The #3 Soyer Flux is a perfect basecoat flux for cloisonne. Hard fusing.

Merry-Lee uses it extensively to raise the fusing temp of her counterenamel. See free tutorial in the Perfect Silver Blank https://merryleerae.thinkific.com/courses/PerfectSilverBlank

1 ounce- $7.50

2 ounces $13.50

8 ounces $51

1 kilo by special order - $198

Lead Bearing, suggested firing 1450-1550 degrees