FiberSmooth is a material from the low shrinkage PVB group. It is easy to process by smoothing it with isopropyl alcohol (IPA). The filament immersed in the liquid or exposed to its vapors, partially dissolves, thanks to which the outer contours stick together, covering the boundaries of the layers / This allows to obtain a shiny porcelain surface. If the color of the transparent filament is used, it is possible to obtain almost transparent walls.
The filament is print-friendly, but has a weaker adhesion between the layers, so it is recommended to have a higher temperature of the bed so that the model does not peel off.