annealing lehr

An annealing lehr is a specialized furnace used in the manufacturing of glass, ceramics, and metals to carefully control cooling. After these materials are shaped or fired, they are heated to a high temperature and then slowly cooled in the lehr to relieve internal stresses and improve durability. This controlled cooling process ensures that the final product has uniform strength, stability, and clarity, reducing the chances of cracking or breaking when used. Essentially, an annealing lehr helps produce high-quality, reliable materials by carefully managing the cooling phase after the initial shaping or firing.