Description: We've all seen toys and things that change color when you run them under warm water or heat them up in the sun. Some of us were especially mesmerized and had to find out what made them do that. It turns out that this is a property called 'thermochromism' and it can be implemented in a number of ways. This particular thermochromic pigment is a Leuco dye type pigment which is made up of a mixture of Leuco dyes, weak acids and salts microencapsulated in polymer.This is a very fine, colored powder that changes to a clear powder when you heat it to about 92°F (33°C). This is really cool for a lot of reasons. You can mix this pigment with paint to create thermochromatic paint for craft projects or to make temperature indicators. It mixes with Slime and Polymorph as well, rendering them both thermochromatic. Use a controllable electric heating source and you could even build a thermochromatic display!This pigment comes in a 20g bag, which is more than enough to play with and just enough for a good sized project (depending on what you're doing with it). Careful not to overheat the pigment as temperatures over 200°C can cause irreversible damage to most Leuco dyes.Features:Teal at Room TemperatureTurns Clear at Around 92°F (33°C)Mix with paint, glue, resin, Polymorph, Slime, etc.
K**M
Purple to pink slime
We bought this product to make colored slime when teaching polymer chemistry to freshmen. It is very cool. I wouldn't say it goes from purple to red, but it is purple in the cool phase, and hot pink in the warm phase. Only a tiny amount of pigment is needed so a little goes a long way. We have each student make their own so we have them add just a pinch to their PVA solution and stir well before mixing in the sodium borate solution. Works well. I think the reason the manufacturer does not include instructions is because every recipe is probably different but when working with pigments, less tends to be more. Would buy again.
R**Y
Awesome in slime!
I bought the purple to "red" (more like pink) to make slime with my daughter. It works great! She has a nice ball that changes color when it warms up. Here are some slime hints:1. Use clear glue, not white glue2. She used the glue/sta-flo recipe3. We guessed and added 1/8tsp per "serving". This gave us a brilliant purple and vibrant pink. A little goes a long way with this stuff.4. This pigment turns color around 92F, which is below but close to your body temp. Warm bath water or pool water is like 85F, so a little warmer than that. You may need to hold it between your hands for a couple minutes. It does change color and the kids love it. You don't need to hear it in the microwave or steam or boiling water, those will probably destroy the pigment per manufacturer. A small ball in a closed hand is sufficient.
J**K
I really like this pigment but buyers should note it turns from ...
I really like this pigment but buyers should note it turns from Purple to PINK not red as listed in the description. It is an ultra fine/light powdered pigment so the 20 grams is a niced sized amount for completing at least a project or a few if they are smaller items, My only wish is that it came in some type of hard sided container you could scoop out from vs the sealable plastic bag. I find that I end up making quite a mess getting this out for use or even trying to transfer to a more suitable container for storage/future use.
M**H
Not as cool as we had hoped
Does it work? Yes.Used in slime. It does not react to your touch. It will only change when blasted with a blow dryer, ran under hot water, or sat in direct sun.So it is not as cool as we were hoping since playing with it, it just stays one color in your hands.
S**G
Highly recommended for homemade play dough recipes!
I love the UV sensitive pigment for homemade slime but this is the bomb when it comes to play dough additives. It would describe the color more purple to pink when adding to a flour dough, but regardless my kiddos were really taken with this.
J**N
Not worth it...
I ordered this to make thermochromatic putty with my class. It worked only if you put it in the microwave and got it so hot I wouldn't let the children handle it. I thought it would work with body heat. For the cost, this was a HUGE disappointment. It may work great for other prjoects, but is worthless for elementary school children.
P**Z
Good for crafts
Used this for a color changing goo at work. The kids really liked it.Just need about a teaspoon of this, 1/3 cup of clear glue and about 2 tablespoons of laundry starch.
T**I
She absolutely loved it the only thing I wish is that was ...
I bought this to put into slime for my daughter. She absolutely loved it the only thing I wish is that was just a little bit more sensitive. It has to be kind of an extreme cold or a decent warm in order for it to change colors. Besides that it was super fun there were no funny reactions to it on our skin and it makes for awesome slime. Thank you.
Y**E
One Star
VERY SMALL NOT WORTH THE MONEY
L**Y
Colour did not change
Tried using it for slime, but the colour did not change at all. Waste of money
S**A
Couldn't get it to change from blue to white. ...
Couldn't get it to change from blue to white. I don't know if we were missing something... this did not meet expectations
Trustpilot
3 days ago
1 month ago