PVA (Polyvinyl alcohol) is a water-soluble thermoplastic. In 3D printing it is mainly used as a support material.
How to store and dry PVA
- We recommend to store the PVA in its plastic bag and with the silica gel.
- If your material “blobs” while printing, dry it for 6-8h @ 60°C.
- Depending on the ambient moisture, it will take 1-3 days for the spool to get saturated and has to be dried again before using.
- If left in an open environment for longer than 3 days it should be dried before using.
- For longer prints we recommend to use our filament enclosure box for the BigRep ONE.
How to print with PVA
We highly recommend to use our released factory file for the PVA as it is.
- Please take a look on the factory file article for the ONE and for the STUDIO if PVA in combination with another material is released.
- On the ONE use T1 (right extruder) for PVA and T0 (left extruder) for your main material.
- On the STUDIO use T0 (right hotend) for PVA and T1 (left hotend) for your main material.
- It is possible to print only the dense layers with PVA, but it is only recommend for users with experience in printing with PVA.
- While printing, the not used extruder will be cooled down to avoid clogging the nozzle with the PVA and to increase the printing quality.
- Always extrude 300 mm of Filament after printing to ensure that your hot end is clean.
How to remove PVA
- For optimal and fast dissolving, remove as much support as possible manually, and then introduce the printed part in water.
- For better / faster results, we recommend to use moving warm water (35°C max).
- Even if normally the PVA will be solved within 12h, be patient, as sometimes – depending on the size and geometry of the part – the removing process can take up to 48h.
PVA in dual extrusion with other materials
PVA is working with PLA. To make sure the PVA is sticking fine to the bed, we recommend to use our glue.