- #1
fog37
- 1,568
- 108
Hello Forum,
Thermochromic materials , either LC or leuco dyes, change color with a change in temperature. They are commonly available and not expensive. Photochromic materials, instead, change color when illuminated by UV light (clear to color or viceversa?).
Considering that light (visible or UV radiation) and heat (infrared radiation) are two different forms of electromagnetic energy, I feel that photochromic and thermochromic materials are somewhat similar in the sense that they are both reversible (if the room temperature heat is available) and their color change is activated in both case by absorbing EM radiation (only in a different spectral region). Both materials change structure when they absorb either UV or infrared and their reflectance properties change producing a different color...
Is that correct?
Does anybody know if piezochromic materials (additives), which change color under pressure, are also available and not too expensive?thanks.
fog37
Thermochromic materials , either LC or leuco dyes, change color with a change in temperature. They are commonly available and not expensive. Photochromic materials, instead, change color when illuminated by UV light (clear to color or viceversa?).
Considering that light (visible or UV radiation) and heat (infrared radiation) are two different forms of electromagnetic energy, I feel that photochromic and thermochromic materials are somewhat similar in the sense that they are both reversible (if the room temperature heat is available) and their color change is activated in both case by absorbing EM radiation (only in a different spectral region). Both materials change structure when they absorb either UV or infrared and their reflectance properties change producing a different color...
Is that correct?
Does anybody know if piezochromic materials (additives), which change color under pressure, are also available and not too expensive?thanks.
fog37