Spectrum’s 300 Series Ultraglazes are a very versatile line. They can be used in 4 ways: as Majolica Colors, Underglaze, Low Fire Glaze or Mid Range Glaze.
As Majolica, 1st apply 2-3 coats of a base white glaze to a Cone 04 bisque piece (Spectrum recommends #799 Majolica White- see Spectrum’s 700 Series colors) and allow to dry thoroughly. Paint 300 series colors directly on top of the unfired white glaze surface: One Coat gives the traditional Majolica look in which some of the white background shows through. Two Coats will yield more opaque colored designs. Fire to Cone 05.
As Underglaze, apply to Cone 04 bisque. One Coat for semi-transparent color: Two Coats for semi-opaque color: Three Coats for solid opaque coverage. Allow to dry thoroughly and cover with 2 coats of #700 clear. Fire to Cone 05.
As Low Fire Glaze, apply 3 brushed coats to Cone 04 bisque and fire to Cone 05. The colors will vitrify with a medium-gloss surface: (not quite as shiny as the 700 Series Glazes).
As Mid Range Glaze, apply 3 brushed coats to Cone 04 bisque and fire to Cone 5. Colors will be bright and glossy.
All the 300 Series colors are AP Non-Toxic and Dinnerware Safe when used and fired as described above.
Please note: when purchasing the 2 Oz size of any Ultraglaze color it will be packaged in a squeeze bottle with a pointed plastic tip. The bottle label will show a 400-series # rather than the 300-series # that the larger sizes have. For example, #301 will be labelled #401. The name of the color will also be different. The product is the same as the larger sizes: only the packaging is different.