Pre-heat the oven at 250 Farenheit for 5 mins. Put the eggshells in the baking tray and oven-dry them for 15 mins. Leave the eggshells to cool down before grind it into small fragments.
(optional step) Prepare a dye by mixing 20 ml of water and 0.25 ml (5 drops) of food coloring (I used one which had the ingredients of Water + Carmoisine + Ponceau 4R + Tartrazine + Citric acid). Soak the eggshells in dye solution for 5 mins before rinse it with cold water and leave it to air-dry. I used the food colouring to dye the eggshells a pink/red colour.
Heat up the solution you prerpared in step 1 (water, glycerol, agar agar) on the stove and keep stirring.
Add 2 grams of wild bilberry powder into the solution and keep stirring until the solution mixed well. The wild bilberry powder gives the material a granulated texture and purple color to the agar mixture as a sort of natural dye.
Leave the solution in room temperature to cool it down before adding dyed eggshell fragments.
Pour the mixture in a silicone mold and put it in microwave 900 w for 30 seconds. The microwave decreases the setting time of agar, it make the mixture thicker and form into shape much faster.
Leave it for at least 20 mins before separate from the mold.
After 1 hour, the material test will be solid, but I leave it overnight ( 8 hours ) for it to be completely dry (this depends on the temperature and humidity of the place you are drying it).