Emissivity

This area of insulation is quite complex. It can become difficult to follow at times, especially when covering topics like transmissivtty and reflectivity, along with emissivity and absorbency. These subjects sound more complicated than they actually are, but, with the correct information, you'll be able to fully understand this area of technology and evaluate the information that's posted on this and other websites. For instance, The laws of physics state that nothing can travel through a vacuum? Infrared is part of the electromagnetic spectrum, as is visible light and ultra-violet light and they are generated by the Sun. These waveforms then travel all the way from the Sun to us via the vacuum of space. The same site, in their FAQ section, states that reflective technologies work if covered with additional paint and even wallpaper. This is just not true, reflective technologies MUST be on the surface. They are a surface factor and any heat radiation that is not reflected by the actual SURFACE will be absorbed and transmitted through to the other side. There is plenty of chatter on the net in forums like this about reflective coatings, some good, some bad. But, reading through messages, it becomes apparent not that many people actually understand this area of reflective insulation. One of the main reasons for this I feel is the lack of genuine and credible information supplied by some website. If you have a question, be it a general enquiry regarding reflective/insulating paints, or a more specific question on the subject, please ask away. Signed off: Emissivity