Forever White...See the Difference
With Stuller's X-1 White Gold®, you get premium white color that provides the look of platinum at the cost of gold. You no longer need to rhodium plate in order to achieve a bright white surface finish. X-1 White Gold® has been enhanced with trace elements that provide grain structure control, ductility, and improved mechanical properties, while maintaining excellent casting characteristics and providing for an excellent surface finish. Tested and approved by the Stuller manufacturing team.
Metal categories available in X-1 White Gold:
Other categories available in X-1 White Gold:
How White is White?
Much of today's white gold jewelry is a yellowish or off-white karat gold alloy that has been rhodium plated to provide a bright-white finish. Unfortunately, when the rhodium plating wears off, it becomes obvious that the gold is not very white at all. Because of this issue, the Manufacturing Jewelers and Suppliers of America (MJSA) and the World Gold Council created the White Gold Task Force. The WGTF's purpose was to create guidelines and a grading system for determining the color of white gold alloys, and to define how white an alloy must be to be classified as a "white gold."
As a result of this classification system, the levels or grades of whiteness for which rhodium plating is considered necessary , optional, or not needed were developed.
The grading system is based on the YID 1925 (Yellowness Index) of each white gold alloy. Test results for the various white alloys were established using a color spectrophotometer and specific lighting conditions.
The guidelines for white color are as follows:
- Grade 1: Premium White Color; Rhodium plating is not required to achieve a good white finish.
YID rating is less than 19.
- Grade 2: Moderate White Color: Rhodium plating is optional.
YID rating is between 19 and 24.5.
- Grade 3: Off-White Color: Rhodium Plating is required to achieve an acceptable white color.
YID rating is between 24.5 and 32.
Gold alloys with a YID rating greater than 32 are not considered to be “white gold.”
STULLER WHITE GOLD ALLOYS
Here are some exceptional benefits of X1:
- Premium white color that stays white, and compares to the elegance and color of platinum
- Excellent stone setting characteristics
(Dead set with very little prong spring back)
- Meets all of the European nickel release tests
- Alloyed at .585 Gold content to meet all international fineness requirements
- May be used in conjunction with other precious metals
- The X1 family has been color tested by the American Assay and Gemological Office, and has received the level 1 (premium white color) rating, which specifies that rhodium plating is not required to achieve good white color.
- X1 samples submitted to the American Assay and Gemological Office for nickel release testing, have met the current EN:1811 European nickel release rate requirements.
No matter what your white gold casting grain and mill product needs are, Stuller has the white gold solution for your particular application. Stuller’s white gold offering ranges from low nickel-soft white alloys to high nickel and high palladium alloys with a premium white color.
TECHNICAL DATA AND INFORMATION
Description: X1 casting grain produces a white finish with a Level 1 white color (YID <19). These casting grain formulas are deoxidized and grain refined, and are designed for casting applications only. X1 sheet, wire, and sizing stock, and solder is available in 14kt and 18kt.
|Gold Content (minimum)||0.417||0.585||0.75|
|PHYSICAL AND MECHANICAL PROPERTIES||10KT||14KT||18KT|
|Hardness- As Cast (VHN)||158||204||231|
|Yield Strength (PSI)||26950||32100||31600|
|Ultimate Tensile Strength||78590||83553||93745|
|MELTING TEMPERATURE DATA||10KT||14KT||18KT|
|Casting (°F)||150°F to 225°F above liquidus temperature|
|Flask Rance (°F)||1050-1200°||1050-1150°||1050-1150°|
|*Quench time (range in minutes)||2-4||2-4||2-4|
|Remelting||We recommend a 75% fresh mix when reusing|
|OPTIMAL TEMPATURES MAY VARY ACCORDINGTO TYPE OF EQUIPMENT USED.|
|NICKLE RELEASE DATA||10KT||14KT||18KT|
|EN 1811:1999 Requirements||_<.5||_<.5||_<.5|
IMPORTANT *Quenching: As a general rule, quench just prior to the red glow leaving the button (unless casting diamonds or gemstones set in wax.) If the optimal quench is missed, ductility may be recovered by annealing the casting(s).
Annealing: Heat in an oven set to 1350-1400 °F for 10 to 20 minutes, depending on size of castings. Quench immediately. Do not allow to air cool.
**Stuller does not guarantee that all products manufactured with X1 will achieve the same test results for nickel-release rates, a s condition of samples can affect results.
Under certain conditions, all nickel-white gold alloys are susceptible to stress corrosion (cracking).
Stuller cannot guarantee the X1 family to be completely immune to stress corrosion.