Q. What causes glass table scratches?

Answer

Debris from the manufacturing process is the primary source of scratches in tempered glass. It's a quality control issue that makes tempered glass less durable and makes it more difficult to avoid scratching the surface while cleaning. One of the most important phases in producing tempered glass, as reported by Scientific American, is washing the glass after it has been cut to size or form and polished to remove sharp edges. The glass is not always properly cleaned before being put into the tempering furnace at certain manufacturers. During the tempering process, any dust or debris that is left on the glass will fuse to the surface.