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Process › Strength› Top/bottom shellstop_color_penetration_layers

Top paint penetration layers

In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it to5

It changes with the Bambu Lab A1 factory profile:0.08mm Extra Fine90.08mm High Quality90.12mm Fine50.12mm High Quality50.16mm High Quality60.16mm Optimal60.20mm Standard50.20mm Strength50.24mm Draft40.28mm Extra Draft4Why does it change?

When you paint a top face a different color with the paint tool, this sets how many layers down that color goes. It only matters in multicolor prints.

How it works

When you paint a surface with the color brush, coloring just the last layer isn't enough: with light filaments, the color underneath shows through. This setting carries the painted color several layers inward, like a thick coat of paint.

With 5 layers (the default on the A1), the color looks solid with almost any filament. More layers mean more filament changes and more purging, which is the plastic the printer throws away every time it switches colors.

When to change it

  • A sign with white or yellow letters painted on a black base, and the black shows through: raise it to 6 or 8.
  • A keychain with a name painted in a dark color on a light background: 3 is enough and you save purge.
  • A part with lots of colored areas where purging drives up the time and the wasted plastic: lower it to 3.

Typical values

ValueWhat for
3Less purge; filaments that cover well
5Defaultdefault
8Light colors that show through

Watch out for

  • If you don't use several filaments or paint any areas, it does nothing.
  • Every layer with two colors needs its own filament change and purge: print time climbs fast.

Goes well with

What Bambu Studio says

This is the number of layers of top paint penetration.

Bambu Studio tooltip for this setting · AGPL-3.0

Read more at the official source