Aluminum foil can be place on the grow room's walls and laid under the room's plants to reflect light. When light irradiation the single finish surface from horizontal, the smooth surface reflectivity is higher than the dark surface. The aluminum foil uses of light reflection ability is especially strong, its light reflectivity is affected by the purity, smoothness, surface roughness, heat rays wavelength and other factors. It would be used as a reflector/concentrator from a UV bulb. If there are impurities, impurity scattering happens and increase radiation absorption. For smooth aluminum foil, the reflectivity of lateral will be 10% higher than the longitudinal. Required fields are marked *. In visible wavelength range of 0.38-0.765 m, the reflectivity is about 70% – 80% , in infrared wavelength scope of 0.76 to 505 m, the reflectivity can reach 75%- 100%! TABLE 1 MATERIAL REFLECTIVITY e-PTFE 95% Aluminum—sputtered on glass 80% Aluminum foil 73% Stainless steel (various formulas) 20 – 28%. With the increase of the purity and heat rays wavelength of the aluminum foil, the light reflectance increases, … I need it to be cheap and easy to form a reflector out of it. Aluminum foil has good reflective performance, so aluminum foil uses as light refection. When the aluminum foil surface is rough, the reflectivity is affected by irradiation light wavelength greatly, the overall trend is reflectivity improve with increasing wavelength, reflectivity is highest when the light wavelength is 6505 m. But, to single finish surface aluminum foil, the dark surface’s light reflectance decline with the increase of the wavelength. To obtain high reflectivity of aluminum foil, the purity should be not less than 99.6%. The aluminum foil uses of light reflection ability is especially strong, its light reflectivity is affected by the purity, smoothness, surface roughness, heat rays wavelength and other factors. The folks who professionally make mirrors out of aluminum can get you R>90% at 400 nm, and R>80% for most of the visible. Our UV-enhanced coating offers >90% reflectance from 250 to 450 nm. It is interesting to note that when the irradiation light tilt 10″ from vertical irradiation, the dark surface reflectivity is higher than smooth surface. Aluminium is rarely used as an uncoated reflective surface, the mechanical and environmental properties are poor. Your email address will not be published. Due to aluminum foil roll surface finish level is different, the light reflectivity is also different too. The aluminum foil uses of light reflection. Your email address will not be published. Aluminium does have a dip in its reflectivity in the 700nm – 900nm spectrum. Table 1 shows the UV reflectivity of standard materials used in disinfection reactors. A common material used in commercial UV disinfection systems is … All in all, bright and matte sides of a household aluminum foil have the same total reflectivity spectra. A protective layer of MgF2 or SiO2 is needed. With the increase of the purity and heat rays wavelength of the aluminum foil, the light reflectance increases, with the decrease of the flatness and surface roughness, the light reflectivity of aluminum foil decrease. Hang aluminum foil with its shiny side outward instead of against the wall. For smooth aluminum foil, the reflectivity of lateral will be 10% higher than the longitudinal. The purity of aluminum materials have obvious effects on the reflectivity of the aluminum foil. The material composition of alu foil for air condi... 1103 No.14 Shangwu Outer Ring Rd, New District, Zhengzhou, China. HAOMEI Aluminum Co., Inc. was established in 1990 to serve the printing industry with foil laminations and the food service industry with foil wrapping materials.Alufoil has continued in these industries and expanded to include gift wrap, candy wrap, hair foil, craft foil, foil for pharmaceuticals and light gauge aluminum for industrial uses.Our mission is to provide the best quality materials at competitive prices and to deliver these materials promptly. Thanks Because bare aluminum is extremely delicate and susceptible to damage, a protective overcoat is layered over the aluminum to prolong the life of the mirror. This can slightly reduce the above values, or restrict the coating to UV / Visible use. The more light and clean the surface of aluminum foil is, the stronger the reflective performance is! A first plateau in the visible spectrum (around 86% for the bright side, and 88% for the matte one), then a downhill around 900 nm bouncing back to values higher than 95%, followed by a somewhat upward linear trend after 1200 nm. Please see the Graphs tab for reflectance curves. If you wanted 99% reflectivity, you'd need a broadband dielectric, but from the sound of it aluminum foil would do the job for you. I'm looking for a material that is highly reflective for UVC (240nm to 265nm band). Or if anyone knows of a coating process that can be used on a formed piece of aluminum that would be good for reflecting UV.

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