[rollei_list] Re: Cleaning Rolleinars
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Sat, 2 Jul 2011 23:30:09 -0700
----- Original Message -----
From: "Jim Brick" <jim@xxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Saturday, July 02, 2011 5:27 PM
Subject: [rollei_list] Re: Cleaning Rolleinars
I agree with you Marc.
Over the past 60 years, I have used everything from a shirt
tail + my breath, to that exotic NASA stuff that costs
$50/1oz. IT ALL WORKS! In my camera backpacks I currently
have either ClearSight or ROR. I have both and re-packaged
them for easier use (in non-leak bottles) in the field. I do
not know which one I have where. I use whatever is handy,
when necessary. And I usually use it with an Apple iKlear
Microfiber Chamois Cloth (
http://www.klearscreen.com/detail.aspx?ID=16 ). The cloth,
for me, is just super. I've been using it (them) for many
years. Breath plus the cloth is what I usually use and only
resort to the cleaner bottle stuff when forced to.
I use the above on my filters (polarizers, warming, split
ND, & ND) and lenses. This works on resin and glass filters
the same.
MHO from decades of doing it,
Jim
Jim Brick
Sunnyvale, CA
http://www.photomojo.org/vip.swf
I garuntee that if you continue re-using the same cloth
or tissue you will eventually scratch up a lens before you
know its happening.
FWIW, the MSDS for ROR is:
Ammonia 26degree
Sodium chloride
Isopropyl alcohol
Liquid soap
Distilled water
So much for being a magic formula.
The ammonia is probably ammonium hydroxide. I have no
idea of the purpose of the salt, perhaps as a buffer or to
produce ammonium chloride in solution. The liquid soap is
probably not one of the wetting agents discussed below
because they are not soaps. A soap is produced by reacting a
fat or oil with a metallic alkali such as sodium hydroxide
(lye). The nature of the soap depending on the kind of metal
in the base. Soaps are surfactants, the wetting agents
discussed below are detergents.
Kodak lens cleaner contains:
Ammonium carbonate and a cationic surfactant (wetting agent)
with a long name, I think its Triton-X 100
Windex Original contains:
Isopropyl alcohol, ethylene glycol, and a wetting agent
similar to Triton-X
One brand of "streak free" glass cleaner contains: Ispropyl
alcohol and ethylene glycol monobutyl ether AKA Butyl
cellosolve, a common wetting agent.
Another brand contains isopropanol and 2-Butoxyethanol a
surfactant found in many glass cleaners. It is another name
for butyl cellosolve
2-Butoxyethanol is described at:
http://en.wikipedia.org/wiki/2-Butoxyethanol
Triton-X 100 is described at:
http://en.wikipedia.org/wiki/Triton_X-100
Which lists most of the various names it goes under.
Almost all glass cleaners fall into two categories:
1, Cleaners containing ammonia, either as ammonium hydroxide
(most of them) or ammonium carbonate (Kodak cleaner).
2, Cleaners containing isopropyl alcohol and either butyl
celosolve or Triton-X 100
The latter are often labeled "streak free".
While ammonium hydroxide is quite caustic it is used in
such high dilution in glass cleaner that it probably has no
deleterious effect on either lenses or coatings. However,
Kodak chose the far less alkaline ammonium carbonate for use
in their cleaner. I have not seen figures on the pH of
"streak free" cleaners but its probably fairly neutral.
One could make a good streak free cleaner from distilled
water, rubbing alcohol, and Photo-Flo.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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