Here's a fascinating little video from the olden days showing how posh wallpaper was made in the 1960s. I'm betting that if you're prepared to spend a bob or two on an artisan produced roll today the processes that you see here won't have changed very much.
And have you ever wondered how flock wallpaper, the standard decor in a '70s Indian restaurant or old fashioned French hotel was made. Of course you have! Well here's a video that will well and truly sate your curiosity. It's just like fluffy glitter. I bet you'll all be wanting a flocking tank of your own!