Easy Biodegradable Plastic

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Introduction: Easy Biodegradable Plastic

About: I make K'nex guns, specializing in semi-automatic, RBG-Slingshot hybrid systems which i use in most of my guns. Note: I am not responsible in any way for any damage, injury, or death caused by my Instructable…

Now lots of products are made out of plastic. A lot of it is throw away and will stay in garbage dumps of thousands of years. Biodegradable plastic, unlike normal plastic made from petroleum, will decompose and become part of the soil. This Instructable will show you how one easy way to make some biodegradable plastic.

Step 1: Gather the Materials

This are lists of materials and tools needed to make the biodegradable plastic:

Materials:
-Corn Starch
-Water
-Cooking Oil

Tools:
-Spoon/Something To Measure With
-Microwavable Container
-Microwave

Step 2: Proportions

The proportions to make the plastic are:

1 TBSP Corn Starch: 1.5 TBSP Water: 3-5 Drops Cooking Oil

Step 3: Preparations

Mix the ingredients together to form a milky looking liquid. Once you have done this it is ready to be microwaved.

Step 4: Microwaving

Put the mixture in the microwave and set the microwave on high for 25-30 seconds. The mixture should start to bubble and should become slightly transparent. Keep an eye on the mixture to make sure nothing goes wrong.

Step 5: Molding the Plastic

When it looks slightly transparent, take it out. Let it cool a bit so you can handle it. Then knead the plastic until it is soft and can be molded like play-dough. Now you can mold it into whatever shape you want it to be. Once molded leave it for about 24 Hrs. for it to cure and become solid. It's best to keep the surface from drying out while it is curing. The image below is the plastic when shaped.

Step 6: Ideas

-You can add food coloring to give the biodegradable plastic some color.

-You can use it to make plant pots so you start the plants indoors and when they've grow you can put them in the ground.

1 Person Made This Project!

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77 Comments

0
msminnamouse
msminnamouse

4 years ago

Thanks! This is perfect for what I need!!!

0
acacia.s4913
acacia.s4913

Reply 7 weeks ago

same ;)

1
Dwonder148
Dwonder148

Question 1 year ago on Step 3

How long does it take this "home-made biodegradable plastic" to decompose/break down?

1
PurpleMarshmellow
PurpleMarshmellow

1 year ago

I'm trying this out rn idk if it will work, I'll post a pic of the end result. Btw I'm just trying this out 11 years later after you posted this recipe lmao

0
bryscrow10991
bryscrow10991

Question 1 year ago

What can I add to make this more durable?

1
christina mae beane
christina mae beane

6 years ago

Once it dries, will it be transparent??? PLEASE ANSWER!!!!!!

0
bryscrow10991
bryscrow10991

Reply 1 year ago

No. It will harden though.

0
MateoCR06
MateoCR06

Question 1 year ago

Can you eat it?

0
Severin Dudley Symmes
Severin Dudley Symmes

Question 1 year ago

Is there a way to make it flexible, similar to dried silicon sealant?

1
nibba123456
nibba123456

Question 2 years ago on Step 4

i dont have a microwave, can i use a bunsen burner??

0
Gruonabike48
Gruonabike48

Answer 2 years ago

I don't know but why don't you have a microwave?

0
Gruonabike48
Gruonabike48

Question 2 years ago

When you make it can it be molded to be like plastic bottle or can six pack rings? Would it be flexible enough to work as one?

0
aidanthepro512
aidanthepro512

Answer 1 year ago

yes i made a six pack rings 2 weeks ago it not perfect tho

0
dylcalhoon
dylcalhoon

Question 1 year ago on Step 6

How transparent does the final product come out?

2
Frankenbride
Frankenbride

2 years ago

I made this and was looking for transparency. I got quite a bit of shrinking, which I think I could remedy with the OP's suggestion of damp paper towel. But mine never became transparent. This is an "I made it!" photo. How can I get it to be this transparent? Muhassan, are you still here?

gel.jpg
0
bigoof
bigoof

2 years ago

recommend putting in a plastic piping bag with a round tip if you have trouble using it.

0
PaulinaD9
PaulinaD9

2 years ago

Has anyone tried putting it in wet soil and see how long it takes to decompose? If not, I'll try to make it this weekend and see what happens.

0
Gruonabike48
Gruonabike48

Reply 2 years ago

No i have not