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Egyptian Blue Opal (164) 3mm-The Glass Underground

Egyptian Blue Opal (164) 3mm

  • $ 33.75
  • Save $ 14.50




Copper bearing glass that reacts to sulfur bearing glasses, Reactive Cloud (009), Reactive Red (1019) and Reactive Ice (1009). Opalizes upon firing. May contain thin threads of color variation. At a full fuse, Egyptian Blue Opalescent has the potential to deposit trace amounts of copper on the surface of the kilnshelf. These deposits may react with sulfur-bearing glasses in subsequent firings. Processes that require greater heatwork, such as pattern or flow bar techniques, can also lead to copper deposits. Such deposits may not be visible and can react even when the shelf has been properly scraped and reprimed or, alternatively, when used ThinFire has been removed and new ThinFire is applied. This type of contamination is impermanent and may be burned out/fired out over the course of subsequent firings. A contaminated shelf can be fired with glasses—other than sulfur-bearing glasses—and no reaction will take place. In our studios, we've observed the greatest contamination in subsequent firings with sulfur-bearing French Vanilla Opalescent (000137) and Spring Green Opalescent (000126). For a burnout firing, we recommend a rate of 300°F/hr to 1525, with a hold of 1:00.

Sheet sizes are:

1/2 Sheet - 20" x 17 1/2"

1/4 Sheet - 10" x 17 1/2"

20" x 20"

10" x 10"

5” x 10”

Sample: 2 1/2” x 3”

5” x 10”s are perfect for testing colors before you commit to buying a larger piece, or if you just need a small piece. **Please note, 5" x 10" pieces may vary in size.**

Our Samples are larger than Bullseye’s in order to give you a better sense of the color. Keep several on hand to create color palettes and test transparent layers. Strikers will come pre-fired so you can see the fully developed color. Samples available in 3mm Opals, Collage, or 3mm and 2mm Transparents.

For a full sample set of all opal and transparent colors in 3mm, click here.

Please click to add one Glass Handling Fee to your glass order for 1/2 and 20" x 20" sheets.

We will bill you through PayPal if your handling fee is not included.

Reaction Chart: Download PDF