Spectrum Cobalt Blue 5537 One-Stroke Underglaze Size:Pint Cone 10 reduction (smaller image):

Cone 10 reduction (smaller image): Crystals and base showcase more blue hues

becomes more transparent

Crystals become darker and more defined

then buff to a beautiful luster

Spectrum Cobalt Blue 5537 One-Stroke Underglaze Size:Pint Cone 10 reduction (smaller image):The One Stroke 5500 Series Underglazes are all lead free, dinnerware safe, and A P non toxic when covered with a clear glaze. One Strokes can be used at almost any temperature range and can be applied to bisque or raw clay. Due to their high concentration One Strokes only need 1 application for full opaque coverage. The samples shown are at Cone 05, but the One Strokes can be fired from low temperature (cone 06 04) to high temperature (cone 9 10).