Will putting two shades of welder's glass together work as solar glasses?

It's too late to order for the Transit of Venus, but I know there's welder's glass available. Still, the welder's glass ends EXACTLY at shade 13, no shade 14. I was wondering if I bought two shade 7's, then taped them together, if they would work as solar glasses? Should I make the two lenses add up to shade 15? Or are the shades on welder's lenses not accumulative? I 'd like some professional answer, as I'm gambling with my eyes here. Maybe a shade 13 and a shade 3 would work?

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  • 8 years ago
    Favorite Answer

    There is a 14. You just don't find it in many common stores. I had to order mine from the internet. You may pay more in postage than you do for the glass itself.

    Personally, I wouldn't bother stacking lenses. It's just not worth the degradation in optical quality. Since the transit is almost over anyway, take your time and buy the right stuff.

    But welder's glass probably isn't the right stuff. It's cheap, but here's something much better:

    http://www.youtube.com/watch?v=SMzU0vjlne8

    Youtube thumbnail

    &feature=youtube_gdata

    If you do a bit of searching, you should be able to find a vendor that will sell you a small sheet or piece of solar safety film. From that you can make your own solar glasses, or filters for your telescope, binoculars, or camera You just need to cut it to size and fit it in a frame. Many just sandwich it between cardboard.

    Here's another link to what most consider "the best" film: http://www.baader-planetarium.com/sofifolie/sofi_s...

    Get the film. You need to take better care of it, but the results are well worth it. Welder's glass gives you unwanted reflections due to the distances between the front and back surfaces. The film is so thin that it doesn't matter.

    You may worry that the film doesn't look flat (as in the first video). It doesn't matter. As long as it isn't folded, creased, or wrinkled, getting a perfectly flat surface isn't necessary. It works great, and anybody should have the skills to work with the stuff.

    Source(s): Personal experience.
  • lofty
    Lv 4
    3 years ago

    Welder's Glass

  • 3 years ago

    Welders Glasses

  • Anonymous
    4 years ago

    This Site Might Help You.

    RE:

    Will putting two shades of welder's glass together work as solar glasses?

    It's too late to order for the Transit of Venus, but I know there's welder's glass available. Still, the welder's glass ends EXACTLY at shade 13, no shade 14. I was wondering if I bought two shade 7's, then taped them together, if they would work as solar glasses? Should I make...

    Source(s): putting shades welder 39 glass work solar glasses: https://tr.im/A2BGw
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  • 5 years ago

    Dr Salt suggests just looking at the sun without any protection.

    What kind of doctor is he. Even a doctor of philosophy should have some intelligence!

    Listen to Dr Karl on the radio (BBC Radio 5 live). He will tell you that he knows of people who have permanently damaged their retinas by looking directly at the sun. Do you want to spend the rest of your life with damaged eyesight for the sake of a cheap piece of glass?

    He suggests strength 13 or more.

  • 8 years ago

    Jesus, DO NOT listen to WilliamB...you need a minimum of shade 14. Stacking two lower numbered shades will not add up to a shade that will protect your eyes. Do not chance your vision on anything lower than 14! Take a look at the reference below to get an idea of what is safe and what is not.

  • 8 years ago

    i don't recommend using welding lens to view a solar event. they do come darker than shade 14. the higher the number shade, the higher the filtration value. i have a shade 25 welding filter lens used for welding exotic metals that emit very high levels of ultraviolet light, witch is the same dangerous rays coming from the sun. welding filter lenses can be stacked to increase the filtration value, and should never be mistaken for other types of filter lenses such as a very dark pair of sunglasses. my best advise, never look directly into the sun. so, use a video camera to with a view screen to record the event, then watch the recording. use the screen to find the shot, NOT the view finder( its not a filter lens) as ultraviolet light wont transmit to the recording.

    Source(s): 25 years welding and steel fabrication, amature film maker and photographer
  • Anonymous
    4 years ago
  • 8 years ago

    13 or darker is safe enough. Also, you CAN add up welding glass, using the formula S(sum) = S1 + S2 -1. S(sum) should be greater than or equal to 13.

    Read this useful post:

    http://www.polytechforum.com/metalworking/how-do-w...

    Also you can check out ISO 4850 to see detailed specs, and compare with ICNIRP published limits of the eye.

    Source(s): http://www.polytechforum.com/metalworking/how-do-w... ISO 4850: http://www.ilo.org/safework_bookshelf/english?cont... ICNIRP Guidelines- (Eye exposure limits): www.icnirp.de/documents/broadband.pdf
  • 8 years ago

    Don't be a wimp. When I was a kid we didn't need any fancy gadgets, when just stared at the sun.

    Source(s): 74 years old with 20/20 vision
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