[rollei_list] Re: cleaning old Rolleinars and filters

  • From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
  • To: <rollei_list@xxxxxxxxxxxxx>
  • Date: Sun, 22 Jan 2006 15:52:25 -0800


----- Original Message ----- From: "keith_w" <keith_w@xxxxxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Sunday, January 22, 2006 11:02 AM
Subject: [rollei_list] Re: cleaning old Rolleinars and filters


Don Williams wrote:

At 10:59 AM 1/20/2006 -0800, Dick Burk wrote:

Dry Isopropyl alcohol is also effective for some types of oil films and is safe. Isopropyl rubbing alcohol has too much water in it. The residual water may creep into the mounting. 99% Isopropyl is available at many drugstores, its not expensive.


Interesting you should mention "rubbing alcohol". For years I had been buying those special eyeglass cleaning pads. One day I just dabbed a bit of soft paper towel with the stuff, wet my eyeglasses thoroughly (wiping a bit) and then dried them with the other end of the paper towel. Best cleaning job ever, and the paper towel can be used several times, using different corners.

I've read more than once that using paper towels for cleaning anything meant to be optically clear is a big no-no!
Apparently the process of the manufacturing of consumer paper towels uses all manner of wood fibre products, many of which have very small particles of what amounts to common sand in them.
Nothing the processing does will eliminate those abrasive particles.
Over time, the use of paper towels will lead to a microscopic hazing effect.
Whether YOU can personally see it is moot. The fact that it exists, and I could have done something to avoid it, is a reasonable goal. If you know about it and ignore it, your choice...

keith whaley

Kimberley-Clarke is reported to use a magnetic scavanger on the pulp it makes Kleenex and toilet tissue from. Some toilet tissue contains perfumes and oils (to make it more pleasant to use) so shouldn't be used for cleaning lenses. Kimwipes, also a Kimberly-Clarke product, are made for cleaning delicate items and are quite satisfactory for optical use. They are free of abrasive particles.
Kodak Lens Cleaning Tissue is, of course, satisfactory, but it tends to disintegrate when wet. It works very well for making one-use brushes. The tissue is rolled up, torn in half, the halves folded together and used _once_ only for brushing. Kimwipes can be used in the same way but don't feather as nicely as the Kodak tissue does.
The best advice for lenses is to protect them as much as possible to minimize the need for cleaning.

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx 

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