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Medical Forum / General / Vision / February 2008Remove hard water stain from Eye glasses
The other week I noticed my eye glasses had dried hard water stains on them. This seems to have accumulated over time. My lenses are glass lenses (not plastic). I thought that the lens cleaning solution you get at the optical stores would do the job - that did not help. Also tried vinegar, but no success. Is there any to get rid of these dried stains. If not, the option is new lenses. Appreciate any advice. Thanks. It's probably not a deposit, but a coating that's peeling off. I'm not sure coatings can be removed from glass. -MT > The other week I noticed my eye glasses had dried hard water stains on > them. This seems to have accumulated over time. My lenses are glass > lenses (not plastic). I thought that the lens cleaning solution you > get at the optical stores would do the job - that did not help. Also > tried vinegar, but no success. Is there any to get rid of these dried > stains. If not, the option is new lenses. Appreciate any advice. > It's probably not a deposit, but a coating that's peeling off. > [quoted text clipped - 10 lines] > > - Show quoted text - maybe you should try some clr? >The other week I noticed my eye glasses had dried hard water stains on >them. This seems to have accumulated over time. My lenses are glass >lenses (not plastic). I thought that the lens cleaning solution you >get at the optical stores would do the job - that did not help. Also >tried vinegar, but no success. Is there any to get rid of these dried >stains. If not, the option is new lenses. Appreciate any advice. If they are hard water deposits, then soaking them in vinegar would absolutely take them off. If you've done that, and they haven't gone away, then what you may be looking at is etching. Basically, very fine scratches that accumulate over time, and give a fogged appearance.  Signature- Mike Ignore the Python in me to send e-mail. In article <c1069731-ee36-4143-a871-264f9be3d830@e23g2000prf.googlegroups.com>, > The other week I noticed my eye glasses had dried hard water stains on > them. This seems to have accumulated over time. My lenses are glass [quoted text clipped - 4 lines] > > Thanks. If you truly have HARD WATER stains, I am hard put to come up with an idea of what the source of your problem can be. The usual hard water arises from dissolved calcium bicarbonate that turns into insoluble calcium carbonate upon heating heating or exposure to the atmosphere. That material, however should be easily removed with a weak acid like vinegar. "Permanent" hard water will usually arise from totally soluble minerals such as magnesium sulfate. They will interact with ordinary soap to make a poorly soluble soap. Could that be problem? That is, have you tried to clean your glasses with soap? Beyond that, there may be some rarer kinds of hard water such as dissolved iron. Upon exposure to air, a valence change may occur that oxidizes the iron into an insoluble form (rust). That is not likely. You should be able to get a list of impurities in the water from your water supplier. Bill In article <c1069731-ee36-4143-a871-264f9be3d830@e23g2000prf.googlegroups.com>, > The other week I noticed my eye glasses had dried hard water stains on > them. This seems to have accumulated over time. My lenses are glass [quoted text clipped - 4 lines] > > Thanks. If you truly have HARD WATER stains, I am hard put to come up with an idea of what the source of your problem can be. The usual hard water arises from dissolved calcium bicarbonate that turns into insoluble calcium carbonate upon heating heating or exposure to the atmosphere. That material, however should be easily removed with a weak acid like vinegar. "Permanent" hard water will usually arise from totally soluble minerals such as magnesium sulfate. They will interact with ordinary soap to make a poorly soluble soap. Could that be problem? That is, have you tried to clean your glasses with soap? Beyond that, there may be some rarer kinds of hard water such as dissolved iron. Upon exposure to air, a valence change may occur that oxidizes the iron into an insoluble form (rust). That is not likely. You should be able to get a list of impurities in the water from your water supplier. Bill
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