SparkFun Electronics Comments

bboyho on COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)

2017-04-10T16:11:52-06:00

——————– Tech Support Tips/Troubleshooting/Common Issues ——————–

Look here for more tips on using thermochromatic pigment => [ https://www.sparkfun.com/products/11555#comment-58ec012ef3b1a81f3a8b4567 ].

Customer #538949 on COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)

2014-04-23T15:04:16-06:00

Is it safe to use on some jewelry? Is it toxic?

Customer #328669 on COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)

2013-02-27T14:10:45-07:00

Is there a pigment to paint ratio roughly?

Customer #141789 on COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)

2012-11-21T18:13:43-07:00

use of thermochromic pigments in a brazilian project: http://www.youtube.com/watch?v=7eAfuHPX6nw

climber59 on COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)

2012-11-18T16:46:24-07:00

Would it be possible to use this to tie-dye a bed sheet?

Vvmsbarbosa on COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)

2012-11-14T03:33:01-07:00

Be careful with sunlight. It is not suitable to outdoor usage but only indoor as it doesn’t have UV protection. The organic components that are utilized in the pigments gets old with UVs. Do not expose above 75ºC for long periods. Expose until 200ºC only for time peaks. Although it has some cares to be taken, the potential applications have a huge range.

Dia on COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)

2012-11-13T17:05:48-07:00

Kamiquasi is right! You can use these pigments to make something that changes color by combining with other pigments, mixing with a transparent binder and painting over another color, or blending with a material that is already another color (like sugru). It can take a lot of pigment to really achieve a color change in another product, but I’ve had really good luck rolling, pressing, or dusting pigment onto sticky surfaces rather than trying to mix through. This has worked fairly well with polymorph, sugru, and acrylic paint, and really reduced the amount of pigment needed for a dramatic color change.

Kamiquasi on COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)

2012-11-08T14:31:30-07:00

If you were to paint your car - don’t expect it to last. They’re not UV-stable. You’ll want to at least add a UV-filter coat but that will only lengthen its life, not make it permanent :)

There are a few that change between 2 colors but they are based on much the same principle - 1 dye as a base color and the other dye actually going between a color and relative transparency.

One neat thing though is that you can actually have a bit of control over the temperature at which these changes happen. So if you have multiple colors at different temperatures, you can get a nice change between several colors.

Unfortunately, there aren’t many places to source these properly. Chemistry shops can sometimes deliver, but can also be quite expensive. One source for a Leuco dye-based solution that has a visual impact similar to liquid crystal thermochromics (think of ‘paper’ thermometers) is StardustColors in France. Look for “PULSAR” for the multicolor solution (they also offer basic colors).

SlyVixsky on COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)

2012-11-08T14:03:55-07:00

so if i repaint my car, i’ll know when the seat is goinna burn getting in :D very cool product, though my other thought is back to the 2007 hot wheels color changing cars. did they work on the same principle? too warm, they go clear to reveal the color underneath? or is there a version that also changes from one color to another?