Casting Data & Assessment: Refining Filigree Jewelry with Silk Wax Resin and Silver

Introduction

We conducted this research trial as part of our ongoing efforts to refine jewelry casting methods and document precise results for future reference. This specific study, identified as SL-M-W-14 (After Casting), focused on producing filigree jewelry using Silk Wax resin and pure silver metal. The trial allowed us to test adjustments in temperatures, burnout cycles, and additives to achieve cleaner surfaces, sharper details, and improved casting reliability. The information below presents every detail of the setup, process, and outcome so that our customers and partners can rely on our findings as a reference.

Casting Details

• Jewelry Type: Filigree

• Resin Type: Silk Wax

• Investment Type: Optima Prestige

• Investment Bag Open Date: 21/05/2025

• Metal: Pure Silver

• Alloy Code: Legor 8F928CH

• Flask Size: 3.5 x 5 inch

• Tree Type: Manual Casting M. Program 2

• Tree Size: 3 x 3 inch

Casting Tree Before Casting

 

Casting Environment

• Overpressure: 3 Bar

• Pressure (Main Gauge): 4.5 Bar

• Metal Casting Temperature: 1150°C

• Flask Casting Temperature: 715°C

• Casting Delay (Machine): 1 second

• Flask Bench Rest Time: 2 hours

Burnout Process

The burnout schedule was carefully followed to ensure complete resin removal and to avoid microporosity:

• Set 1: 110°C for 2 hours

• Set 2: 780°C for 5 hours

• Set 3: 715°C for 1 hour

• Set 4: Casting temperature 715°C

• Total Cycle: 8 hours

Additives Used

• Borax: Applied to prevent invisible oxidation during the casting process.

Materials & Measurements

1. Total Weight of Water (for investment mixing): 380 (g/mL as per sheet)

2. Weights (as recorded during trial):

• Tree Weight (RP): 12.5 g

• Alloy Weight: 137.5 g

• Pure Silver Weight: 127.1875 g

• Silver Alloy Weight: 10.3125 g

Before Vapor Blasting

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