CLSP433.
Spectrum 400 Series Super-Strokes Underglazes.
These underglazes were specifically designed for bisque application.
The Super-Strokes Underglaze line consists of an assortment of rich, vibrant underglaze colors that are opaque with 3 coats, semi-opaque with 2 coats and semi-transparent with 1 coat application and can also be used as a one-stroke underglaze.
CLSP433