Spectrum's Glaze Crystals are all lead-free and can be used successfully from Cone 06 to Cone 6. They produce a variety of effects depending on the color and temperature of the glaze they are applied to. Many beautiful combinations of two or more colored crystals on your choice of glaze background can be used. Spectrum's Glaze Crystals are AP Non-Toxic and Dinnerware Safe when fired to Cone 06 or above. Please be aware that, due to varying expansion coefficients, some of these crystals may cause crazing on some glazes, particularly at stoneware temperatures. Crazed glaze surfaces are not considered Dinnerware Safe. Please test for suitability in your application. See 'Tips' for application... Read More
Spectrum's Glaze Crystals are all lead-free and can be used successfully from Cone 06 to Cone 6. They produce a variety of effects depending on the color and temperature of the glaze they are applied to. Many beautiful combinations of two or more colored crystals on your choice of glaze background can be used. Spectrum's Glaze Crystals are AP Non-Toxic and Dinnerware Safe when fired to Cone 06 or above. Please be aware that, due to varying expansion coefficients, some of these crystals may cause crazing on some glazes, particularly at stoneware temperatures. Crazed glaze surfaces are not considered Dinnerware Safe. Please test for suitability in your application. See 'Tips' for application instructions.
The crystals can be dropped or placed onto the final coat of glaze while the surface is still wet allowing the crystals to stick to the glaze. In this way you can position the crystals where you want them on the piece. Alternatively, you can pour some crystals onto a piece of paper and dip your brush in the crystals as you are applying your final coat of glaze. These crystals may run a lot when fired up to cone 5 or 6 and should not be applied near the bottom of the piece for stoneware firings. This is not of concern at cone 06 or 05 as they will not move and spread nearly as much at lower temperatures. These crystals can also be mixed into a liquid glaze to be brushed on. However, the crystals are large and heavy and tend to settle to the bottom of the container. Therefore, you will need to stir the glaze frequently if you choose to mix the crystals into a glaze.
