I’ve very successfully used a flour and water paste made from rice or
cereal flour. Even mustard will work.
I’ve done the best work using a compound of copper sulphate, rice
flour and water!
All you need is a substance that is carbon based.
What actually happens is that the glue is reduced to a carbon deposit
during heating. This combines with the oxygen in the copper oxide on
the surface forming carbon dioxide, the copper then forms a eutectic
alloy on the surface of the granule and the plate and this fuses the
Gold and Stone