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Silkwax Wax Castable Resin
Silkwax Castable Wax Resin

Designed for professional jewelry manufacturers, Silkwax is a premium castable resin with 80% wax content, crafted to deliver a smooth surface finish and crisp detailing. Ideal for filigree and mid-gauge designs, it offers a casting experience that replicates traditional wax with the added precision of digital printing. Silkwax ensures zero ash, no carbon residue, and no thermal expansion, making it exceptionally reliable for fine jewelry casting.

  • For Filigree & Fusion Designs

  • 80% Wax

  • No Shrinkage

  • For DLP & LCD

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Information

Technical Details

Filigree Fusion Standard Solid Parts Chains
Printability
Filigree
Fusion
Standard
Solid Parts
Chains
Castability
Filigree
Fusion
Standard
Solid Parts
Chains

 

Property Value Standard
Property
Density
Value
1.08 gram/cm3
Standard
ASTM D1475-13(2020)
Property
Tensile Strength
Value
11 MPa
Standard
ASTM D638-14
Property
Flexural Strength
Value
7.06 MPa
Standard
ASTM D790-02
Property
Flexural Modulus
Value
170 MPa
Standard
ASTM D790-02
Property
Shore D Hardness
Value
58
Standard
ASTM D2240-15(2021)
Property
Viscosity
Value
9.53 Seconds
Standard
DIN 53211-4
Property
Color
Value
Sky Blue
Standard
-

Printing Instructions

  • Make sure to Pre-Heat up to 45C the Resin and shake the bottle for 30 seconds to 1 minute before pouring into the Tray.
  • If the Resin is sitting on the tray for longer Periods, Make sure to Mix it with Silicone Spatula Timely.
  • It is a good practice to filter the Resin after every Job.
  • Silkwax requires proper support structures for optimal printing.
    It is recommended to use supports with circular contact points, such as those provided by BelSupports, to prevent surface damage during removal. Ensure the spacing between supports is not too wide to maintain stability and avoid print failures.

  • For LCD Users:

    It is suggested to use PFA or FEP films with a thickness of 127 microns or less


Washing & Postcuring

  • Washing Instructions

    • Use 99% Ethyl Alcohol for the initial cleaning of printed models to ensure effective resin removal.
    •  Rinse first time with dirty alcohol then dry with compress air.
    •  Rinse second time with fresh alcohol then dry with compress air.

    Post Processing

    • Soak the dried models in fresh 99% Ethyl Alcohol for 5 minutes, followed by another round of drying with compressed air.
    • Post-cure the cleaned and dried models under UV light for 2-5 minutes to ensure full polymerization. In case of Ultra Filigree designs 2 Minutes would be enough. For higher guages UV curing time can be increased. 

Investment Mixing

Proto Resins recommends the following Investment Powders:

  • Prestige Optima by Certis
  • Ransom and Rundolph's Plasticast
  • G-Mix by Gesswein
  • X-Vest by Bluecast

Investing and casting from resin prints can be tricky, to say the least. The following recommendations are meant to assist our customers in obtaining the best possible casting results when investing and casting from resin prints.

It is recommended to use a 37/100 water to powder ratio for investing large, thicker prints, and a 38/100 ratio for lighter, smaller prints. Using more water will create a weaker investment mold for burning out resin.

After investing is completed, and before proceeding with burnout, allow invested flasks to sit (bench-set) undisturbed in a vibration-free area for a minimum of 3 to 4 hours (depending on flask size). (3 hours for flask sizes less than 3” x 4” (76.2 x 101.6 mm) and up to 4 hours for larger flask sizes. Drying out the investment and removing too much moisture can lead to mold cracks and metal flashing.

It is advised to use Investment Brands that are exclusive for Resin Casting and pay special attention to the manufacturer’s instructions as well.

Burnout Cycles

BURNOUT CYCLE #1

(Recommended for flask sizes less than 50.8 x 76.2 mm (2” x 3”))

  1. Load flask into room temperature oven, and ramp to 150°C (302°F) over 30 minutes.
  2. Hold at 150°C (302°F) for 3 hours.
  3. Ramp to 750°C (1382°F) over 3 hours.
  4. Hold at 750°C (1382°F) for 4 hours.
  5. Reduce oven to flask temperature for casting.
  6. Hold flask temperature for casting for 2 hours to stabilize temperature throughout the mold.
  7. Cast.

BURNOUT CYCLE #2

(Recommended for flask sizes larger than 50.8 x 76.2 mm (2” x 3”))

  1. Load flask into room temperature oven and ramp to 110°C (230°F) over 30 minutes.
  2. Hold at 110°C (230°F) for 3 hours.
  3. Ramp to 450°C (842°F) over 1 hour (60 minutes).
  4. Hold at 450°C (842°F) for 2 hours.
  5. Ramp to 780°C (1436°F) over 2 hours.
  6. Hold at 780°C (1436°F) for 4 hours.
  7. Reduce temperature to desired flask temperature for casting.
  8. Hold flask temperature for casting for 2 hours.
  9. Cast.

RAPID BURNOUT #1

(For use with small flasks less than 50.8 x 50.8 mm (2” x 2”) with one or two prints on tree)

  1. Load flasks into oven pre-heated to 150°C (302°F).
  2. Hold at 150°C (302°F) for 2 hours.
  3. Ramp to 450°C (842°F) over 1 hour.
  4. Hold at 450°C (842°F) for 30 minutes.
  5. Ramp to 780°C (1436°F) over 1 hour.
  6. Hold at 780°C (1436°F) for 2-3 hours (depending on thickness of design).
  7. Reduce oven to flask temperature for casting.
  8. Hold flask temperature for casting for 1 hour.
  9. Cast.

RAPID BURNOUT #2

(For use with flask sizes less than 3” x 4”) Observe recommended bench-set time.

  1. Load flasks into oven pre-heated to 550°C (1022°F).
  2. Hold at 550°C (1022°F) for 1 hour.
  3. Increase temperature to 780°C (1436°F) within 2 hours.
  4. Hold at 780°C (1436°F) for 4 hours.
  5. Reduce temperature to desired flask temperature for casting.
  6. Hold flask temperature for casting for 1 hour.
  7. Cast.

Ultra 4 Hour RAPID BURNOUT #1

  1. Ramp to 720 C
  2. Hold for 1-2 Hours
  3. Ramp down to casting tempreature and hold for 1-2 Hours
  4. Cast