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On the left is Spectrum 748 fire engine red cone 04 glaze. With three coats. On the right is Amaco V-388 underglaze, also with three coats. It is covered with Spectrum 700 transparent. Both were glaze fired to cone 05 and bisque fired to cone 04. The color intensity of the glaze on the left varies with thickness, the ridges of the throwing lines are clearly highlighted by this. But underglaze on the right is completely opaque, there is no variation on any contours. Of course, the underglaze method is more costly, the bottles are three times the price of those of the glaze of the same color.
Glossary |
Underglaze
A intensely pigmented and highly opaque brushing compound meant to be applied to leather hard pottery and covered with a transparent overglaze. |
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