Recycled Matte Fiber PLA prints like Matte Fiber HTPLA and requires the same special consideration when printing. A composite made with plant fibers, Matte Fiber absorbs moisture and that moisture foams the material to create an increase in volume when printing. This foaming effect means more volume of material comes out than went in, and thus requires a lower flow setting to get the expected extrusion volume (and width). The benefit is that you both use less material and create lighter weight parts for the same cross-section compared to standard PLA or even PETG. With 85% flow (80-90% is typical with low 200-205 C printing temperature), Matte Fiber's density is reduced to about 1.00 g/cc from 1.20 g/cc for parts that are stiff like Carbon fiber, but light like Nylon (and with a high heat resistance if heat treated HTPLA). It's a bit tricky, but also a great trick and useful feature once you understand how to compensate for the over-extrusion. We suggest constant volume print parameters (same speed in all extrusion (print) movements for the most consistent extrusion width, and we calibrate extrusion width by printing a single wall part for measurement to adjust flow. For more on this, please consider our support page and blog. If you still need help, please email support@protopasta.com