I got this creased card as part of a lot to fill out my binder collection. I don’t mind having low-grade cards in my binders since they’re mostly base commons, but I’d like to reduce the appearance of this crease.

Since this is a bigger crease across the full width of the card, first I’m going to press the card between two sheets of parchment paper (moistened with 10% isopropyl alcohol) in a card press (two pieces of foam and acrylic plates), then remove the moisture and let it dry in the press. The goal here is to introduce slightly more moisture so the cardstock expands enough to correct the crease, then let it dry flat. Depending on how it looks in a few hours, I may work the crease a bone tool before letting it dry in the press.

I bought this 2018 Allen & Ginter Shohei Ohtani rookie last year for a discount because it had a couple dents along its edges. A year later, I finally got around to fixing it. Basically, you put the card in a humidor for a few hours at 80% humidity, let it dry for 8 hours under gentle pressure, then repeat the process a few times until the dent goes away. You can use a bone tool to gently smooth things out and work the cardboard, but the goal is to let the cardboard repair itself naturally as it expands and contracts with the introduction/removal of humidity. You can also put a tiny bit 10% isopropyl alcohol/90% distilled water on the dent with a Q-tip, but you have to be super careful to not use too much and immediately dry the card under light pressure.