Weather effect on paint can easily be noticed mostly on the exterior part of the painted object. Basically, we have exterior and interior colors, in the sense that some paints with certain colors are advised to be painted either in the interior or exterior part of the object. At Setpoint Paint and Chemicals Limited we put into consideration weather effect on paints, hence we try as much as possible to give our clients the best and professional advise that will assist them in making the right decision in their paint project.
Color changing
Various technologies exist for making paints that change color. Thermochromic ink and coatings contain materials that change conformation when heat is applied or removed, and so they change color. Liquid crystals have been used in such paints, such as in the thermometer strips and tapes used in aquaria and novelty/promotional thermal cups and straws.
Photochromic materials are used to make eyeglasses and other products. Similar to thermochromic molecules, photochromic molecules change conformation when light energy is applied or removed, and so they change color as a result of weather effect on paint.
Color-changing paints can also be made by adding halochromic compounds or other organic pigments. One patent[27] cites use of these indicators for wall coating applications for light-colored paints. When the paint is wet it is pink in color but upon drying it regains its original white color. As cited in patent, this property of the paint enabled two or more coats to be applied on a wall properly and evenly. The previous coats having dried would be white whereas the new wet coat would be distinctly pink. Ashland Inc. introduced foundry refractory coatings with similar principle in 2005[28][29] for use in foundries.
Electrochromic paints change color in response to an applied electric current. Car manufacturer Nissan has been reportedly working on an electrochromic paint, based on particles of paramagnetic iron oxide. When subjected to an electromagnetic field the paramagnetic particles change spacing, modifying their color and reflective properties. The electromagnetic field would be formed using the conductive metal of the car body.[30] Electrochromic paints can be applied to plastic substrates as well, using a different coating chemistry. The technology involves using special dyes that change conformation when an electric current is applied across the film itself. This new technology has been used to achieve glare protection at the touch of a button in passenger airplane windows.
weather effect on paint Color can also change depending on viewing angle, using iridescence, for example, in ChromaFlair.
