The Farbglashütte Reichenbach GmbH (who has 130 years experience in the production of colored overlay glasses) produces colored overlay glasses in a large variety and brilliance. To produce these glasses in a constant high quality, the quality control is the most important factor of our work.

The preparation of the batch begins with the weigh in of the high quality raw materials by means of the most modern weighing technology. After an exactly defined mixing process the homogeneous batch reaches the melting furnace. The melting process is permanently controlled and optimized by the furnace control.

Samples are tested for bubbles and cords and compared to a standard color sample. In addition the expansion is checked by thread test every day. Daily samples of each pot is fused with a reference glass, annealed and the following tested for stress with the polarimeter. These quality controls are practiced for more than two decades in our factory and not until the results of the tests are positive, the glasses are released to the further processes. The COE of our glasses is also measured with the dilatometer in regular intervals and the results are archived.

The further production processes are optimized so that only products of the highest quality are delivered to our customers. Modern annealing lehrs enable an exact cooling of our overlay rods. Our crushing and sieving techniques are able to separate metal particle with our newest construction that is equipped with several magnet separators (each magnet is 10000 gauss strong).

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