To ensure optimal results, several important steps must be completed before glass is introduced into a glass tempering furnace. These include proper cleaning and inspection processes, as outlined below:

1. Thorough Cleaning of the Glass

Before tempering, glass must be thoroughly cleaned to remove dirt and debris. This includes residues from cutting, drilling, or edge grinding. If the glass is not cleaned properly or remains damp with water spots, these imperfections can result in surface defects after tempering, which will be impossible to correct.

2. Drying Process

After cleaning, ensure the glass is completely dry. Any water stains left on the surface can cause visible defects after tempering.

3. Final Inspection Before Tempering

Introduce a re-inspection step before the glass enters the tempering furnace. Damage sustained during earlier processes, such as scratches or chips, can significantly affect the quality of the tempered glass. This additional inspection ensures the quality of the raw glass and acts as a final checkpoint for defects missed during initial quality control.