Origami Republika is a world-wide collective based in Norway, releasing music under almost any genre, as well as artwork and written works. Membership is by application, and every member has a number. Many of the artists under this collective banner produce under names starting with "Origami".Here their official webpage.Those two tapes were released in the beginning of the 90s by the amazing Biotope Art Organization,tape-label born in Southern Italy and then relocated in UK.
Here the discogs page with info about Blatt Rom tape and here the one about Retro demo.
Enjoy those magnificent tape-works.