Support Material

Material used to support any part of a 3D-printed object that is unsupported until it solidifies, much like a brassiere, see support structure.

Support Structure

Feature added to a part in some RP methods that is removed after building is finished, used to maintain accuracy while building in areas of overhangs or undercuts.

Thermoplastic

Material often used in 3D printing that softens when heated, shapes into layers of a given printed object, and solidifies when cooled.

UFP

Ultrafine particles, said to be emitted during 3D printing and potentially harmful in poorly ventilated areas.

Unfinished

Description of the raw surface finish of a part produced directly by the prototyping machine (that has layer lines or stair stepping visible) before excess material and supports are removed.

Viscosity

Property of fluids determining their resistance to flow (the higher the viscosity, the more difficult it is to dispense a certain material onto a printing bed and the less it will change shape until hardening).

Vitamin

A non-replicated part, or something needed to build a 3D printer that cannot be printed on said 3D printer.

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