Okay, so I know how to make custom corrugated cardboard boxes. Well, that is, I know what companies to go to if I want someone else to do the job for me. But what about pressed cardboard, i.e. heat-pressed fusion of multiple sheets of paper into one thick piece of cardboard? Well, go searching around, the name proper is paperboard. So, here are some companies I’ve found that can do it. Doesn’t look as convenient as the case for corrugated, but yeah, it’s still doable.
20200927/DuckDuckGo pressed cardboard box printing
20200927/https://en.wikipedia.org/wiki/Cardboard
20200927/https://en.wikipedia.org/wiki/Paperboard
20200927/DuckDuckGo custom paperboard printing
20200927/https://www.sublimepackaging.com/paperboard-boxes.html
20200927/https://www.westrock.com/products/paperboard/customkote-paperboard
20200927/https://www.westrock.com/products/paperboard/printkote-paperboard
20200927/https://www.thepaperworker.com/custom-boxes/paperboard-boxes
20200927/DuckDuckGo custom acid-free cardboard boxes
20200927/https://www.universityproducts.com/conservation-materials/paper-film-and-board/acid-free-boxboard
20200927/https://www.universityproducts.com/perma-dur-black-white-barrier-board.html
UPDATE: Wow, I found this box-making company from a Digi-Key box certificate that looks like it’s one-size-fits-all… in terms of manufacturing capabilities. WestRock.
20200929/DuckDuckGo westrock corrugated fridley
20200929/https://www.westrock.com/
20200929/https://www.westrock.com/products/folding-cartons
20200929/https://www.westrock.com/products/paperboard/guardian-angle-corner-posts