This PVA (Poly Vinyl Alcohol) is water soluble and comes on a 500g spool (approx 140m), a more handy size for experimentation, and is for 3mm extrusion. We have had is manufactured to be easier to use and dissolve than the Makerbot brand PVA. We have tested it on Makerbot 3D printers.

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- just change the extrusion temp to 185-195 degrees

We have experimented and tested it and produced a fact sheet with some cool dissolving Octopus photos - check it out http://www.bilby3d.com.au/BilbyCNCPVAFactSheet.pdf OR check out the dissolving octopus here:Dissolving Octopus
NOTE PVA works well with a cold bed and PLA as the model. It does not pair well with ABS as ABS will not stick to PVA and vise versa

HIPS (High Impact Polystrene) Filament is designed to dissolvable easily in a limonene bath in just 8-24 hours (depending on size and geometry of print). Limonene is a common, colorless, citrus-scented solvent available online and in grocery/home stores. (available from us - search Dissolve Away)

Genuine Raise 3D Premium PVA Filament >> NOW REPLACED WITH PVA PLUS PVAP175RP750