Along the lines of safety. Welding can be extremely harmful to your eyes. For this reason, it is crucial to always wear a welding helmet when welding. However, with the older helmets it can be difficult to see your work to start and it requires removing your element to examine your work or move around. One of the newest technologies in welding is the auto darkening helmet that starts out clear and as you create an arc it darkens to protect your eyes. When your finished, it goes clear again. These are relatively expensive pieces of equipment but extremely handy to have.
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