As for working with glass, Art Clay shrinks approximately 8 percent. When designing a piece where you will set a stone, a bead or a piece of glass after firing, it is recommended to sketch your desired finished design and then slightly enlarge the drawing on a copier so the shrinkage is taken into account. Use the enlarged drawing as a guide when creating your piece in Art Clay. To accommodate the sea glass, consider creating a bezel or a design with prongs that can be used to set the glass after firing.
Glass can withstand being fired; each type of glass has a different heat tolerance and marrying the metal and the glass can be a little tricky. Given you have found your glass it would be difficult to know what temperature each piece will be able to withstand and what results you would achieve. Also, sea glass has a nice frost to it--this frost would most likely be lost in the firing process even if it survived.
Products sold by Fire Mountain Gems and Beads® are intended for experienced jewelry-makers and designer-artists; children 14 years of age or younger should use these products with adult direction.
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