Advantages of Single Wavelength in LEDUV Curing Lamps

Wavelength plays a crucial role in LEDUV curing, with different wavelengths tailored to
specific applications. Let�s
explore the functions of wavelengths in LEDUV curing lamps.

LEDUV is a single-wavelength invisible light, typically below 405nm, primarily 365nm and
395nm. The shorter
365nm wavelength operates at deeper layers, while the longer 395nm wavelength operates
on the surface of inks
or coatings. This is because shorter wavelengths are absorbed at the surface and cannot
reach deeper layers.
Insufficient exposure to short wavelengths leads to a sticky surface, while insufficient
energy from long
wavelengths results in poor adhesion. When curing UV inks and UV adhesives, a pure
wavelength light source is
provided, with specific wavelength absorption peaks matching specific curing
requirements. Energy is
concentrated at the effective wavelength, ensuring precise curing and minimizing waste.

In contrast, traditional mercury lamps emit energy across both wavelength ranges as mixed
wavelengths. They
deliver strong energy in the short-wavelength range, but most long-wavelength energy is
unused for curing, with
only a small portion of relevant wavelengths contributing to the process�resulting in high
energy consumption.
This is undesirable in today�s era of energy conservation and environmental protection.

For many highly specialized applications�such as curing materials containing large
amounts of pigment additives
like titanium oxide, or curing through plastic or glass�long-wavelength curing is
essential. These materials
almost completely block short wavelengths, making pure wavelength light sources (i.e.,
LEDUV light sources) the
only viable option.