It is important that stains of this type be free from soluble vanadium salts to minimize the risk of dimples and other glaze defects.
Primrose yellow to brownish yellow; weaker and less clean in shade than tin-vanadium yellows.
Specific Gravity: 5.5-6.0
Excellent in most types of glazes and bodies for firing at temperatures over 1350C. May be fired in reducing conditions with no risk of fading.
Suitable for blending with all other types of ceramic colors.
Cost is lower the tin-vanadium or zircon-praseodymium yellows.
Note: This description is taken from information provided by Blythe Matthey and may or may not apply to stains of this family from other companies.
Excellent for producing stable shades of ivory (approx 1% concentrations). Best results are obtained with leadless glazes having low boron contents.
Either tin oxide or zircon may be used as an opacifier. The use of zircon helps to prevent solution of the stain by the glaze. The stain should be added to the glaze during the last hour of milling since overmilling tends to weaken the color.
Underglaze Color: Suitable for use under all types of glazes for firing at temperatures up to over 1350C. Generally restricted to applications that require colors for firing at 1100C or above, and to the production of muted pastel shades.
Suitable for all types of bodies and slips for firing at temperatures up to 1350C. Displays no tendency to strike, flash, or to bloat the body. Extremely stable under reducing conditions.
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