Thanks for the advice above. Took a while, but this weekend I got this into a frame. I'm sure I've done it neither the best, nor the most efficient way, so grateful for any comment on the approach taken below.
I found a supplier of pre-made float frames:
http://www.ezeframe.co.uk/Item/611167000 (any other UK suppliers that offer this service at a similar price point?)
They said that they make the frames "a few mm larger" than that which you specify. I guessed that "a few" would likely be around 3mm, so wanting a 5mm 'border' provided the exact measurements of the board plus 10mm. This worked out about OK, but would have looked fine a few mm bigger as well, imo.
I bought a strip of 10.5mm x 25mm wood, cut it to a few mm shorter than the paintings length and wood glued it, inset 3mm along both long edges of the painting. I had the painting laid face down on a couple of tea towels. To apply pressure I put a chopping board over both of the strips and stacked a few big hardbacks on top. I was worried about applying too much pressure and damaging the oil paint - a valid concern?
Checking how far the wood strip overlapped with the lip of the float frame, I drilled a 2mm pilot hole in the float frame. I put the painting in the frame and centered it by adding even amounts of playing cards along each of the four sides. The profile of the float frame lip was 12mm, then 10mm for the wood strip glued to the painting, so I went for 18mm long, 3.5mm diamater self tapping screws.
I completely mis-positioned one of my pilot holes, and had to redrill it. If I was doing it again, I'd obviously measure better, but might also use a thinner screw and/or drill pilot holes into the wood strips as well as the frame. Was a bit worried they might split.
Overall quite enjoyed the process and content with the result. Hopefully it doesn't fall out...
- 2017-02-13 21.23.41.jpg (751.03 KiB) Viewed 2322 times
- 20170213_204356.jpg (1.5 MiB) Viewed 2322 times
