229 Printing & Prototyping


No eating or drinking. Three horizontal lines representing a sandwich alongside a cup with straw.
No Food or Drink

When hazardous materials are being handled in the lab, food and drink consumption is prohibited.

General prohibition sign. Red circle with diagonal slash.

No Lone Working

Users of the space must always have at least one buddy. 

Personal Protective Equipment (PPE)

Wear eye protection. Human head (front view) wearing eye protection.

Safety Glasses

Safety glasses must be worn while handling hazardous materials such as Nylon 12 powder or printer resins.
Wear a mask. Human head (left-hand profile) wearing a mask.
N95 Mask or Equivalent 
An N95 mask or equivalent respiratory protection must be worn while handling hazardous materials such as Nylon 12 powder or printer resins.
Wear protective gloves. Two protective gloves, one shown in front, the other shown behind (outlined).
Protective Gloves 
Nitrile protective gloves must be worn while handling hazardous materials such as Nylon 12 powder or printer resins.


Warning; Laser beam. Circle with 24 regular equally spaced radiating lines, 12 shorter of equal length, 11 longer of equal length and one longer reaching horizontally the right-hand side of the triangle .
Laser Beam
The lab has two Class IV lasers which operate as Class II lasers when fully closed and the interlocks aren’t defeated. When run as Class II lasers, no PPE is required as the windows protect the operator from harmful radiation.
Warning; Hot surface. Three parallel, vertical, s-shaped lines above a horizontal straight line.

Hot Surfaces

Printer outer surfaces and, especially, internal build chambers will become hot during use. Additionally, lasered material may be warm, even hot to the touch immediately after lasering.

Warning; Crushing of hands. Hand between two horizontal lines, vertical arrow pointing downwards.

Entanglement & Pinching

Rotating machinery in the lab may present entanglement and pinching hazards during operation. This includes operation of the Fuse Sift’s cartridge mixer and laser rotary functions.
Warning; Flammable material. Flame, horizontal line underneath.
Combustible & Flammable Materials 
Combustible & Flammable Materials
Warning; Toxic material. Skull (outlined), behind it two crossed bones (outlined).
Poisonous Substances
Many printing materials are toxic when ingested such as Nylon 12 powder and printer resins, so appropriate PPE must be worn when handling.
Warning; Asphyxiating atmosphere. Human figure (right-hand profile) sitting, legs straight, head bent forward and arms hanging, dots around the head and upper body and into the lungs.
Airborne Poisonous Substances
3D printer powder has the potential to become airborne. Avoid touching loose powder and clear room of unmasked personnel upon the event of a spill.
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