|A tempering logo is a small etching that is made in one corner of each piece of glass indicating that it has been tempered and meets government standards for tempered glass. For a sample, just check out your car windows. Have you ever noticed that each of them has a logo in the corner indicating that it was tempered? We can add our logo to any piece(s) in your order. For many decorative projects (like table tops or shelves) you may not need or want a logo to detract from the beauty of the glass. But depending on your project, a logo may be required. Since we service so many areas with varying laws and regulations, you'll need to check with a local building inspector or your contractor to see if your glass requires a logo. The default for us is to not logo the glass so you will need to specify on the Order Form if you wish to have us logo your glass.