Silvered flat glass mirror products can be fabricated to provide additional aesthetic appeal such as beveled edges and surface accents. As additional fabrication features are applied, is it critical to ensure proper fabrication conditions and techniques are utilized during every step of fabrication in order to protect and maintain the integrity of the mirror backing and edges and to reduce the chances of black edge developing. The Technical Services Division of the National Glass Association (NGA) has produced this Glass Technical Paper solely for informational purposes. This Paper was developed by dedicated member volunteers and subject matter experts. The original version of this document was published in 2009. This version of the document was updated and published in April 2024.