10-04-2018, 09:12 AM
Lacquered Glass or back-painted glass or back-lacquered glass
color coating on glass can be done in following ways :
1. Curtain Coating – the glass runs underneath a curtain of paint. Curtain coating is a process in which the object or substrate to be coated is guided through a curtain of fluid located in a gap between two conveyors. The mechanism is formed by a tank of fluid from which a thin screen falls down in between the two conveyors.
As the paint flows across the surface of the glass it finds its own level with the excess paint material pouring off the sides of the piece of glass being coated. The process is a high production system that is not considered a high quality finish for interiors. A typical characteristic of this process will be a series of rippled lines on the back of the coating caused by the paint not completely leveling off before the glass hits the drying oven allowing the paint to dry unevenly. This application is generally used for Spandrel glass.
2. Roller Coating – The process of running the glass through an application roller. The roller is coated with paint and the paint is applied to the glass in a continuous process. The quality is generally pretty smooth, but the process can create air bubbles in the paint as it is applied. If these air bubbles exist they can then pop when the paint is baked leaving what is referred to as pinholes in the color coating. These result in tiny clear spots created by the air particle trapped in the bubble prior to popping during drying.
3. Screen Printing - The use of a screen and a squeegee is also considered a traditional process of decorating glass with color, although for solid colored glass this process is slow and expensive. Screen-printing is generally reserved for the application of ceramic inks in decorative patterns; also know as ceramic frit, for exteriors installations where the durability of the color is critical.
4. Spray Coating – Using traditional equipment for color application such as robotic spray guns are the generally accepted process for the highest quality of color application. These spray guns are the same type used for automotive painting or commercial house painting. The primary difference when painting with robotic spray guns is the ability to control the amount of paint applied as the guns passes over the glass. Most applicators that use this process will actually spray multiple coats over the glass creating an even and consistent coating without the concern for air bubbles that can create clear pinholes. These spray systems can be done by hand or used in conjunction with automated conveyors, but total control of paint thickness can only be achieved with consistency using robotically controlled paint lines.
color coating on glass can be done in following ways :
1. Curtain Coating – the glass runs underneath a curtain of paint. Curtain coating is a process in which the object or substrate to be coated is guided through a curtain of fluid located in a gap between two conveyors. The mechanism is formed by a tank of fluid from which a thin screen falls down in between the two conveyors.
As the paint flows across the surface of the glass it finds its own level with the excess paint material pouring off the sides of the piece of glass being coated. The process is a high production system that is not considered a high quality finish for interiors. A typical characteristic of this process will be a series of rippled lines on the back of the coating caused by the paint not completely leveling off before the glass hits the drying oven allowing the paint to dry unevenly. This application is generally used for Spandrel glass.
2. Roller Coating – The process of running the glass through an application roller. The roller is coated with paint and the paint is applied to the glass in a continuous process. The quality is generally pretty smooth, but the process can create air bubbles in the paint as it is applied. If these air bubbles exist they can then pop when the paint is baked leaving what is referred to as pinholes in the color coating. These result in tiny clear spots created by the air particle trapped in the bubble prior to popping during drying.
3. Screen Printing - The use of a screen and a squeegee is also considered a traditional process of decorating glass with color, although for solid colored glass this process is slow and expensive. Screen-printing is generally reserved for the application of ceramic inks in decorative patterns; also know as ceramic frit, for exteriors installations where the durability of the color is critical.
4. Spray Coating – Using traditional equipment for color application such as robotic spray guns are the generally accepted process for the highest quality of color application. These spray guns are the same type used for automotive painting or commercial house painting. The primary difference when painting with robotic spray guns is the ability to control the amount of paint applied as the guns passes over the glass. Most applicators that use this process will actually spray multiple coats over the glass creating an even and consistent coating without the concern for air bubbles that can create clear pinholes. These spray systems can be done by hand or used in conjunction with automated conveyors, but total control of paint thickness can only be achieved with consistency using robotically controlled paint lines.