A 'rose' is a plaster or wooden moulding which serves a decorative and practical purpose. They are most often found in conjuction with #lighting; and the base of a ceiling mounted pendant #light, is called a rose.
The practical purpose of the #rose is to conceal the #wiring for the light. A decorative rose can be placed behind the light for this reason also. In addition they provide a solid #mounting surface, if the background is unstable.
I was called to mount some replacement wall lights, and upon removing the old lights, the wall was crumbling, and the wiring messy. The new lights couldn't be fitted because of the mass of wiring, and the chalk-like, crumbling, wall density.
Here we can see the old light, and the wall behind it. The mass of cables had been concealed in the old rose. Therefore I recommended that the customer have some new roses made that matched the new lights. I volunteered to make them.
I have cut circles many times, using a #jigsaw, and using a #router, for a number of applications. However, this needed to be quick and economical. So I started thinking, and even though it hurt, I found the solution. I remembered that my Bosch palm router had a detachable edge guide. This guide could be further dismantled leaving only a rail sticking out. Then I could put a screw through it into the work peice, providing a centre pivot for the circle cut. However, this wouldn't prevent the router from wandering in and out, providing an uneven circumference. I mulled over this but it hurt too much. I thought of gluing a mending plate to the position of the pivot, but to my delight my eye lighted upon a washer just laying about in my unit. Wow, perfect.
Now I had a working jig that can cut any size radius on the length of the rail. After one test cut the washer started to move so I glued it back with plenty more hot glue. I traced out each rose using the router cutting just micro-millimetres. After roughly sawing away excess from the circumference, I set the router in place again and performed the final cuts.
Next day I took them to the job and finished the install. The width of the rose enabled me to cover the choc-blox, and get a good fixing to more stable parts of the wall.