RE: Lozenge
Having to to deal with the lozenge has certainly put me off thinking about certain projects! From what I can understand of the German on that site, we're talking about water-slide decals ("nassschiebe-decal" ). The pattern repeats so that multiple decales could be laid down next to each other. This is an interesting idea but would have to be clear-coated.
I've always liked the idea of trying to produce this printed pattern using the Japanese woodblock technique where you'd have a set of registered printing blocks, one for each color. There would probably be some incidental color overlapping but this is exactly what you get on the original. But this would have to be done before covering of course so there's the question of what kind of fabric and what kind of ink.
Another idea inspired by my travels is to use the "batik" process where fabric is selectively coated with wax and then dyed. Then the fabric is boiled to remove the wax, a new pattern of wax is applied (for example covering the first color) and then the fabric is dyed again. I'm see some pretty amazing batik works of art.