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Cleaning stubborn particles/repair

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kingoslo View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kingoslo Quote  Post ReplyReply Direct Link To This Post Topic: Cleaning stubborn particles/repair
    Posted: March/18/2012 at 06:31
Hello there,

This not really a rifle scope, but I thought the question is so similar that it is arguably useful for the audience.

I have a microscope. It has a central main objective. It seems the previous owner had an accident and sprayed some particles onto the surface of the bottom lens:





I have tried cleaning with isopropyl alcohol, acetone and a polyurethane paint solvent. It didn't help.

What is your advice?

Thank you for your time.

Kind regards,
Marius Jonsson
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bugsNbows View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bugsNbows Quote  Post ReplyReply Direct Link To This Post Posted: March/18/2012 at 11:31
Wow, that's a tough one. I can think of various solvents to try (such as MEK...Methyl Ethyl Ketone) , but have NO idea how they may affect the glass or coatings. I guess I'd contact the manufacturer of the microscope for their advice. What a shame to have to deal with that mess. Good luck. Whatever
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supertool73 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote supertool73 Quote  Post ReplyReply Direct Link To This Post Posted: March/18/2012 at 11:55
It looks like what ever they sprayed on to it ate into the coatings to me.
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Bitterroot Bulls View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bitterroot Bulls Quote  Post ReplyReply Direct Link To This Post Posted: March/18/2012 at 12:36
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Horsemany View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Horsemany Quote  Post ReplyReply Direct Link To This Post Posted: March/19/2012 at 12:53
Plastic lens deteriorated by something caustic mebbe?  Definately looks like it's toast.
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jonoMT View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jonoMT Quote  Post ReplyReply Direct Link To This Post Posted: March/19/2012 at 17:22
If acetone won't clean it, anything that might will probably etch the glass/coatings. Any idea what the substance was?
Reaction time is a factor...
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stickbow46 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote stickbow46 Quote  Post ReplyReply Direct Link To This Post Posted: March/19/2012 at 17:31
The guy who would probably know is Ilya,maybe he'll chime in!
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