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Thompson Enamel Transparent - 2210 Soft Yellow 2oz

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Product Description

Metals: Recommended for fine copper, silver and gold
Recommended Firing Range: 1400°–1550°F (760°–845°C)
Firing: Consistent with general firing times.
COE: 321 cubic expansion  
Grade: 80 Mesh
Type: Transparent
Size: 2oz

Thompson Enamel Transparent - Medium Temperature, Medium Expansion enamels are a glass product formulated to create a permanent bond with fine silver, copper, and gold. Bronze is not recommended for enameling. These high quality, acid-resistant, 80-mesh enamels will provide rich, beautiful color for your metal clay work.

Color image are reference for each color on different metal ( It is always prudent to pre-test enamel colors on examples of the workpieces you are using to resolve any slight variances that may occur in different batches of enamel and its performance on your specific metals). *Some color are over Gold.

*The general firing range for Thompson enamels is 1400°–1500°F (760°–815°C). Enamels will fuse in 1 to 4 minutes depending on the color, type and thickness of the metal, and the temperature of the kiln.   A typical firing is 1450°F (790°C) for around 2 minutes.  Enamel powders will change in color after firing.  Refer to the color image for a general indication of the fired result.  Enamel colors may vary slightly from batch to batch, so pre-testing your enamels before using them is recommended.  Bronze is not recommended for enameling.  The enamels are not formulated to adhere to it and will crack or chip off.

Additional Firing Notes:
Color Code: (C) Contains Cadmium. This is a reactive color that will turn dark and opaque when fired directly on silver or copper. It will also darken if exposed to prolonged heat. Take care not to over fire. Firing on Copper: Firing a clear flux layer first will completely eliminate the problem. The initial firing of 2020 or 2040 clear should be at 1550°F (845°C) to clear the oxides off the metal. The copper should appear clean and bright under the enamel If it appears reddish or mottled it wasn't fired hot enough and/or long enough. Refire at high temperture. Subsequent color firings should be at lower temperatures to avoid over firing the color. Firing on Silver: This silver sample pictured is sheet metal and was fired directly and over a single layer of 2040 Clear. The reaction is somewhat mitigated over the clear, but there is still some bleed through. If attempting on silver, fire at least two layers of 2020 or 2040 Clear on to the silver, and then reduce the temperature of the kiln before firing the color. This technique often works well on sheet metal, but is less effective on metal clay due to it's porosity which releases more silver salts into the enamel. Color reaction frequently bleeds through even with the clear barrier underneath. Also, the more often it's fired, the more likely there will be a reaction, so this color should be saved for a final firing if at all possible. It may also be fired over gold foil to reduce or eliminate color reaction. Be sure to test techniques before commiting a valuable piece. Overall, this is not a color recommended for silver for those less experienced with enameling. It's important to become comfortable and achieve some level of success with the Standard and (A) colors before trying the more challenging colors.

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