A painting usually has a single owner for a certain period of time. And since they own that painting, they can do anything they want with it, including having a print shop photograph it and copy the image onto any material they so choose, without your permission- copyrighted or not,--- unless of course, your contract for the sale of the painting involves verbiage that precludes such action without your permission.
Friends,After penning this reply to Annie and while sitting outside in our screened-in porch, smoking a cigarette and drinking my second cup of coffee, I suddenly came to the abrupt thought that many of you might not have the slightest idea what your legal rights may involve before and after you sell a painting while commissioned, from a gallery, or at an art fair?