Looking for corrosion, I really couldn't find any.
These were recently lubed and have similar depth lube grooves to show color.
There is a slight yellowing of my SL68B in the lube groove. Oxidation/aging of the lube
to the air? and hopefully not the alloy.
These 316299's were lubed in January. most of the 50 I have stored didn't have the
dark ring along the bottom edges of the lube grooves. and most pronounced by the GC.
at first I thought this could be corrosion staining, but after looking at the enlarged
digital photo and seeing a ring in each lube groove, I am confident these were cycled
more than once in the lube sizer, to completely fill the lube grooves of the boolits that
didn't get fully filled with the first cycle...I do that. I suspect the dark staining is
alloy particles.
316299 PB ...also lubed January 2015
In case I am wrong about the above theory of alloy particles staining the lube and
it's a case of reacting with the copper and/or alloy...that should show on these
in 6 months or so.
These TL style 41 Ranch Dog's recently Lubed have a slight greenish hue. That
could be from the Sage brand Alum GC made from used 0.010" Lithograph plate with
coating on the outside...It was the only combination of many GC's sample Sage made
for me, that worked with this boolit. No standard Commercial GC worked.
Here is a Ideal #1 with a brass reservoir, it has had SL68 in it since January, no visible verdigris or other corrosion.
A few years ago, I had a bear grease/beeswax lube in this sizer, I never gave verdigris a thought,
well, at about the one year mark, I went to refill it, and it had developed vertigris, serverely around
the brass sleeve of the pressure nut.
These were lubed in January, this batch show the yellowing more than other boolits.