Mega Feeder Finger Scrape OR Planchet Issue OR??

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CascadeChris
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Mega Feeder Finger Scrape OR Planchet Issue OR??

Post by CascadeChris » Sat Apr 06, 2019 3:27 am

Whats going on here guys? The areas are shiny and polished like a FF scrape but it's just so massive...

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messydesk
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Re: Mega Feeder Finger Scrape OR Planchet Issue OR??

Post by messydesk » Sat Apr 06, 2019 4:51 am

Not a feed finger scrape. It goes right through the devices. It's in the planchet.
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CascadeChris
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Re: Mega Feeder Finger Scrape OR Planchet Issue OR??

Post by CascadeChris » Sat Apr 06, 2019 3:23 pm

messydesk wrote:
Sat Apr 06, 2019 4:51 am
Not a feed finger scrape. It goes right through the devices. It's in the planchet.
True but it looks so much like one, with how "shiny" the streaks are. Doesn't look like an improper mix, at least it doesn't present like any I've seen. Perhaps a planchet wash/rinse issue? She's an 85o in a PC 62 holder
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raynat3
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Re: Mega Feeder Finger Scrape OR Planchet Issue OR??

Post by raynat3 » Sat Apr 06, 2019 3:35 pm

Would it be most likely impurities in the planchet metal, something having to do with rollers or something having to do with the bath for planchets?

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CascadeChris
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Re: Mega Feeder Finger Scrape OR Planchet Issue OR??

Post by CascadeChris » Sat Apr 06, 2019 5:02 pm

raynat3 wrote:
Sat Apr 06, 2019 3:35 pm
Would it be most likely impurities in the planchet metal, something having to do with rollers or something having to do with the bath for planchets?
I'm not sure, I haven't seen anything present quite like it before. It's only on the reverse which would limit but not eliminate the probability of metal impurities or wash/rinse.. However, I think you might be on to something with a roller issue 🤔 Haven't attributed her yet either. Here are some better pics...

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UncleGildy
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Re: Mega Feeder Finger Scrape OR Planchet Issue OR??

Post by UncleGildy » Sat Apr 06, 2019 6:07 pm

On the first page CH3 of "the big book" I learned that they didn't have rollers which could achieve the precise thickness until 1901. After rollers, the final transforming from ingot to strip was achieved with a draw bench (pair of parallel flat dies). The draw bench dies (blades?) were could develop rough surfaces that resulted in planchet striations when the coin was not fully struck (and some times appearing or referred to as planchet grain). Here's an example that illustrates striations from not fully stuck on OBV & REV as well as planchet grain on REV 1885CC v2B.

The book says it's "common on 1878's and early CC coins", but 85O seems like a reasonable possibility.

The striations mentioned in the book appear as scratches or scrapes from the coin not being fully struck (metal not flowing all the way into every device). I suspect the grain on the back of the coin above is more of something to do with the metal composition at the very surface due to the striations. Related I'm sure, as it's in the same direction. In the grain area, it seems fully struck (no scratches), but not really polished -- looks dirty/tarnished, but the surface is not smooth/polished there. Check for yourself in the image at the link above.

imho it looks more like feed finger polishing effect due to die scrape/scuff than planchet grain. Looks cool either way :)

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vampicker
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Re: Mega Feeder Finger Scrape OR Planchet Issue OR??

Post by vampicker » Sun Apr 07, 2019 12:47 am

Are we sure that's not just a post strike kinda uggo surface?
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CascadeChris
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Re: Mega Feeder Finger Scrape OR Planchet Issue OR??

Post by CascadeChris » Sun Apr 07, 2019 1:59 am

vampicker wrote:
Sun Apr 07, 2019 12:47 am
Are we sure that's not just a post strike kinda uggo surface?
I dont think so. The shiny areas go right up to the edge of the devices where they cross with no gap at all. Sure looks "as struck" under a loupe. Pics suck. A video would probably show whatever it is much better.
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vampicker
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Re: Mega Feeder Finger Scrape OR Planchet Issue OR??

Post by vampicker » Sun Apr 07, 2019 3:27 am

Yeah, it's not the shiny area that looks off to me. Maybe it's just the picture,
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