Metal halide lamps, often referred to as iron lamps, are a type of high-intensity ultraviolet (UV) light source that offers enhanced performance compared to traditional mercury lamps. While standard mercury UV lamps typically emit their highest peak at 365 nm, they may not be suitable for newer inks or specialized applications that require wavelengths such as 380 nm and 403 nm. Fortunately, metal halide lamps can produce these higher peaks through the use of various blends, including mixtures of mercury and argon, along with additives like iron, potassium, or other rare earth metals. Iron-doped halogen lamps, in particular, significantly boost the 380 nm wavelength, while potassium-doped versions enhance the 403 nm and 417 nm peaks. This makes them more versatile for a wide range of industrial and printing applications.
These lamps are widely used in UV curing processes, such as for UV inks, paints, dry films, wet films, and green solder masks. They are especially effective in screen printing and color curing, particularly when dealing with thick coatings, white, or black materials that require faster and more efficient drying. Their ability to deliver intense UV output over a broader spectrum makes them an ideal choice for modern manufacturing and printing technologies where precision and speed are essential.
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