I melted them in a 285 degree oven for 35 to 60 minutes. The lighter colors melted into perfect dots in 35 minutes. The black beads took about an hour. The benefit of melting one color at a time is the times each color took to melt perfectly. In the end I have 12 colors of enamel dots (about 1,000 of them) - I'll never have to buy them again.