I would also advise being cautious with the "playfulness". The 1920s neoclassicism was characterized by simplicity and restrained elegance, and it was a reaction to the flamboyance of the turn of the century. People who know architecture will think it looks completely crazy if you choose a rosette with too much ornamentation for an apartment in a 1920s building. Aim for as close to the original as possible, I think!
A small clarification: my 1920s house was originally a small two-family house where my bedroom was the upper kitchen. I searched the entire market to find stucco similar to the existing ones for this room and could only conclude that these did not exist (about 15 years ago). It is possible that the supply is better today, but I agree with kalluns post: newly made are often too gaudy.
Renovator
· Stockholm
· 20 335 posts
Plaster ornaments that cpalm linked to have some simpler ones for example
http://www.gipsstuckaturer.se/butik/takrosetter-sv-sv-sv/r26-2/#!prettyPhoto
http://www.gipsstuckaturer.se/butik/takrosetter-sv-sv-sv/r26-2/#!prettyPhoto
20s and 20s. Everything from classicism to almost early functionalism can be right. In my house built in '25, the rosette looks like this along with simple ceiling moldings in a square profile. What do your other rooms look like?
If you want to shape freely, the traditional method is to shape a plug in any way you want, which is then cast in plaster. A modern variant might be to model one in SketchUp and send it for 3D printing in Styrofoam? There's a printing company in Hornstull, I believe. But probably more expensive than it's worth.
Renovator
· Stockholm
· 20 335 posts
Everyone looks like in post #10 but in slightly varying sizes, the one in the picture is the largest in the living room.