Visual Distortions in Glass
There is a certain element of distortion that can affect the appearance of the glass during the ‘toughened glass’ manufacturing process.
Anisotropy also known as stain pattern, quench marks or leopard spot is not classed as a glass defect. This ripple appearance of the glass is seen when viewed from a certain angle or time of day.
The characteristic pattern is caused by differing layers of ‘stress or tension’ when light passes through certain areas of the glass. It is not a cause for concern and will not affect the quality and longevity of the glass.