[KChiefs1]

Originally Posted by tatorhog

For a wax pack, they look at the seal on the back, the tightness of the wrapper itself, etc...I don't know all the criteria that goes into it, but its just an evaluation of the condition of the pack of cards itself.

From the psa site itself
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PSA authenticates both wax and cello packs but does not authenticate Tallboy or Rack Packs.
A series of PSA graders review your packs for authenticity and seal. If genuine and unopened, PSA looks for evidence of resealing, repairing and alterations.
If your packs pass these two steps, PSA grades the condition of each pack on a scale of 1-10, with 10 being best. Wear to corners and edges of the wrapper, or staining and toning of the wrapper, will contribute to the grade.
After grading, PSA encapsulates each pack in its own extra thick, tamper-evident case. A label within the case displays the pack's pertinent information and unique certification number.

WOW.

Thanks for finding this.