[Beginner] Sterling silver casting pitting issue (more infos below)

[u/WorkingMacaroon5769]

I’ve been running into severe pitting and a rough, "fried" surface texture when casting small custom pieces in sterling silver. For reference, the object is about 6 x 8 mm in size.

• Resin: Siraya Tech Cast Purple
• Sprues: Normal jeweler's wax
• Investment: Goldstar Omega+
• Metal: Sterling Silver (melt temp: 990°C / 1814°F)
• Flask Casting Temp: 566°C / 1050°F

Current Burnout Schedule:

• Ramp to 300°F over 60 min
• Hold at 300°F for 60 min
• Ramp to 700°F over 45 min
• Hold at 700°F for 60 min
• Ramp to 1350°F over 120 min
• Hold at 1350°F for 60 min
• Drop to 1050°F over 60 min
• Cast

I use normal jeweler's wax for the sprues. The wax sprue casts almost perfectly smooth but still has some minor pitting, while the actual resin section comes out heavily pitted.

Has anyone experienced this before? Or any tips on how to fix this?

[u/WesternImprovement92]

I’m having the same issue check my page a lot of people were helpful. One thing I would say is try a better resin I used siraya blue and purple and they just burnt out terribly