Double Coat Colors

As the name implies, double coated tubes have been coated twice to yield their unique and vibrant colors. The tubes are first coated with a pigment and then coated a second time with a fluorescent material. This process traps the pigment between the inside wall of the tube and the fluorescent coat. The pigment acts as a filter through which the light emitted from the fluorescing second coat flows.

Double coat tubes perform best in gentle curves and straight sections. Due to the relatively fragile nature of the pigment coating, double coat tubes are not recommended for use in tight bends. The pigment coating may thin significantly in tight bends, causing color shift in those areas. In general, a cooler bend and minimal stretching of the glass is preferred.

Double coat tubes have been designed for use with argon/mercury fill gas. The color of some double coat tubes may vary slightly when neon fill gas is used. Please call for a sample piece to determine whether a certain double coated tube will work well in your application.

Double coat tubes in 8mm and 9mm are available on a special order basis only, 100 pound minimum.