Prusament PVB – our new transparent filament designed for easy chemical smoothing

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We are excited to announce that we once again expand our Prusament portfolio, this time with 6 colors of new, unconventional material PVB. This type of filament is great for printing design models because the material is very easy to post-process with isopropyl alcohol (IPA). The surface of PVB prints can be smoothed out and parts can be easily glued together. Let’s take a look at the details!

Specification

PVB has similar mechanical and printing properties to PLA. However, thanks to its transparency and easy smoothing with IPA, this material is most suitable for the production of visual models, such as unconventional vases, jewelry, lamps, and other art pieces. The most ideal are models that should be printed with transparent filaments. It’s good to tweak various print settings, such as layer height, the number of perimeters, and infill density to make it look even better. Plus, we recommend using the vase mode in combination with a larger nozzle diameter.

Keep in mind that PVB is not the best option for printing mechanical parts. Its dimensional stability, tensile strength, and impact tenacity resembles CPE (and low-tier PETG) but its temperature resistance and layer-to-layer adhesion are similar to PLA.

Cons Poor layer to layer adhesion (slightly worse than PLA) Low temperature resistance Hygroscopic filament (absorbs moisture) Higher price Our colors and price

PVB comes in six colors: Prusa Orange Transparent, Bright Green Transparent, Dark Blue Transparent, Light Yellow Transparent, Natural Transparent and Smoky Black Transparent. All colors are available on 500 g spools for 24.99 USD/EUR (VAT incl.). Plus, for the same price, we offer a box of samples that includes 25 g of each color available – this way you can try them all and find out which color is the best for you. We also prepared a set of test models for you!

To make printing with the 25 g samples easier, we recommend using this special sample holder that can be assembled using two 3D printed parts and an empty Prusament spool.

Printing with our new nozzles

With PVB comes a new 0.8mm nozzle! You can order it now for 8.46 USD / 6.99 EUR (VAT incl.) from our eshop. There’s a good reason for releasing PVB and larger nozzles simultaneously: It’s much easier and faster to print PVB models with vase mode and a 0.8mm nozzle. The walls will be more solid and more resistant to deformation caused by IPA smoothing. Models printed with 0.8mm nozzle and vase mode can be smoothed so well, they look almost like glass.

PVB chemical smoothing

Before we start with how-to manuals, let’s sum up basic safety rules. IPA is slightly less toxic than other substances used for smoothing (acetone, chloroform, dichloromethane etc.) but it’s still an organic solvent. Always work in a well-ventilated environment and use gloves and other protective equipment (glasses, respirator). Do not pour used IPA into drains and waste pipes! IPA can be used multiple times. Once it loses its properties, contain it in a bottle and dispose of it as a dangerous substance (according to your local legislative rules).

The main advantage of PVB is chemical smoothing. Unlike other materials, PVB can be dissolved with IPA. This solvent is less toxic than other used chemicals (acetone etc.)

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