Whether you need to test some cut designs, or just want to play, cardboard is a great, inexpensive medium. With all of the Proofgrade-materials shipping boxes you’re likely receiving, you might have plenty sitting around, but if you want extra cardboard sheets, Amazon has some great options.
I like the 12”x18” sheets but there are many sizes available, and shipping is free if you’re a Prime member.
I wonder if anyone has successfully gone to like a Target or Walmart and asked if they have a bin of boxes that can be raided? You gotta figure they have more than they can handle, I wonder if they instantly compact it or what? It’d be a mixed bag of quality and thicknesses, I’d guess, but might be a (practically speaking) limitless source.
There’s a custom box maker in Atlanta (and elsewhere, I think they were huge) that I bought from a while back, I wonder if they would sell sheet stock… let me see if I can figure out who they were…
Ah, Pratt Plus.
Turns out cheaper to go with that original Amazon link there too.