Spectrum Pearl Opals and Red/White Translucent

SPECTRUM PEARL OPALS

While most glasses manufactured specifically for leadlighting and copper-foiling purposes cannot successfully be fused or slumped, we have slumped the glasses listed here to good effect.   The shapes we have found to work well are the single and multiple bridge candleholders, small sushi type plates, and small origami bowls.  Obviously, as the glass is only 3 mm thick, and there is only one thickness of glass, any shapes made are relatively fragile.

Provided the slumping temperatures are kept to about 660-670 degrees Celsius, the Pearl Opals should not devitrify.  If you are concerned about the possibility of devitrification, products such as Hotline Spray A over-glaze or Borax can be used to prevent devitrification.  Note that whilst Hotline Spray A over-glaze is 100% lead free, Borax is NOT food-safe.

The Pearl Opals feature a subtle 'Corsica' texturing and may be fired on either the textured or non-textured side. 

SPECTRUM RED/WHITE TRANSLUCENT

We have successfully fused and slumped one Spectrum glass manufactured specifically for leadlighting and copper-foiling purposes - that is, Spectrum Red/White Translucent 357-1S.

If you are seeking to fuse this glass, you should test first for compatibility.  We have found it fuses very well about 750 degrees Celsius (our kilns).  We have observed that the hotter the kiln temperature, the more the colour changes to a dark blood red. 

 


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