
1) Blue glass 2) Cobalt glass colorer 3) Deep blue paint 4) Deep blue pigment 5) Deep-blue color 6) Deep-blue glass 7) Deep-blue paint 8) Deep-blue pigment
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https://www.crosswordclues.com/clue/smalt

deep blue
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http://phrontistery.info/s.html

• (v. t.) A deep blue pigment or coloring material used in various arts. It is a vitreous substance made of cobalt, potash, and calcined quartz fused, and reduced to a powder.
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http://thinkexist.com/dictionary/meaning/smalt/

A blue pigment produced by grinding a coloured glass mixture containing cobalt oxide to a fine powder. It was used in the manufacture of bristol blue glass and in powder-blue ground in ceramics.
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http://www.antique-marks.com/antique-terms-s.html

A blue pigment produced by grinding a coloured glass mixture containing cobalt oxide to a fine powder. It was used in the manufacture of bristol blue glass and in powder-blue ground in ceramics.
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http://www.encyclo.co.uk/visitor-contributions.php
Smalt noun [ Italian
smalto , Late Latin
smaltum ; of Teutonic origin; confer Old High German
smalz grease, butter, German
schmalz grease, Old High German
smelzan to melt, German
schmelzen . See
Smelt ,
transitive verb , and co...
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http://www.encyclo.co.uk/webster/S/126

Smalt is a type of glass in which protoxide of cobalt has been mixed with common glass to produce a glass with a deep blue tinge to it. Smalt was discovered by a Bohemian glass blower in the 16th century. The blue glass so produced may also be ground to a fine powder to produce a blue pigment, also called smalt, which was once used to tint starch a...
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http://www.probertencyclopaedia.com/browse/GS.HTM

A type of cobalt blue glass or frit. Manufactured in the Netherlands in the 16th century. It survived until the introduction of French ultramarine and then lost popularity owing to its weak tinting power and rather unpleasant gritty feel in working.
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http://www.visual-arts-cork.com/colour-art-glossary.htm

deep blue pigment or coloring material used in various arts. It is a vitreous substance made of cobalt, potash, and calcined quartz fused, and reduced to a powder.
Found on
http://www2.shu.ac.uk/sfca/glossary.cfm
No exact match found.