UV protective textiles
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.
Coldblack claims to reduce the absorption of heat rays, particularly in darker colours and guarantees a minimum UPF of 30 when applied to any textile in any colour without affecting the look or feel of the product. The UPF value can vary depending on the structure and thickness of the material with tight structures recommended. Normally black textiles without Coldblack absorb up to 90% of the heat rays, and heat up accordingly, while textiles with Coldblack claimed to reflect up to 80% of the heat rays and therefore stay noticeably cooler.