Poly Vinyl Alcohol (PVA) plastic is for 1.75mm extrusion and has been tested on all Zinter 3D Printers. It has been designed to be water soluble. You can just swap the filament from your extruder, and load in the PVA filament as normal, then build objects just like you would with ABS or PLA.  The prints come out a matte white color and smell a bit like white craft glue. 


IMPORTANT! Please note that extrusion temperatures are different to ABS or PLA and storage requirements are higher. NEVER leave PVA  on your machine when not using it. Also remember to run load long enough to flush out the previous filament or the first layers may not dissolve. 

 

Please read the below instructions and adjust your machine prior to use.

 

How To Use PVA

PVA has a low melt point, and will flow (become liquid) at only 185-190ºC. Different manufacturers specify specific print temperatures but its usually around 185-195ºC.  

 

Important: PVA is also sensitive to higher temperatures, and begins to undergo pyrolysis at higher than 200ºC, which may block your nozzle.


If PVA is left to sit at temperatures higher than 200ºC for extended periods of time, it will form tar jams that are extremely difficult to remove. Unlike PLA and ABS, you cannot remove a PVA jam by increasing temperature or drive force.


A jammed nozzle will often need to be re-drilled or replaced!


So please make sure when rendering your file for printing make sure you adjust the extrusion temperature. 

 

Storage : Light and water sensitivity  DO NOT LEAVE PVA ON YOUR MACHINE WHEN YOU ARE NOT PRINTING!  PVA absorbs moisture once the packaging is opened, and will quickly become uselss! 

 

Damp material may be dried out at 60–80°C for 6–8 hrs in a circulated air dryer. Moist material may bubble when printing, or even fail to extrude.

 

PVA should remain stable for 6-12 months in an air tight, light tight container in dry conditions

 

Dissolving PVA

PVA dissolves rapidly with simple submersion in water.  Fine parts will begin to dissolve immediately! 

 

To speed up dissolving, gentle stirring can be applied.  Warm water also speeds up the process.