General, Safety & Product Information:
    Dogwood Ceramic Supply actively stocks the entire line of Spectrum 500 Series Underglazes in the 2 ounce sample and pint bottles in our Gulfport Mississippi showroom and warehouse.  Select gallons are actively stocked by Dogwood Ceramic Supply, with the entire line in gallon size being available with an advanced order.  Volume discounts are available for purchases of Spectrum Underglazes.
    The entire line of Spectrum 500 Series of Underglazes are nontoxic and food-safe when the item has been glazed with a food-safe glaze and properly fired.  Unlike most other brands of traditional underglaze, Spectrum uses a frit (glaze) base rather than a slip (clay) base for the underglaze.  The advantage to the user is that these versatile underglazes can be used with or without a clear glaze and while the product prefers to be applied to greenware, the product does work well when applied to bisque.  If left unglazed, the color of the 500 Series will be fully developed with a soft matte appearance at low fire temperatures, and a slight glossy sheen at high fire temperatures.  As shown on the low fired tile pictures, the top half of the tile has been left unglazed and the bottom half has been glazed.  The 500 Series is capable of being fired from Cone 06 to Cone 10, with best performance between Cone 06 and Cone 6 in oxidation (electric kiln).  The opaque coverage of the 500 Series was achieved with 3 flowing coats of product on a white tile.  If the 500 Series underglazes are used on a colored clay, some clay color may show through the underglazes, especially so with the lighter colors.  The 500 Series can be used as a One-Stroke underglaze, though the product is not as smooth and refined as the 600 Series underglazes.