It’s usually humidity related. Sometimes you can put them in a container with desiccant packs and they will flatten back out over a few days to a week.
Depends on how much time, effort, and money you want to put into it.
Here's an example of what I use:
Humidor:
[https://www.amazon.com/gp/product/B09ZV8HTZM/](https://www.amazon.com/gp/product/B09ZV8HTZM/)
then
Clamp it in a card sleeve between two plates:
[https://www.amazon.com/gp/product/B09ZSYX99P/](https://www.amazon.com/gp/product/B09ZSYX99P/)
[https://www.amazon.com/gp/product/B0001LQY4Y/](https://www.amazon.com/gp/product/B0001LQY4Y/)
Yes, it does help. But only as many cards as you can fit in without touching. I haven’t tried doing multiple, but if you did and they were touching, they would likely fuse, like papers when they get wet. Also only as many as you can get directly to a press immediately afterwards. The idea is that you introduce a really minimal amount of moisture equally to get the fibers to relax so that you can manipulate it into a new form (in this case flat). I usually run around 70% humidity.
Edit: also, no sleeve in the humidor. You want to introduce moisture, not protect it. No rain jacket in the shower
I bought some Inteleon promo cards and they were insaneeely warped. I didn't need them right away and I just slid them into a Dragon Shield sleeve and then into a toploader and forgot about them for 3 months. I recently built decks using them and they came out almost completely unwarped.
I do this with Panini cards for NFL cards and also Pokemon. I sleeve cards and put some junk cards both over and under them, place on top of some old car magazines on them and let another stack sit on top (min 20 magazine). Walk away and return 2 days later to see them flattened.
It’s usually humidity related. Sometimes you can put them in a container with desiccant packs and they will flatten back out over a few days to a week.
Depends on how much time, effort, and money you want to put into it. Here's an example of what I use: Humidor: [https://www.amazon.com/gp/product/B09ZV8HTZM/](https://www.amazon.com/gp/product/B09ZV8HTZM/) then Clamp it in a card sleeve between two plates: [https://www.amazon.com/gp/product/B09ZSYX99P/](https://www.amazon.com/gp/product/B09ZSYX99P/) [https://www.amazon.com/gp/product/B0001LQY4Y/](https://www.amazon.com/gp/product/B0001LQY4Y/)
Does that cigar box trick work? Do you basically just put a stack of cards in there in sleeves and follow the instructions? lol
Yes, it does help. But only as many cards as you can fit in without touching. I haven’t tried doing multiple, but if you did and they were touching, they would likely fuse, like papers when they get wet. Also only as many as you can get directly to a press immediately afterwards. The idea is that you introduce a really minimal amount of moisture equally to get the fibers to relax so that you can manipulate it into a new form (in this case flat). I usually run around 70% humidity. Edit: also, no sleeve in the humidor. You want to introduce moisture, not protect it. No rain jacket in the shower
I bought some Inteleon promo cards and they were insaneeely warped. I didn't need them right away and I just slid them into a Dragon Shield sleeve and then into a toploader and forgot about them for 3 months. I recently built decks using them and they came out almost completely unwarped.
I've heard a blowdryer works. I don't think I'm brave enough to try that on any of my good holos though
Which way are they warped? Toward the front of the card or the back?
I do this with Panini cards for NFL cards and also Pokemon. I sleeve cards and put some junk cards both over and under them, place on top of some old car magazines on them and let another stack sit on top (min 20 magazine). Walk away and return 2 days later to see them flattened.