– Multicolor 3D printing with affordable devices now possible without manual filament changes
– Prusa ColorMix achieves mixed colors by stacking different colored layers in depth, not on the surface
– Mixing ratio and number of producible colors are limited
– Workflow simplified with settings directly in PrusaSlicer and EasyPrint
– CMYKW set in development for more reproducible results; filament shade consistency and color-accurate monitors matter for best outcomes
Multicolor 3D Printing Gets a Upgrade with Prusa ColorMix
3D printing in multiple colors is now possible even with relatively affordable devices without having to change individual filaments manually. If only one print head is used, however, cutting the filament and therefore generating waste is unavoidable. Users are also naturally limited to the colors they have available as filament. Prusa ColorMix, a new system released under the MIT license, has now been introduced and could significantly simplify multicolor printing in terms of material requirements.
How the Technology Works for Better Color Mixing
The basic principle does not fundamentally differ from conventional two-dimensional color printing. The human eye has limited resolving power, so differently colored dots effectively blur into a mixed color. However, Prusa ColorMix does not alternate the dots across the surface but in depth. The layers stacked on top of each other then form the mixed color. There are limitations. For example, the mixing ratio cannot be freely selected, and the number of colors that can be produced this way is also limited. According to Prusa, the workflow itself has been significantly simplified, with the corresponding settings available directly in PrusaSlicer and EasyPrint.
Development of CMYKW and Color Accuracy Considerations
A CMYKW set is also in development, which could lead to more reproducible results. Optimal results should only be expected if the source filaments match the same shade across batches, not just the same basic color. The integrated color mixing model is intended to predict which color will actually be produced in a print. In such cases, a monitor that is not necessarily calibrated but at least reasonably color-accurate could become relevant.
Additional Insights and Recommendation for Readers
Prusa’s blog post is also recommended beyond the announcement itself, as it discusses various color mixing models and the insights gained during development. The system aims to make multi-color printing more accesible while reducing waste, although users must still consider filament batch consistency. Understanding these limitations helps in achieving the best possible print results.
