| A£ºNo. Again, all helmets that comply with the current ANSI Z87.1 standard (when in the proper down position) always protect operators from the harmful UV and IR emissions from the arc. This protection occurs whether the lens is darkened or not. However, the faster the helmet darkens, the more likely it is to prevent discomfort from the high-intensity visible light. Less than a millisecond in response time is not perceivable by the human eye and will provide the most comfort. Look for a helmet that has a response darkening time of a millisecond or less. |
