Multi-Color Wall Thickness Calibration

This is a calibration tool to test how think your outer wall settings need to be to prevent dark colored filaments from inside your part being visible through the light colored filament on the surface, which is a common problem when purging to a parts infill. I took inspiration from the AMS Purge Calibration tool: identify which segment on the right is opaque enough to not see the underlying filament color and the corresponding label on the left tells you the minimum width needed for your outer wall settings for that filament combo.