Reflectance function aluminium

Complex mean reflectance functions for aluminium, nickel, and copper are presented in Fig. 11.10. These represent a series of increasingly anisotropic... 

Key components of SSG are glass (clear, tinted, reflective, laminated, insulating), framing (anodised aluminium, coated aluminium, stainless steel) and, of course, silicone sealant as the preferred choice. The function of the sealant in the SSG system is to provide structural durability and waterproofing. 

In the surface mirror, modern technology has enabled an improved method of construction the reflecting metal film is coated under high vacuum on the side on which radiation is incident. Various metals are applied for the different types of surface mirrors. Their reflectance is shown in Fig.26 of Chapter 8. The most frequently used metal for surface mirrors is aluminium. Its reflectance as a function of wavelength and its dependence on preparation conditions is shown in Fig.l 1. 

Figure 7. Kubelka-Munk transformed diffuse reflectance spectrum of (A) untreated and (B) calcined catalyst 10-wt% Au on aluminium oxide "C" calcination conditions 400°C, air, 4 h. The change in the plasmon absorbance of the supported gold colloid due to change in particle size can be clearly seen c.f. Figure 2 curves B and C. (the Kubelka-Mumk function F(R) is not the simple absorbance spectrum but is divided by the scattering spectrum of the white alumina support, which is normally assumed to be monotonic F(R) = K/S)...

Acrylic lacquers are used both as basecoats and topcoats in vacuum metallising applications on a number of plastic substrates, including polyester, nylon, acrylic, polyethylene, polystyrene and PVC. The function of the basecoat is to provide a good key between the substrate and the vaporised aluminium metal and to fill the imperfections in the substrate, thus enhancing the brightness and reflectivity of the deposited metal. The basecoat must also have extremely low volatility, since volatile by-products released under vacuum would lead to a poor quality deposition. The fast lacquer drying properties of acrylics and the non volatile inert nature of the polymer film make them an ideal choice for this application. 

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