colour technology Keeping colour cooler Ever thought a house or building would look great painted in a sleek, dark colour – then had to shelve plans for fear of the heat damaging the substrate or the building getting unbearably hot in summer? Resene CoolColour technology makes painting exterior surfaces in dark colours both easier and safer. It can be used on all sorts of exterior materials and applications, from weatherboards and concrete to windowsills. A Resene CoolColour looks like a normal colour but thanks to special pigment technology it reflects more heat, so it doesn’t get as a hot as a standard colour would. When looking at the role paint can play in temperature control in buildings it comes down to colour. The ability of white to reflect visible light extends through the infra- red and, because of this, white surfaces remain relatively cool to touch, even in direct sunlight. The opposite is true of black and dark colours, which absorb light in this infra-red area, resulting in significant heat build-up in the surface. As the emissivity of paints is not particularly good, the surface heat is conducted into the substrate and then radiated into the building. Resene Half Kumutoto Right: Fence in Resene CoolColour All Black, concrete tiles in Resene Bleached Grey concrete stain, pallet table in Resene Dauntless with planter on top in Resene Chenin. Other pots in Resene Dauntless, Resene Java and Resene Dali. 68 |