All About Sandstone 3D Printing Filament: Materials, Properties, Definition 3D printing filament is a material used in the 3D printing process to create a three-dimensional object. It is a type of thermoplastic, which is a polymer that softens when heated and hardens when cooled. One of the most popular filaments for 3D printing is sandstone … Continue reading All About Sandstone 3D Printing Filament: Materials, Properties, Definition