These glass palettes are practical and economical-dried paint is easily scraped from the non-porous glass, which has a white vinyl backing for accurate color mixing and extra safety. Suitable for oils, alkyds and acrylics, these palettes are light-weight, strong and comfortable to hold, with smooth rounded edges. The classic oval (shown with paint) and the angled oval with a flat edge for easier scraping are made of tempered safety glass, five times stronger than regular glass. Use the rectangular styles for tabletop use. They work well for paint or rolling out printmaking inks and are made of break-resistant craft glass. The larger rectangle is not vinyl-backed.