Does acidity from fingerprints eat toning?

Goober

I ask because I have a toned Morgan, that on the reverse, has a small portion of a finger print in the toning, and I've seen other toned Morgans with similar features. Makes me wonder, that when a coin is slabbed, or just prior to slabbing, if a finger slightly touches the surface where the coin is toned, with the acidity etch a print in the toning?

poorguy

What I am guessing is that the fingerprint is on the coin before the toning starts and the small amounts of oil on the fingers and hands stays on the coin and "protects" or covers the surface where the oil is on the coin therefore causing it to not tone.

numobri

I think a finger print would prevent toning.

mr1931S

"What I am guessing is that the fingerprint is on the coin before the toning starts and the small amounts of oil on the fingers and hands stays on the coin and "protects" or covers the surface where the oil is on the coin therefore causing it to not tone."

Good guess.

TUMUSS

with them.

Kind of the chicken-egg story...hehe

magikbilly

I suspect it might work both ways (with storage conditions a variable), but MrSpud is the one to ask IMHO.

Billy

nwcs

Don't you mean swirling textile toning?