// Definition
The process of filtering cannabis extracts through increasingly fine mesh or filter screens measured in microns to remove contaminants, plant material, and unwanted particles. Can range from basic coffee filter processes to sub-5-micron pharmaceutical-grade filtration.
// From the Episode
The discussion covered how multiple micron levels of filtration can progressively clean an extract. Bubbleman described using filtration from basic levels down to 5 microns or even half a micron for maximum purity. The panel noted that microfiber filtration is an art form, and that different micron sizes catch different types of contaminants while preserving the desirable trichome heads.