Archived posting to the Leica Users Group, 2002/03/04

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Subject: [Leica] Removing Lens Coating
From: leicas@mindspring.com
Date: Mon, 04 Mar 2002 11:17:28 -0500

>As a practicing dentist for the past 25 years, I can tell you that 
>toothpaste not only will remove just about any lens coating, but will also 
>remove a fair amount of the lens element itself. You'll have a cloudy lens 
>in no time! Toothpaste contains varying amounts of pumice and is very 
>abrasive. I've seen patients over the years who are so aggressive with a 
>toothbrush and toothpaste that they have removed tremendous amounts of 
>tooth enamel such that the tooth has snapped in half due to 
>toothpaste-induced erosion. Tooth enamel is far harder than any lens I've 
>ever seen. As an aside, toothpaste can remove scratches in your car's 
>paint or clearcoat quite nicely if used in small amounts on a wet rag.

Peter W. Klein DDS
Melbourne, FL


> > In a message dated 3/3/02 4:40:46 AM Eastern Standard Time,
> > Dr.Alexander.Kraus@gmx.de writes:
> >
> > >  I had good success removing older coatings with toothpaste in the
> > >  past. You have to rub a little bit until it comes off, but it doesn't
> > seem
> > > to harm the glass.
> >
> > I wonder. Most toothpastes contain pumice. That's a grinder/polisher. I
> > guess
> > I'm pretty certain it will remove coatings; I wonder if it won't also
> > remove
> > glass, i.e. act like a fine polishing agent.
> >
> > Seth        LaK 9

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Replies: Reply from Dr.Alexander.Kraus@gmx.de (Re: [Leica] Removing Lens Coating)