What is Basic PLA, and why does it suit prototyping better than a specialty filament?
Basic PLA is unmodified polylactic acid with a narrow molecular weight distribution and no fillers or impact modifiers. That gives predictable melt flow: the extruder pushes a steady bead, the part cools to a stiff, dimensionally accurate shape, and every print revision is comparable to the last. Fillers such as wood, marble or carbon additives change the flow and the surface, which adds variables to a fit check. For rapid prototyping the goal is repeatability and speed rather than toughness, so a consistent single-grade PLA is the right material. Nozzle temperature 190-220 °C.
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