Here is some great advice on soldering granules from @sophie.cunliffe.jeweller - "I love granulation detailing, I have used both fused and soldered techniques in my making. Fused granulation is wonderful however I find it can be restrictive for my designs and the cost of the higher carat gold or argentum that needs to be used in order to fuse well are the reasons I tend to use soldered granulation.
With soldering granulation I can build up layers of granules, and use both 9ct gold and sterling silver. In order to stop those tiny balls flying everywhere I apply a few at a time using a tiny amount of solder paste onto each of the granules and place them onto the frame. Apply a gentle heat over the piece and watch for the paste to dry out, this will then hold the granules in place until the solder flows, then slowly increase the heat watching for the solder to flow, quench, pickle, dry, then add a few more. The key is gentle heat and really watching for the solder to flow, over heating can cause the granules to melt. I solder all my pieces on charcoal which is an excellent soldering surface as it reflects the heat back onto the metal being soldered for quicker heating as well as creating a reducing atmosphere which helps reduce fire stain. Here's a pair of my sterling silver and 9ct gold huggie hoops on the bench being created.” Thank you for sharing with us! So helpful 🙌 #metalsmithsociety #jewelrymaking #solderingjewelry