This is a clean two color biohazard warning sign that I designed for fun and printed on my Bambu system. The goal was to make something bold and eye catching without going overboard. The sign has a smooth outer frame with a bright textured interior panel that really pops against the black emblem. It looks great on a bedroom door, workshop door or anywhere you want a bit of style mixed with humor.

I printed mine with AMS palette swapping so the transitions came out sharp. The texture pattern on the yellow background gives it a cool woven look up close and the emblem sits raised on top with a crisp edge. It is lightweight and easy to mount with double sided tape. Total print time was around two hours which makes it a quick weekend project to add some personality to a space.

This design ended up looking so clean that I might do a full set of hazard signs later on for fun. If you print one feel free to color swap it or make a neon variant. I would love to see how people customize theirs.

Print Notes-

Printer:

• Bambu Lab A1 or P1 Series

Nozzle:

• 0.4 mm standard

Material:

• PLA

• Yellow for background

• Black for frame and emblem

Layer Height:

• 0.30 mm for a fast print

• 0.20 mm for sharper detail

Walls:

• 3 perimeters

Top Layers:

• 4

Bottom Layers:

• 4

Infill:

• 15 percent

• Grid or Gyroid

Supports:

• None required

• Model prints flat on the plate

Cooling:

• Standard PLA fan settings

Speed:

• Default Bambu “Normal” works perfectly

Color Changes:

• AMS two color

• Or manual swap at the designated layer

Build Plate:

• Smooth PEI or textured PEI

Mounting:

• Double sided tape on the back

Biohazard Door Sign Warning Plaque