Thanks for the suggestion.
I went out and bought a new card stock to test on. It's a lot thinner than my original sheet, has a grey pulpy middle and glossy white and top. Around 1.5 mm. The old sheet was around 3 mm and of a different type of stock.
I really like the thick stock. The tokens feel great and they are easy to grab and handle. But they turn out bad. I wasn't too happy with the thickness of the new stock when I found it in the shop but the tokens actually turn out to be okay. Did a few test "hits" and this is how they turned out together with the old tokens:
Thickness comparison. The "layers" in the old stock shows in this picture.
I use The Game Crafter for tokens. They're 1.25" wooden tokens in different colors and have printable stickers that go on them. Doesn't cost me much more than using my own printer ink and card stock. Saves me a lot of time.
Great idea. Unfortunately, shipping to Denmark seems fairly prohibitive. I haven't found cheap wooden tokens in a local shop. Yet.