Punched cards - which paper/cardboard?

Hi William, On 13.11.2010 00:01, William Donzelli wrote: Oh... I did look around in the web. Found machines that print and fold and cut and even can make coffee for you. I once found an old patent describing a little mechanical desktop machine that folds paper tape. Just the thing I'd love to have... But building that kind of machine is beyond my mechanical skills. I still have another idea for a folder. I'll try it when I find the time to do so. There seems to be one major problem with the usual fanfolding systems: They perforate! If you perforate the paper web it's easy. That's done for computer paper and forms. I did not find any reference to endless folding machines that would do the job - except the patent mentioned. My post was about punched cards. Next week I'll send out some enquiries to some paper companies around my part of the world. The most interesting question is if there is reasonable need/interest for nicely printed punch cards througout the vintage computing/computer museum community. I'd want to run them through a letterpress. I'd need to do a run of at least 150000 cards. That's about the minimum amount of paper to buy for a reasonable price. Kind regards, Philipp -- http://www.hachti.de