If you got started collecting in the 1980’s you might have kept some of your prized sports cards encased in what is commonly known as a screw-down holder.
When protecting your cards starting becoming paramount in the ’80s the screw-down holder was viewed as the premier way to encase your card. What better way to keep your card safe than holding it together with a big, gigantic piece of plastic held together with four tight screws.
Although it used to be the preferred way of protecting valuable cards, screw down holders can cause significant damage to sports cards. The pressure applied from the tightening of the screws can flatten out the card over time.
This can make it appear as if the card has been altered, and the grading companies will often reject cards stored in screwdown holders, returning them as ‘Altered’.Read More...