It sounds like you're dealing with some challenging settings to achieve your desired dual-color print. Here are a few suggestions that might help improve the outcome:
Ensure that your printer is well-calibrated, especially the Z-axis. Inconsistent layer heights or improper leveling can lead to the issues you described.
Experiment with different slicer settings, such as adjusting the layer height, infill density, and print speed, to see if the artifacts in the black surface can be reduced.
Consider using a different slicing software that may handle dual-color prints more effectively. PrusaSlicer, Cura, or Simplify3D are popular alternatives that offer advanced settings for multi-color printing.
If the gap between the black base and white text is causing issues, try printing a small test piece with varying gap distances to find the optimal separation that minimizes artifacts while still allowing for clean printing.
When using a dual-extruder printer, make sure your...
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