Posted By:
Jodi BirkholmDavid,
I know less on this subject than you, but I can tell you that your rule doesn't always apply to O-Pee-Chee packs. Growing up in London, ON (the home of that now-defunct company), I remember buying many a wax pack coming straight out of the box that exhibited strange, unique characteristics in the flap folds. Sometimes the seal was loose on a pack purchased at a corner store. I speculate that this was due to worn out equipment (which also explains why many OPC cards were cut so jagged--they used a heated wire process to cut the sheets while they were still wet/moist, hence the sloppy-looking product. This process seemed to change after 1989.). Another interesting aspect with 1980's-90's OPC issues was the lack of wax stains; I don't think that the pressure used to seal the Canadian packs was anywhere near as great as that employed by OPC's American sister company.