Spin casting curing uses which type of light?

Spin casting curing uses which type of light?

• A. UV Light
• B. Infrared
• C. Visible Light
• D. X-ray

Answer: (A)

Spin casting cures its resin through photopolymerization: a UV-curable monomer mixture contains photoinitiators that, when exposed to UV light, generate reactive species that rapidly crosslink the polymer to harden the lens. This allows a quick, surface-initiated cure at room temperature, which is ideal for forming a stable, uniform lens as the mold spins. Infrared would mostly heat the material rather than start polymerization. Visible light can cure some systems, but many ophthalmic formulations are optimized for UV-activated initiators to achieve faster cure times. X-ray isn’t used for curing in this context.

Spin casting cures its resin through photopolymerization: a UV-curable monomer mixture contains photoinitiators that, when exposed to UV light, generate reactive species that rapidly crosslink the polymer to harden the lens. This allows a quick, surface-initiated cure at room temperature, which is ideal for forming a stable, uniform lens as the mold spins.

Infrared would mostly heat the material rather than start polymerization. Visible light can cure some systems, but many ophthalmic formulations are optimized for UV-activated initiators to achieve faster cure times. X-ray isn’t used for curing in this context.