Radiation Hazard Sign – 3D Printable Warning Plate (Scalable & Multicolor)

Add a bold and unmistakable warning to any environment with this 3D-printable Radiation Hazard sign. Featuring the classic trefoil radiation symbol within a high-visibility triangle, this sign is ideal for laboratories, nuclear-themed escape rooms, industrial settings, Halloween decor, or themed setups.

Design Features

• Universal Warning Symbol

•  Features the internationally recognized radiation hazard icon — the three-bladed trefoil — clearly framed inside a thick triangular border.

• Multicolor Compatible

•  Designed for multi-material printers (AMS/MMU) or manual filament swaps to print in distinct yellow and black sections for maximum contrast.

• Scalable Layout

•  Can be resized freely to fit your needs — from small desk signs to large wall-mounted warnings — without losing clarity or proportion.

• Support-Free

•  Optimized for clean printing with no supports required.

Technical Specifications

• File Format: STL, 3MF

• Recommended Size: 120–200 mm per side (adjustable)

• Printing Layer Height: 0.2 mm

• Supports Needed: None

• Infill: 15–100% depending on use case

• Mounting: Flat back, easy to attach using adhesive tape, magnets, or screws

Printing Tips

• Materials:

• PLA for indoor use

• PETG or ASA for outdoor/high-durability

• Colors:

• Yellow for the triangle background

• Black for the trefoil symbol and outline

• Multicolor:

•  Works great with AMS or manual swaps at the transitions between border and background, and again for the symbol.

Ideal For

• Labs & Facilities: Clearly mark radiation zones or equipment

• Themed Events: Add realism to escape rooms, movie sets, or Halloween displays

• Decor & Cosplay: Striking addition for fans of sci-fi, industrial, or post-apocalyptic aesthetics

Print your radiation hazard sign today and make sure everyone—staff, guests, or visitors—sees and respects the warning!