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Single-Extruder Dual-Color 3D Printing Guide

Learn how to produce high-contrast, multi-color badges and keychains without an expensive multi-material unit.

Step 1: Determine Your Separation Layer

Using the STLKit3D Color-Swap Calculator, find the exact Z-height where your base plate stops and raised geometry begins (typically 2.6 mm to 3.0 mm).

Step 2: Add Pause in Your Slicer

1. Slice your model with your standard profile (0.20 mm recommended).
2. Move the layer preview vertical slider to the target swap layer.
3. Right-click the plus (+) icon on the layer slider:
   • PrusaSlicer / SuperSlicer: Select "Add color change (M600)".
   • Bambu Studio / OrcaSlicer: Select "Pause".
   • Cura: Use Extensions > Post Processing > Modify G-Code > Pause at Height.

Step 3: Filament Purge Procedure

When the printer pauses and beeps, pull back the base spool and insert your contrasting color. Ensure you purge until the extruded plastic runs 100% clean with no color bleed before resuming.