Posted By:
Rich JacobsJay: Here's what they say
"60 EX 5: 80/20 or better centering, minor rounding or fuzzing of corners, roughness or chipping along edge (no layering), one VERY slight surface or "spider" crease may exist on one side of the card, gloss may be lost from surface with some scratching that does not detract from the aesthetics of the card."
But:
"CENTERING: Tolerances are allowed for centering but must be within 5% of the standard and should not detract from the overall eye-appeal of the card. Back centering is less critical than front centering and a tolerance of up to 10% in excess of the front standard is allowed."
I guess that means 85/15 is acceptable for a SGC 60.