Purge Block A purge block is a sacrificial structure used in multi-material or color 3D printing to purge the nozzle of residual filament, ensuring clean color transitions. It collects excess material during color changes, preventing contamination and enhancing print quality. Purge blocks are generated by slicing software, customized in size and position. Optimizing purge settings reduces material waste and print time. Advanced printers use wipe towers or purge buckets as alternatives. Proper purge management ensures sharp color separation and consistent extrusion.
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