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Colors that never fade

slo1
Posts: 4,353
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9/11/2012 3:08:52 PM
Posted: 4 years ago
Nature still remains a fantastic way to learn new things from. We are now learning and perfecting how to create color by creating structure that alters light rather than just adding a pigment. Pigments fade over time versus a structure based color will continue to reflect the wavelength it is designed to reflect until the structure is physically destroyed or disrupted.

It will be interesting to see how this new understanding gets used in the future.

http://www.newsdaily.com...
Ore_Ele
Posts: 25,980
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9/12/2012 12:07:11 AM
Posted: 4 years ago
At 9/11/2012 3:08:52 PM, slo1 wrote:
Nature still remains a fantastic way to learn new things from. We are now learning and perfecting how to create color by creating structure that alters light rather than just adding a pigment. Pigments fade over time versus a structure based color will continue to reflect the wavelength it is designed to reflect until the structure is physically destroyed or disrupted.

It will be interesting to see how this new understanding gets used in the future.

http://www.newsdaily.com...

How is that really different from pigments? They fade from the structure (on an atomic level) being physically altered.

Does it just last longer?
"Wanting Red Rhino Pill to have gender"
slo1
Posts: 4,353
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9/12/2012 10:46:56 AM
Posted: 4 years ago
At 9/12/2012 12:07:11 AM, Ore_Ele wrote:
At 9/11/2012 3:08:52 PM, slo1 wrote:
Nature still remains a fantastic way to learn new things from. We are now learning and perfecting how to create color by creating structure that alters light rather than just adding a pigment. Pigments fade over time versus a structure based color will continue to reflect the wavelength it is designed to reflect until the structure is physically destroyed or disrupted.

It will be interesting to see how this new understanding gets used in the future.

http://www.newsdaily.com...

How is that really different from pigments? They fade from the structure (on an atomic level) being physically altered.

Does it just last longer?

Pigmentation uses subtractive methods to create color. The actual pigment molecule absorbs some light waves and reflects others. Of course when light is absorbed it is impacting the pigment itself and causes it to fade over time.

Structural color involves the use of layering materials so that when the light is reflected it causes various interference patterns. If a certain wave length line up with each other it amplifies that wavelength's color. Other wavelengths get reflected but due to the structure get reflected back so it cancels itself out, so you don't see that color.

Since it is based upon structure and the initial light is all reflected and not absorbed that structure will not break down like a pigment will when it absorbs some of the light.

Here is good article that explains it a little better. It is in the context of butterflies that use both pigment and structural colors. It is amazing how the color just pops on them.

http://animals.howstuffworks.com...
RoyLatham
Posts: 4,488
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9/14/2012 9:18:36 AM
Posted: 4 years ago
The blue color in blue jays is a structural color. The colors of hummingbirds are structural. The color depend on a directional light source like the sun on a clear day. They disappear on overcast days.

Colors of pigments fade when the chemical structure of the pigment breaks down. Mineral pigments are the most stable. Photographers who want color photos that last seek ink-jet printer cartridges made from mineral pigments.

There are also some obscure old printing processes that are very stable. I have a few dye-transfer prints from 40 years ago that look as bright as the day they were printed. The dye transfer process is labor intensive and is now too expensive to be practical.
Thaumaturgy
Posts: 166
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9/26/2012 8:02:35 PM
Posted: 4 years ago
At 9/14/2012 9:18:36 AM, RoyLatham wrote:
Photographers who want color photos that last seek ink-jet printer cartridges made from mineral pigments.

What kind of mineral pigments are used in inkjet printing?