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What can forehearth coloring do for you?

Color Possibilities
Most colors that can be produced in a glass tank can also be produced by forehearth coloring. Cobalt, chrome, copper, nickel, manganese, selenium and certain other rare-earth elements are used to produce a wide range of blues, greens, browns, purples, pinks and blacks. By using various combinations and concentrations of these elements, it is possible to obtain a large palette of colors.

Most often, forehearth coloring is done with oxidized soda lime glasses. However, special compositions such as reduced soda lime, amber, borosilicate and lead glasses can also be colored using forehearth technology. Forehearth coloring has been used to modify glass colored in the tank, allowing the conversion of dead leaf green to antique green for wine bottles.

We are able to match special colors and supply special concentrate formulations to suit custom applications.

Increased Flexibility
Developed through years of extensive testing, the forehearth coloring system permits glass manufacturers to change colors in response to customer demand without incurring the higher costs associated with producing short runs of special colors in the tank.

This production flexibility reduces costs and increases customer satisfaction while eliminating the need for involved production scheduling.

Increased Productivity
With forehearth coloring, there is no need to incur high losses in machine time while converting a large tank from flint to colored glass production. With machine downtime minimized, higher production levels and increased efficiency can be achieved at lower costs.

Reduced Inventory Costs
Forehearth coloring can significantly reduce the high cost of inventorying large quantities of colored glass produced only at certain times during the year. Since smaller lots of colored glassware can be produced as needed, there is no need to produce and warehouse large quantities of colored glass to meet future customer demand.

Lower Shipping Costs
To achieve higher efficiencies, glass companies often choose to produce all colored glass at one plant. But the costs of shipping the colored glassware between plants or to distant customers can become very significant. With a forehearth coloring system at each location, high transportation costs can be reduced or avoided.

Lower Energy Consumption
The cost and availability of natural gas, electricity and other fuels is tremendously important. Some manufacturers use small tanks to produce colored glass. But since energy costs for smaller tanks can be up to double the same costs for a large tank, glass producers are paying a premium for energy on colored production from smaller tanks. The cost factor is significant. That’s why large glass tanks, with lower energy requirements per ton, can benefit the most from forehearth coloring.

Knowledge Base Information: 
Glass Coloration Made Easy - Adding Value to Glass