matte vs. glossy
- I've posted in the "die caps" album a picture
from one of catch-a-coin's auctions. It is a
not-quite-centered reverse cap. The first strike was normal while
the second was out-of-collar beneath a blank planchet
that wasn't quite perfectly centered over the coin
below.<br><br>Among most recent reverse caps (and all older reverse
caps), the obverse has a matte texture. However, in
about 10-15% of recent reverse caps you see a glossy,
reflective surface. That's what we see in this coin. The
primary image also tends to be less clear in these
"glossy caps".<br><br>I have no idea why these glossy
surfaces should develop. I've also noticed the existance
of matte and glossy subtypes in partial brockages
and indents.<br><br>It's a mystery that has me
completely stumped. Anyone out there have a solution?
- It's not often that I address a post this old (8/24/2001). However,
I did get to see once again the 1962 cent that I thought had four
sets of raised, parallel profiles of Lincoln. My initial impression
based on a brief examination at a coin show was wrong. It actually
had four sets of INCUSE images. It was a shifted cap strike. The
coin had been struck through a die cap that had experienced three
previous shift-and-strike events.
So now I'm back to two sets of expansion ripples as the maximum I've
yet come across. I still don't have an explanation that I'm
comfortable with, though.
--- In email@example.com, dermestid wrote:
> You'll find in the "oddball errors" album an
> image of 10c capped die strike with one set of
> "expansion ripples" extending out from the head of
> Roosevelt. Expansion ripples are a set of vague raised
> outlines that parallel large central design elements such
> as busts and buildings. I have one other example in
> my collection -- a nickel.<br><br>I wrote a short
> article on this phenomenon some time back in Errorscope.
> In that article I presented I plausible theory to
> explain this phenomenon. At least it was plausible at the
> time. There's no need to go into the details, except to
> say that this theory can, at best, explain the
> existance of two sets of nested expansion
> ripples.<br><br>However, at a coin show in Chicago about a year
ago, I saw
> a Lincoln cent from the early '60s that showed FOUR
> sets of expansion ripples extending out from the front
> of Lincoln's bust. They became progressively fainter
> the farther out from the bust you went.
> Unfortunately, the owner wouldn't sell it at even $125. Maybe I
> should have offered more.<br><br>Has anyone out there
> seen multiple expansion ripples like this?