Question Author
Thanks for the very interesting replies. I wonder though, as asked to my original post, is there someone you could approach for permission (and probably have to pay a fee) to use these characters?
With reference to Ethel's post, I contacted Viacom, who directed me to a London company, who in turn couldn't give me much information, except to ring Warner Bros in America, and gave me the American number to call. I haven't rung it, because it really was just a thought, a hobby if you like, and I expect I would be lucky to retrieve my costs from the sale of the cards. I imagine you are looking at megabucks to buy the right to reproduce the image, and little old me is just a lowly housewife who enjoys crafting.
Jules001, do you sell on ebay? Is it worth your while? I mean, do you manage to recoup your costs? I noticed someone on ebay selling "not Betty Boop" cards, with an image that looks very similar to BB, but not actually her. Wonder if that's allowed?
With regard to pinching the idea from its owners, to be quite honest I wouldn't actually lose much sleep over pinching a few pennies from Warner Bros. (BB's creator is dead). On the scale that I would be involved, it would be like pinching a spoonful of water out of an ocean! (If you know what I mean). And before you answer - yes, I know, a criminal offence is a criminal offence! Shame on me!