9/8/2023 0 Comments Photo frame no glassThe most commonly used configuration is Glass + Polyvinyl butyral (PVB) Foil + Glass. Laminated glass offers shatter-resistance and protection from malicious breakage to art glazing. Low iron glass has light transmission of approximately 91.5% and reflection of 8%. Because low iron glass light absorption can be as low as 0.5%, compared to about 2% for clear glass, the light transmission will be significantly better than clear glass. Low-iron, or water white glass, is made using special iron free silica, and is generally only available in 2.0 millimetres (0.079 in) thicknesses for picture framing applications. Low-iron (or "Extra-Clear," "Water White," etc) Whereas absorption can be reduced by using low-iron glass, reflection can only be reduced by an anti-reflective surface treatment. Clear glass has light transmission of approximately 90%, absorption of approximately 2%, and reflection of approximately 8%. Glass thicknesses typically range from 2.0 to 2.5 millimetres (0.079 to 0.098 in). Types of Picture Framing Glass Regular (or "Clear") ĭue to widespread availability and low cost, Soda Lime Glass is most commonly used for picture framing glass. There are various glazing options to achieve this goal as explained in the following sections on Types of Picture Framing Glass. While type of the glass substrate will affect the light absorption of the glazing, the surface treatment can affect light scattering, light reflection and in some cases, light absorption. In art framing, light reflection causes glare, while light absorption also may cause the transmitted colors to be dulled or distorted. The total light transferred through the glazing material (light transmission) is reduced by reflection and/or absorption. Light transmission (for this article, the perceivable visible spectrum between 390 nm and 750 nm is considered) through glass is diminished either by light reflection or light absorption of the glazing material. Light transmission of glass is especially important in art framing, since light passes through the glass twice – once to illuminate the artwork, and then again, reflected from the artwork, as colors - before reaching the viewer. Visible light transmission is the primary measure of glass' invisibility, since the viewer actually sees the light, reflected from the artwork. Therefore, the least visible glazing best displays the artwork behind it. In the case if the framed object or artwork is UV resistant, UV protection can still serve the purpose of preserving the integrity and colors of non-conservation grade framing materials susceptible to UV damage, such as mat board (passe partout).Īlthough protection is a primary purpose of glazing, displaying an artwork is the primary purpose of framing it. Artworks that require protective glazing are those rendered on paper or fabrics (including photographs), which contain pigments and dyes that absorb UV and are susceptible to discoloration. Regular glass as well as some glass surface treatments can also filter some of the damaging ultra-violet radiation (UV) and heat (NIR). Laminated glass and some acrylic may be used to protect against physical damage from glass breakage and to offer protection from a malicious attack. The primary purpose of glazing in art framing is to clearly exhibit the work while physically protecting it from damaging factors such as light, humidity, heat, and soiling. Picture framing glass ("glazing," "conservation glass," "museum quality glass") usually refers to flat glass or acrylic ("plexi") used for framing artwork and for presenting art objects in a display box (also, "conservation framing"). ( June 2022) ( Learn how and when to remove this template message) Several templates and tools are available to assist in formatting, such as Reflinks ( documentation), reFill ( documentation) and Citation bot ( documentation). Please consider converting them to full citations to ensure the article remains verifiable and maintains a consistent citation style. This article uses bare URLs, which are uninformative and vulnerable to link rot.
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