How to Make Thermochromic Ink

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Are you tired of the same old boring colors on all your t-shirts? Do you think glow-in-the dark ink has just lost it shine? Well if you answered yes to either of these, or in my case both, thermochromic ink is the thing for you. Thermochromic ink is paint that changes color when it is heated. You can create a range of color changes like green to blue or brown to purple. You'll have the entire spectrum in the palm of your hand! And the best part is, you can use it on a variety of things including clothing, walls, even finger nail polish!

Step 1: Materials List

Acrylic Paint
Acrylic Medium
Thermochromic Pigment
Stirring Stick
Paint Storing Jars or disposable cups
Applicator 
Plastic Spoons
Some material to test on (cut-up cloth)
Hairdryer

Step 2: Step 1

In the mixing container, add 1 teaspoon of acrylic medium.

Step 3: Step 2

Add 5 teaspoons of acrylic paint to the medium. Mix until smooth.

Step 4: Step 3

To the mixture, add desired amount thermochomic pigment, mixing in 1 teaspoon at a time.

Step 5: Step 4

Once everything is combined, spread a small, even layer of the paint on a piece of scrap material. Allow it to dry for about two hours.

Step 6: Step 5

Once the paint has dried, take the hairdryer and hold it over the painted area until it the color changes. If it doesn't, add more thermochromic pigment to the left-over paint and repeat steps 4-6.

Step 7: Step 6

After all the changes have been made, paint the ink on a t-shirt in any design and enjoy!

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    18 Discussions

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    RahulUkey1

    8 months ago

    What type of acrylic medium we need to use ?

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    10010048fowl1381

    Reply 2 years ago

    Because I used a darker acrylic paint (blue), I used 3 teaspoons. But if you use a lighter paint, like pink for example, 1-2 teaspoons should be enough

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    fowl1381

    2 years ago

    can you help me with this

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    fowl1381

    2 years ago

    how much pigment do you use in it ?

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    fowl1381

    2 years ago

    how much pigment do you use in it ?

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    OliverD20

    2 years ago

    I found the pigment on SFXC. www.sfxc.co.uk

    I did buy some from eBay but it wasn't as good.

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    ampfni.france10010048

    Reply 3 years ago on Introduction

    I think that you meant a 20gram jar, i.e. 0.7 oz jar because, 28 gramsx 20 is abotu 600 dollars from a china supplier, and 20 grams is abotu 20 30 dollars on ebay etc

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    ragavs

    4 years ago on Introduction

    what types of easily avilable Thermochromic pigment which is used above 28 deegre cel.

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    smckillip

    4 years ago

    how would you dye the whole shirt like the first picture?

    1 reply
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    10010048smckillip

    Reply 4 years ago on Introduction

    The first picture is made with thermochromic thread. I didn't make it sorry. You could try thinning out the paint and medium mixture with a paint thinner, and then dip the entire shirt in it.

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    24Eng

    4 years ago

    In step 3 could you give an example of how much pigment you used?

    1 reply
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    1001004824Eng

    Reply 4 years ago on Introduction

    I used 3 teaspoons of pigment, but it works better if you use a lighter color than the turquoise I used, like orange or pink.

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    KemikalzAreFun

    4 years ago

    Think it would work if you put it in some clothing dye, then dyed your clothes??

    1 reply