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A user sets infill density to 0% but notices the print is not hollow. What is the most likely cause?

medium📝 Analysis Q6 of 15
3D Printing - Slicer Software Basics
A user sets infill density to 0% but notices the print is not hollow. What is the most likely cause?
AThe filament is too thick to leave hollow spaces
BThe printer ignored the infill setting
CThe nozzle temperature was too high
DThe slicer adds a solid bottom and top layer regardless of infill
Step-by-Step Solution
Solution:
  1. Step 1: Understand 0% infill meaning

    0% infill means no internal fill, but slicers still print solid top and bottom layers.
  2. Step 2: Explain why print is not hollow

    These solid layers create a closed shell, so the print is not hollow inside.
  3. Final Answer:

    The slicer adds a solid bottom and top layer regardless of infill -> Option D
  4. Quick Check:

    0% infill still prints solid top/bottom layers [OK]
Quick Trick: 0% infill means hollow inside but solid top/bottom layers remain [OK]
Common Mistakes:
  • Assuming 0% infill means fully hollow print
  • Blaming printer hardware for infill issues
  • Confusing filament thickness with infill

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