Colored glass is a type of glass made by adding coloring agents or using surface treatment techniques during the glass manufacturing process，Glass products that present specific colors and possess corresponding optical and energy-saving characteristics。It not only has decorative functions，It can also effectively adjust the light、Insulation, energy saving, and UV blocking，Widely used in building doors and windows、Curtain wall and other fields。
Definition and Basic Characteristics of Colored Glass
Colored glass，Also known as colored heat absorbing glass，It is a base colored glass produced by float or ordinary flat plate process。Its main features include：
Energy saving and thermal insulation：Produced by absorbing solar radiation“Cold Chamber Effect”，Reduce indoor temperature，Save air conditioning energy consumption。
Light adjustment：Can absorb more visible light，Soften the sunlight that passes through，reduce glare，Improve indoor visual environment。
UV blocking：Can effectively absorb solar ultraviolet rays，Prevent indoor items from fading or deteriorating due to UV exposure。
Good transparency：Maintain a certain degree of transparency，Can clearly observe outdoor scenery。
Stable color：Colorful and long-lasting，Enhance the aesthetic appearance of buildings。
Its optical performance has clear indicators，For example, visible light transmittance is2-6mmThickness glass required≥25%，8-19mmThickness required≥18%。Color uniformity is achieved throughCIELABcolor difference△E﹡abcontrol，Single piece color difference≤2.5，Color difference within the same batch≤3.0。
Classification of Coloring Principles and Processes
The core principle of glass coloring is to change the material's absorption of light、Reflecting or transmitting characteristics to present colors。It can be specifically divided into light absorption type（If transition metal ions are added to selectively absorb specific wavelengths of light）Light scattering type（Like metal colloidal particles causing scattering）。
The coloring process is mainly divided into two categories：
Overall coloring method（Material coloring）：Adding colorants to raw materials during the glass melting stage，Make the glass appear color as a whole。mainly include：
Ionic coloring：Add cobalt、manganese、Transition metal oxides such as nickel，Ions absorb specific wavelengths of light through electronic transitions。
Colloidal coloring：Add gold、Silver and other metallic compounds，Formation of colloidal particles through heat treatment，Color development through light scattering。
Semiconductor coloring：Using materials such as cadmium sulfide，Its color changes with the proportion of components。
Surface coloring method：Treating the surface of formed glass to form a color layer。Common methods include：
Color glaze method：After coating with colored glaze, it is melted into a glaze layer through heat treatment。
Thin film coating：Through chemical thermal decomposition、Vacuum evaporation and other technologies form metal or oxide films on the surface（Like tin oxide blue film、Iron oxide gold film）。
Product Classification and Standards
Colored glass can be classified in various ways：
According to the production process：Colored float glass（thickness2-19mm）Colored ordinary flat glass（thickness2-5mm）。
By purpose：Architectural grade、automotive-grade、Mirror grade, etc。
By color tone：Including tea color、golden、green、blue、grey、Purple;、Multiple series including red。
The product must comply with national standardsGB/T 18915.1-2002，and pass throughISO、CEWaiting for authentication。The product logo should indicate the color and transmittance ratio（as“green-50”）。
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Main application scenarios
Colored glass is mainly used in building areas that require both natural lighting and thermal insulation for energy conservation，It combines functionality and decoration：
Building doors, windows, and curtain walls：Reasonably utilize sunlight，Adjust indoor temperature，Simultaneously beautifying the exterior of the building。
Special functional scenarios：Different colors correspond to specific functions，Dark gray glass can be used to reduce glare（Like sunglasses），Tea colored glass can be used to filter blue light（Like goggles）。
History and Decorative Applications：Colored glass has a long history，Colorful windows commonly used in churches and other buildings in the early days，Create unique art and lighting effects。
In summary，Colored glass is a multifunctional glass material made through specific coloring processes，Playing an energy-saving role in modern architecture and special applications、The important role of protection and decoration。