Research Green plastics, by E.S Stevens, Seaweed recipes, Materiom Materials library https://materiom.org/recipe/41
Any bubbles remaining will be in your final bioplastic sample. You can pop bubbles with a tooth pick or fork, or add in bubbles with a syringe.
Pour into your mould and leave for 2-3 days till its fully dry. Also if you want to add anything extra to your material, do this at this stage.
The result will be a bioplastic that is thin and translucent. I produced two sheets that were 30 x 30 cm in sixe.