Prepare the Objects: Make sure any objects you need to embed are totally dry. Humidity can interfere Using the curing process and trigger bubbles or cloudiness. At the time your resin has been poured in the molds and it has had time to treatment, it's time to demold your coasters. https://eduardoitbes.blogaritma.com/29862387/5-simple-techniques-for-epoxy-resin-tips