PVA

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Polyvinyl alcohol

[1]

Possible Support material, can (maybe) extruded with the standard extruder.

Polyvinyl alcohol (PVOH, PVA, or PVAL) is a water-soluble synthetic polymer hydrolysed from polyvinyl acetate.

PVA is fully degradable and is a quick dissolver. PVA has a glass transition temperature of around 85°C (185F), but this temperature depends on the polymer's degree of hydrolysation (ratio of alcohol groups to acetate groups). It decomposes rapidly above 200°C as it can undergo pyrolysis at high temperatures.

PVA works better with PLA. With ABS, depending on the model shape, It may not stick properly.

Polyvinyl acetate

Polyvinyl acetate (PVA, or PVAc) is more commonly known as white glue, wood glue, all-purpose glue, school glue, and Elmer's Glue.

PVAc is most commonly used in 3d printing as an agent to aid material adhesion to the print bed, and works particularly well with glass beds. PVAc is generally applied as a dilute emulsion in water and allowed to dry before printing. User feedback suggests that PVAc-prepared glass is suitable for printing PVC, PLA and Nylon, and a single treatment remains effective for multiple prints.


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Further reading