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Speed Graphics - techniques to remove verdigris ?
Old 1 Week Ago   #1
Luddite Frank
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Speed Graphics - techniques to remove verdigris ?

Zeiss cameras may get "bumpy", but they got nothing on Graphic Press cameras for growing heavy, gunky verdigris around any & all brass fittings (essentially every bit of hardware on the camera).

What techniques are favored for removing the green gunk w/o harming leatherette, plating, or paint?

Been working for a couple evenings now on a 1937-ish pre-Anniversary 4x5, removing crud...
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Old 1 Week Ago   #2
Crazy Fedya
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Try vinegar on q-tip. I had a lot of success with it.
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Old 1 Week Ago   #3
Mr_Flibble
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Alcohol will dissolve verdigris as well.

Toilet duck works a treat too...but it's rather to aggressive for the other materials on the camera.
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Old 1 Week Ago   #4
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Quote:
Originally Posted by Crazy Fedya View Post
Try vinegar on q-tip. I had a lot of success with it.
Agreed. I tend to dilute it 1:1 though (at least to start). It's also good for freshening up engraved markings on bodies and lenses.
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Old 1 Week Ago   #5
Dan Daniel
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After cleaning it off, any suggestions for sealing the screws or rivets to prevent bumps in the future? I've applied thinned clear nail polish at times but maybe I am just wasting my time.
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Old 1 Week Ago   #6
Crazy Fedya
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Quote:
Originally Posted by michaelwj View Post
Agreed. I tend to dilute it 1:1 though (at least to start). It's also good for freshening up engraved markings on bodies and lenses.
European vinegar has 10 percent concentration, and 5 percent in the US. I use whichever one is under the sink.
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Old 1 Week Ago   #7
Crazy Fedya
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Quote:
Originally Posted by Dan Daniel View Post
After cleaning it off, any suggestions for sealing the screws or rivets to prevent bumps in the future? I've applied thinned clear nail polish at times but maybe I am just wasting my time.
I never sealed any screws, but you can try clear coat nail polish. My wife has is , I used it several times to lock rangefinders, or to stop soft release from unscrewing.
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Old 1 Week Ago   #8
Dwig
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Quote:
Originally Posted by Luddite Frank View Post
...
What techniques are favored for removing the green gunk w/o harming leatherette, plating, or paint ?
...
Wherever possible, remove the metal parts for cleaning. Don't attempt to clean them while they are installed on the camera.
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Old 1 Week Ago   #9
Luddite Frank
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Thanks for the replies.

Yes, will remove hardware when / wherever possible.

In the case of Graphic Press Cameras, quite a few of the offending fittings are mounted on the body over-top of the leatherette, and the verdigris becomes impressed into the texture of the Leatherette.

After carefully scraping-away the build-up, one is left with the green mung still filling the texture of the leather.

So, hopefully the vinegar would remove that build-up w/o harming the covering.

Has anyone tried ammonia on a Q-tip ?
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Old 1 Week Ago   #10
retinax
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Is the covering real leather? I've been told by someone who works with leather that vinegar is actually good for leather. I suspect I actually depends on how the leather has been treated, but I wouldn't worry too much. If that is true, I'd be more skeptical about ammonia or anything pH>7.
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Old 1 Week Ago   #11
Luddite Frank
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Yes, real leather, or at least constituted from real leather.

I imagine the chemicals used in the tanning process are what are reacting with the brass to create the verdigris in the first place.


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