How do you actually determine centering ratios?

[Jewish-collector]

Someone put a nice informational document on the PSA message board:

https://forums.collectors.com/messag...hreadid=897961

[drcy]

What is centered and why does a card have to be centered. Were T206s or Old Judges intended to be issued perfectly centered.

Is 'perfect centering' just a later day fiction, like 'rookie cards.' Is it nothing more than a cognitive bias.

In one of his old books, Mr. Mint said a mint card was in the condition it came out of a pack. Pack fresh. So a mint card could be badly off centered. An interesting concept.

[Fred]

If the grading companies took the time it would be fairly easy to get the centering down to a gnats ass by using a high resolution scan and then using a software program to determine the ratios of the much larger area available for measurement - but hey, what do you expect for 10 bucks (or what ever they happen to be charging to grade a card)?

[toledo_mudhen]

So I am one those "centering freaks" and the process I use is to do a hi res scan of the card and then I open up the scan in Picassa so I can rotate left - right etc.

Then I use my trusty JRuler which allows me to determine the number of pixels of white space on each border S/S & T/B

From there it's just divide the number of pixels on one side by the total number of pixels on both sides to get a percentage.

JRuler is a free tool that can be found at :

http://www.spadixbd.com/freetools/jruler.htm

hope this helps..............

[Rookiemonster]

Very carefully.......

[Buythatcard]

Originally Posted by Jewish-collector

Someone put a nice informational document on the PSA message board:

https://forums.collectors.com/messag...hreadid=897961

I find all you responses very interesting but really loved the link that was sent by Jewish-collector.

Thanks to all.

[iwantitiwinit]

Here's an easy rule of thumb:

if you're a seller its 60-40

if you're a buyer it 80-20

[Stampsfan]

Originally Posted by iwantitiwinit

Here's an easy rule of thumb:

if you're a seller its 60-40

if you're a buyer it 80-20

Love it!!!

[conor912]

Originally Posted by Jewish-collector

Someone put a nice informational document on the PSA message board:

https://forums.collectors.com/messag...hreadid=897961

The back of a PSA 10 only has to be 75/25 or better?!

[ullmandds]

Originally Posted by conor912

The back of a PSA 10 only has to be 75/25 or better?!

that's lame...what kind of gem mint 10 has any defects whatsoever?

[conor912]

Originally Posted by ullmandds

that's lame...what kind of gem mint 10 has any defects whatsoever?

....and it only needs "55/45 to 60/40 or better" front centering. Card grading is so laughable. With a gem mint grade requiring less than perfect centering, it's just a matter of time before we see an 11.