1951 Bowman Mantle PSA 7(OC) on PWCC tonight

[Goudey77]

This is all crazy talk and half of you all sound like paranoid geeks
Cardboard could've shrunk through moisture and aging throughout the years.
All the more reason to stop caring about the grade and go for what appeals to your eye.

This hobby should be fun. Not analyzing every fiber and print dot.

[Fuddjcal]

Originally Posted by Goudey77

This is all crazy talk and half of you all sound like paranoid geeks
Cardboard could've shrunk through moisture and aging throughout the years.
All the more reason to stop caring about the grade and go for what appeals to your eye.

This hobby should be fun. Not analyzing every fiber and print dot.

Thaaaaaaaat's right...... Shrunk due to moisture You win for knee slapper of the day. THEY ARE ALL TRIMMED. maybe you didn't get the memo it's a billion dollar fraud.

[perezfan]

Originally Posted by Goudey77

This is all crazy talk and half of you all sound like paranoid geeks
Cardboard could've shrunk through moisture and aging throughout the years.
All the more reason to stop caring about the grade and go for what appeals to your eye.

This hobby should be fun. Not analyzing every fiber and print dot.

Steve and Joe could not have said it better….

Sounds like a promising contender for PSA's new Ad Campaign.

[aloondilana]

The card is an old cert and has nothing to do with Brent other than he accepted it as a consignment.

[darwinbulldog]

I think it originally came back as a PSA 7, then it was cracked, trimmed, and resubmitted to get the rarer PSA 7(OC) grade.

[Goudey77]

I heard that the old slabs had some issues with their seals. So if you lived in a humid climate the cards could shrink up to %5
If you study paper fibers used in the 1950's you'd understand the risks involved with post war era cardboard.

[steve B]

Originally Posted by Goudey77

I heard that the old slabs had some issues with their seals. So if you lived in a humid climate the cards could shrink up to %5
If you study paper fibers used in the 1950's you'd understand the risks involved with post war era cardboard.

So all the cards that measure full size were oversize when they were made?

Also- That card is most likely more than 5% small both ways.

The fibers are mostly wood pulp, maybe with some rag content and additives like clay, plus some seizing. Except in the cards that are multiple layers, where the white front surface is either bleached wood fiber, or may have a high rag content, linen, cotton, maybe some silk or wool Plus some seizing.

What are todays cards made of?
The exact same stuff, except that the white paper/cardstock is now the entire card since 1992 for Topps, and earlier for the other companies.
30's cards?
Guess what?
yeah, the same stuff.

Paper shrinkage generally happens soon after the printing process. And it's less normal on things produced by offset lithography.
Stamps which are intaglio printed do have shrinkage immediately after printing under some conditions, which is why the BEP used experimental papers in the 1920's as well as different spacing on some sheets a bit earlier. Then changed to a "dry" printing process in the 50's. (The sheets are printed "wet" to help the paper get forced into the recesses in an engraved plate and then to retain ink. The edges shrunk faster than the center making the spacing and thus perforations uneven. With more force, less wetting was needed. )

[Goudey77]

Steve B, Glad that my sarcasm resulted in some real world information. Thanks for the knowledge drop.

Not so kidding aside does extreme fluctuations in humidity/drying in the air potentially cause warping and or shrinkage in typical card stock?

Let's say even a good old soak job?

Originally Posted by steve B

So all the cards that measure full size were oversize when they were made?

Also- That card is most likely more than 5% small both ways.

The fibers are mostly wood pulp, maybe with some rag content and additives like clay, plus some seizing. Except in the cards that are multiple layers, where the white front surface is either bleached wood fiber, or may have a high rag content, linen, cotton, maybe some silk or wool Plus some seizing.

What are todays cards made of?
The exact same stuff, except that the white paper/cardstock is now the entire card since 1992 for Topps, and earlier for the other companies.
30's cards?
Guess what?
yeah, the same stuff.

Paper shrinkage generally happens soon after the printing process. And it's less normal on things produced by offset lithography.
Stamps which are intaglio printed do have shrinkage immediately after printing under some conditions, which is why the BEP used experimental papers in the 1920's as well as different spacing on some sheets a bit earlier. Then changed to a "dry" printing process in the 50's. (The sheets are printed "wet" to help the paper get forced into the recesses in an engraved plate and then to retain ink. The edges shrunk faster than the center making the spacing and thus perforations uneven. With more force, less wetting was needed. )