Sulphur inlay is a rare, near extinct, 18th century inlay technique. But it looked pretty easy, so I thought I'd give it a go.
I started with a small piece of mahogany, about 4" square. Then carved it (badly) with an oak leaf mon.
The sulphur is just plain yellow "flowers of sulphur" from a garden shop, or the retro-ironmongers in Staple Hill. Melted in a small tin can over the kitchen stove, it melts very easily. Then just pour it carelessly over the carving.
When cooled for a couple of minutes, scrape it flat with a cabinet scraper. Done !
Not bad. Needs a groove width of about 1/16" minimum. The groove should be square-sided, as narrow V-shaped grooves can fall out.
There are a few air bubbles in the sulphur, particularly down the middle of the wide grooves. I think having the workpiece right next to the stove might give me a quicker pour and runnier sulphur.
Surface when finished is hard and pale straw colour. Definitely needs a dark wood to show it up well.