When choosing slate for laser engraving coasters, it’s essential to consider both the quality and type of slate to ensure excellent results. The recommended type of slate is natural slate, specifically deep, dark slate that provides high contrast with the engraving. The smoother the surface, the better the engraving will appear, so select slate that has been properly finished.

Look for slate that is at least 1/4 inch thick to withstand the laser engraving process without breaking or chipping. Additionally, black or dark grey slate works best as it allows for clear visibility of the engraving, making the designs stand out.

Another consideration is to choose slate that is free from impurities and inconsistencies, as these can affect the quality of the engraving. Some brands also offer pre-treated slate specifically designed for laser engraving, which can be a convenient option. Overall, ensure that the slate you choose is durable and suitable for both use and aesthetic appeal, as this will enhance the overall quality of the finished coasters.