Powertex Bister is a potent pigment available in spray or granule form. Read a series of blogs about using Bister with some tips for your own art and projects. Download the free guide for advice on using Powertex Bister. To use Bister in your mixed media art I recommend my Powertex Bister Masterclass. This digital download is everything I teach in my Bister Masterclass Workshop and is available for instant download in the Kore Sage Art Etsy shop.