Photosensitive paint
Paint that changes color with light
They are unique and experimental products that Cromas has decided to commercilize because of their big demand. The first photosensitive pigments have been used industrially in the lenses for sunglasses in order to reduce the intensity of light from the sun.
In the sector of the paints these are used for decorations of great effect but especially temporary, since the pigments have not high resistance to direct sunlight, just where you get the greater change. A change can be forced for indoors with good light or other UV source.
Moving from internal to external, the color change of the photosensitive paint is total over 1-3 seconds, depending on how much light is present, and it reverses completely within 5-15 seconds.
Of great effect for exhibits, exhibition stands, furniture and objects where for example appear writings or logos first invisible in light and then magically in the foreground.
The colors, if seen indoors under neon light, appear essentially colorless, with a strong change that may be affected by a colored background or not. The biggest change is achieved, however, with a white background.
The colors available are:

Colorless → Red
Colorless →Blue
Colorless → Yellow
For information on available colors in stock we suggest to contact us

For uses in textile and leather industry we can also provide pigment concentrate pastes based solvent or pigment with dispersant in solid phase to be used for applications in water-based by spray or roller.
These products are suitable for indoor use only due to they show a short duration in time when are outdoors, and also because they can not be protected with anti-UV transparent because they lose the ability to change of color.
In order to permit evaluation of the effect, and for small surfaces, a test kit of the product is available. For information please do not hesitate to contact us.
The effect can be layed by the use of a primer on:
- wood
- metal (iron, aluminium, brass etc ...)
- plastics (ABS, ABS-PC, etc ...)
- glass
- version applicable for interior walls

For more information on the phenomenon of photochromism we recommend visiting the following links:
Photochromism
pac.iupac.org
Spiropyran