Picture of Plastic Milk
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I was trying to find a recipe I could use to produce a chemical reaction for the Mad Scientist contest and the chemical reaction contest. I came across this one and thought is was interesting. For this tutorial I will be making Plastic milk.
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Step 1: Recipe

Picture of Recipe
Recipe ingredients:
  • 2 Cups Milk
  • 2 Tablespoons white vinegar
This recipe came from here:

It is very helpful to view this video so you can see the process of making plastic milk.

It is a quick and easy project.

Step 2: Utensils

Picture of Utensils
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Utensils needed:
  • Liquid measuring cup
  • Measuring spoons
  • Coffee filters to absorb the liquid
  • Fine weave strainer
  • Spoon
  • Plate
  • Pan
  • Cookie cutters
  • Skewer not shown
  • Wax paper not shown, line the plate with wax paper.

Step 3: Measure/ Heat

Picture of Measure/ Heat
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  • Measure 2 cups milk and set aside.
  • Measure 2 Tablespoons white vinegar and put it into a small glass reserving until later.
  • Line the strainer with 2-3 coffee filters or paper towels.
  • Line the plate with wax paper.
Pour the milk into the pan and heat on stove. Do not boil! Heat until almost too hot to touch but not boiling
  • Add vinegar.
  • Stir gently.
  • Allow it to separate into globs.
  • Stir again.

Step 4: Strain

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Remove from the stove:
  • Place strainer in sink.
  • Pour Contents into the lined strainer.
  • Allow to drain a couple of minutes.
  • Carefully pull up the filter and gently press with your fingers to remove liquid from ball.
  • You might need to place it in another doubled coffee liner and squeeze again to remove excess moisture.
  • It should begin to form a paste.
  • Let it set 5 minutes.

Step 5: Molding

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  • Gently roll the plastic in a tight ball.
  • Gently press flat to form shapes.
  • This part is tricky you need to work with it and try to keep it together nicely.
  • You accomplish this by pressing down and pulling toward the center with your hand.
  • Using the cookie cutters make the shapes.
  • Form a couple of balls if you desire.
  • Using the skewer poke holes where you want if you are going to make jewelry.
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dragon fllyer2 months ago

What this really is is cheese...

This recipe is false, but with a spoon of caustic soda, this recipe became a real plastic, the galatite.
gravityisweak7 months ago

Ok so I'm curious. If you start with milk, and add vinegar then remove the casein, what do you have left? Is it still milk? Or milky vinegar? Or something new altogether?

sunshiine (author)  gravityisweak7 months ago
Hmmm, the best I can describe it would be a jell-0 type of substance that is not completely set up. It is still very soft and mushy but as it dries it firms up. At this point one could not make a shape from it because it will not hold. Hope this helps. Thanks so much for stopping by and do have a splendorous day.
EmiClarice9 months ago
Then, I looked at this instructible and saw what I did wrong. Thank you!!
sunshiine (author)  EmiClarice9 months ago


EmiClarice9 months ago
OMG I remember doing this in a science after school program! Mine turned out like feta cheese.. :)
sunshiine (author)  EmiClarice9 months ago

Yes, it is a lot like feta cheese but if I recall I kneaded it a little to form a ball. Thanks for stopping by and commenting and do have a great weekend.


Is it edible? Just asking...

sunshiine (author)  akshat210451 year ago
No it is not edible. Thanks for stopping by and have a great day.

Oh. Thanks in advance.

sunshiine (author)  akshat210451 year ago

You welcome.

This molds and gets pretty gross after a while. :P
and when it grows mold it STINKS!!!
sunshiine (author)  electricitis1 year ago

Thanks for commenting but I have had mine for over a year and it has not molded. Weather may be a factor as I live in a dry climate.

thanks alot ghys i really liked it this is for my scince project
(removed by author or community request)
sunshiine (author)  DELETED_JesusGeek1 year ago
Thanks for sharing! This was a fun project! Have a splendorous day!
with this, are you able to finely sand the pieces if you want to?
sunshiine (author)  them8triark1 year ago
I have not tried that but I would think you could. What is difficult is molding the pieces because it does not stick together like clay. I only made these one time. Maybe adding something that would stick to the milk better so you could mold it more smoothly? It doesn't hurt to try different methods. I hope this helps! I enjoyed making these! Thanks for asking and do have a splendorous day!
FrozenIce2 years ago
Woohoo for the cross!
sunshiine (author)  FrozenIce2 years ago
Thanks for stopping by and commenting! Have a splendorous day!
Thanks! By the way, your name reminded me of a song:
Thousand Foot Krutch- Sunshyne
sunshiine (author)  FrozenIce2 years ago
Checked out the song! Thanks so much for sharing!
Can yuo tuoch the plastic to molde it?
sunshiine (author)  Moco cochino2 years ago
Maybe if you allow it to dry a while because this is not as firm as clay. I hope this helps and thanks for commenting!
ChrysN2 years ago
Hi, Sunshine, Congrats on being a runner up winner! I was wondering if you can use expired milk? I have some in the fridge right now that ruined my morning coffee, but I thought that since there is quite a bit left to make some plastic from it.
sunshiine (author)  ChrysN2 years ago
I forgot, I think the best way to do this is just follow the instructions. I was thinking your milk was clumpy already but no, just follow these instructions and it should be fine. Sunshiine
Thanks, I will give it a try and let you know how it turns out!
sunshiine (author)  ChrysN2 years ago
It worked fine. Once I started heating the milk it already began to separate. I still added the vinegar though. I was worried that it might be stinky but it didn't smell very much and once it dried, it didn't smell at all.
sunshiine (author)  ChrysN2 years ago
Hi CHRYsN! I am pretty sure that will work. Just follow the directions except omit the vinegar. Please let me know how it turned out if you make it and I will add that information to my instructable. I just don't see why it wouldn't work. Have a great day and thanks for stopping by! Sunshiine
babelsgp3 years ago
Congrats! I noticed that you also wanted to paint what you create, I wonder if the paint made from milk would adhere to itself?
sunshiine (author)  babelsgp2 years ago
Might be worth a try! Thanks for sharing!
Possibly before the plastic dried?
In reading through many of the comments, I didn't see anything regarding the smell. I am thinking about doing this for a scientific art project for kids, but want to avoid a room full of drying expiring milk stench. How stinky is it when it dries?
sunshiine (author)  kristinsilver2 years ago
I apologize for not answering this question sooner but my PC died. I would think it might be offensive if you had 30 of them but thought of a possible solution. Perhaps drying them in sand covered in a box with air holes at the top might work. A simple experiment might be worth it. Thanks for commenting and have a nice day!
techturtle22 years ago
Can you speed up the drying process by heating/cooling the plastic?
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