Anyone who is doing any welding or is watching someone do it needs to wear a welding cap. In some cases, this is not absolutely necessary. For example, think being MIG welding flash on a bright sunny day is not bad. The reason helmets are needed is because of the insanely bright light emitted by welding. If safety precautions are not taken, this light can actually burn the inside of your eyes and cause temporary or permanent blindness.
Part of the reason for this is that, especially in dark places, the eyes can't adjust to changes in brightness fast enough to prevent damage. A good welding cap will protect you not only from flying sparks, but also from the incredibly brilliant welding arc. A good helmet is usually easy to see through, but will automatically dim the moment a welding arc is detected. You can usually tell the helmet is on by looking up at the sun, which should cause the helmet to trigger its auto-darkening ability. This is a good test to do before welding, because if you're not careful, starting with your helmet off could damage your eyes.
Older welding caps were less convenient: they had a permanent dark filter, so it was almost impossible to see what you were doing before you started welding. We are fortunate that modern technology has brought such ease of use and safety to something that could otherwise be very dangerous. Most welding supply stores and many online stores sell good welding caps.
YULONG Safety Tools Manufacturer Corp.,Ltd. is a professional safety equipment producer in China with more than 20 years. We are Specialized in Head Protection, Eye and Face Protection, Hearing Protection, Respiratory Protection, Knee Protection etc. YULONG SAFETY has passed ISO 9001 Internal Quality system Certification. All product passed CE, ANSI, CSA, EMC etc. With experienced development teams and complete production supporting facilities.
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