need help - opaque turns grey afer firing

[Yojimbo]

Hello need help
using Argedent 35SF gold on Abutment Direct castable gold abutment but my opaque turns grey once it come out from furnace. Anyone has this happen before? My gold turn bad?

 

[sidesh0wb0b]

pics? what type of opaque/porcelain? did you check firing program parameters? degas properly?

*i use 35SF and have no issues*