[pure-silver] Re: Purosol Optical Lens Cleaning Fluid
- From: "BOB KISS" <bobkiss@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 27 Dec 2006 21:56:12 -0400
Any reason we can't use pure ethyl alcohol instead of isopropyl alcohol? I
can get the ethanol very easily.
HOLIDAY CHEERS!
BOB
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Richard Knoppow
Sent: Wednesday, December 27, 2006 6:49 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Purosol Optical Lens Cleaning Fluid
----- Original Message -----
From: "Bogdan Karasek" <bkarasek@xxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Wednesday, December 27, 2006 1:42 PM
Subject: [pure-silver] Re: Purosol Optical Lens Cleaning
Fluid
> HI,
>
>
> Edward C. Zimmermann wrote:
>> I'm under the impression that the Zeiss cleaner is just
>> pure alcohol
>> (Isopropanol)--- the same stuff that Ralph found Nikon to
>> be using.
>> I get my IPA from Kremer Pigments in Munich at a cost of
>> 4,25 EURO (plus
>> Tax) for a 1 litre can.
>> I don't use, however, just pure IPA but often dilute it
>> with (deionized
>> or "distilled") water and add a drop of wetting agent
>> (Agfa Agepon).
>
> What kind of dilution are you talking about?
>
>
> Cheers,
> Bogdan
>
Most of the commercially prepared lens cleaners are
either Ammonium carbonate diluted with distilled water or
Isopropanol. Perhaps a better cleaner is mixture of butyl
alcohol of the type sold as "streak free" window cleaner.
The standard solvents used in lens assembly are chemically
pure Acetone and pure Isopropanol. 99% Isopropanol
(Isopropyl alcohol) can be bought at some drugstores and as
a cleaner at computer parts houses, I've found it at Long's
Drugs and Fry's. Not expensive. Industrial grade Acetone
often leaves a residue. Acetone will attack many kinds of
paint and plastics so should be used as a last resort and
with great care. Ordinary window cleaner seems to leave
streaks. Most of it is Ammonium hydroxide. In theory at
least Ammonium Hydroxide can dissolve small amounts of glass
but I've never seen any indication that it can damage lenses
or coatings.
The proprietary cleaners on the market appear to be no
more than Alcohol.
Another point: I am very much against using anything on a
lens which is re-used. That includes microfiber cloth or
leather. The best material is something like Kimwipes. I
have confirmed with the manufacturer that they are free of
abrasive particles and it is lint free. Use each ONE TIME.
Kodak Lens Tissue is also good for making one-time-use
brushes. Kimwipes can also be used but the Kodak tissue
feathers better. The tissue is rolled up and torn in half,
the two torn ends are folded together and used as a brush.
Regular lens brushes may be soft enough not to do any damage
themselves but can pick up and hold grit which can scratch.
Any cleaner which leaves a residue will screw up lens
coating function. Please DO NOT use silicon treated tissues
meant for cleaning spectacle lenses. In fact, don't use them
on coated spectacles.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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