They are rich colors and can be used for all over coverage similar to an opaque underglaze.  Colors may be mixed together to create unique
Amaco Lead-Free Velvet Underglazes
V-345 Light Green (2 oz) Amaco Velvet Under-Glaze
This Velvet Underglaze set includes twelve 2 oz. bottles of the following Velvet Underglaze colors: V-372 Mint GreenV-373 Medium BrownV-374 Royal
Amaco Velvet Underglaze Set No. 3 (2 oz.)
V-345 Light Green (2 oz) Amaco Velvet Under-Glaze Amaco Velvet UnderGlazes are semi-translucent. Note: Choose from the LUG underglazes for more opaque
V-345 LIGHT GREEN (2 OZ) Amaco Velvet Under-Glaze
Amaco Lead-Free Velvet Underglazes
AP Non-Toxic Amaco Velvet Underglaze Set #2
Underglaze questions/ help - Ceramics - Dallas Makerspace Talk
AMACO Velvet Semi-Translucent Underglaze Set 2
Amaco F Series Low Fire Pottery Glazes (6 Pints)
Medium Blue Velvet Underglaze is a brilliant primary blue that is vivid at cone 05, darker at cone 5, maintaining its blue color. A clear glaze over Medium Blue will significantly darken the color at any temperature.
Amaco Velvet Underglaze 2 oz. Medium Blue
Amaco Velvet Underglazes 2oz Sizes-Chicago – The Pottery Studio
Underglaze Sets United Art & Education
V) Velvet Underglazes Archives - Page 8 of 8 - Quarry Arts Centre