Line a few baking sheets with Silpat nonstick baking mats or parchment paper.Pour the melted sugar mixture in a line down the center of the pan. Using a skewer or the flat edge of a large knife, spread sugar into a thin flat sheet. Glass slides are pretty thin, so the thinner the better. It will also be easier to cut in the next steps.
Once you have the mixture spread into a flat sheet, let it cool and harden for 5-10 minutes. Once the mixture is hard, pull it away from the mat or parchment. If its super thin, try not to crack it.