Additive Technologies - Vat Polymerisation & Material Extrusion

True or false?

Stereolithography uses a laser to cure liquid resin into hardened plastic?

• TRUE

• FALSE

True or false?

Digital light processing is a type of vat polymerisation?

• TRUE

• FALSE

True or false?

Stereolithography was the first 3D printing technology ever developed?

• TRUE

• FALSE

Which of the following best describes a photoinitiator?

• Photoinitiators are deposited from a printhead into the liquid resin and absorb heat when an infrared heater is passed over the printbed

• Photoinitiators are not used in vat polymerisation but are used in material extrusion

• Photoinitiators absorb ultraviolet or visible light to for free radicals or cations that then react with photopolymers to enable crosslinking

• Photoinitiators are broken down into smaller components using a laser that then electrostatically interact with resin droplets to create bonds

Which of the following is a common use of photoinitiators in 3D printing?

• To increase the temperature of the print bed

• To initiate the polymerization process in resins

• To enhance the mechanical properties of the printed object

• To reduce the viscosity of the resin

Which of the following is a disadvantage of using photoinitiators in 3D printing?

• High cost

• Limited availability

• Potential health hazards

• Slow curing time

True or false?

Stereolithography can only create objects using plastic materials?

• TRUE

• FALSE

Which of the following materials can be used in stereolithography?

• Metals

• Plastics

• Wood

• Glass

True or false?

Stereolithography can produce parts with high detail and smooth surface finishes?

• TRUE

• FALSE

Which of the following is a key advantage of stereolithography?

• Low material cost

• High production speed

• Ability to produce complex geometries

• Minimal post-processing required