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Biodegradable plastics in humid/wet areas

by Julie Pedersen


Dear Green Plastics

In relation to my current school project, I have been searching your site a lot, and it have been a great help. I still stand with a couple of questions though.
First of all, I have read a lot about the degration time of biodregadable plastics, and how they will degrade faster when exposed to moisture. If my product was to be used in water (for a short period of time), is biodegradable plastic then usable?
I have also been reading a bit about some additive which can make normal plastics biodegradable by only adding 1% additive.
Can you tell me what this additive is (the components, how it works etc.) and if it is possible to produce this kind of plastics yourself?

Thank you

Comments (2)

  1. Green Plastics says:

    Hi Julie!

    One way to make home-made bioplastic more water resistant is to coat it with something that is a naturally water-resistant material. For example: you can coat it with wax, or shalleck. This will allow your final product to still be totally natural and biodegradable… but will prevent it from deteriorating in water.

    The “additive” that is added to normal plastic to make is “biodegradable” is very controversial. Many people do not believe that it works: they think it allows the plastic to “break down” into small bits, but they say it does NOT really “biodegrade.”

    We talk a little about the controversy here:


    Good luck with your project!

  2. Green Plastics says:


    I almost forgot to mention, we have a more in-depth article about the idea of water resistant bioplastics that we have written before. Check it out here for more information:


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