Coldblack technology developed by Schoeller Textiles, is said to reduce the heating up of textiles exposed to sunlight and offer protection against UV rays, through a combination of absorption and reflection (www.coldblack. ch). Schoeller acknowledges that light coloured textiles reflect both visible and invisible rays of sunlight with both light and heat radiated back. In contrast, dark fabrics absorb both types of radiation and therefore absorb heat. REad more..