Biodegradable Plastic Part 4

Setup:

Tools:
-bowl
-heat source (stovetop)
-measuring cup
-some mold (or metal tray with tinfoil)
-over mitt
-pan
-spatula
-rubber gloves

Ingredient Ratios:
21 water
3 starch
3 vinegar
3 glycerin

Steps

1. mix all ingredients

2. stir the bowl until the solution appears as a solid white (similar to the color of milk)

3. stir the bowl above a pot of boiling water until it's thick with high viscosity
(takes between 6-10 minutes depending on size of batch)

4. pour the solution into the plastic mold or covered metal tray

5. leave in view of the sun, such as a window sill for 8 days

Results after 2 days: Failure

it seems that the given ratio of glycerin was too high and it appears to have become more of a gel like substance. though this is not the desired result it's by far the closest I've got, with a few more adjustments I think I can get a proper plastic. it regard to this "gel" substance it is very interesting, it's quite strong when compared to similar substances and i could see it being used in products such as:

pillows?
shoe soles?
fabrics?
kids toys?
coats?
to conduct or insulate heat?

keep in mind it's still 100% biodegradable