Painted Amberina

On April 9, 1895, a patent was issued to Andrew Stock and Emil Mueller of Pittsburgh, Pennsylvania, covering a process for manufacturing shaded and parti-colored glassware by painting the glass partially with a paint composed of copper oxide and yellow ochre.

This first partial painting was fixed by placing the article in a muffle and bringing it to a high temperature. After the article had cooled it was painted all over with this same compound and again reheated in a muffle.

The heating brought out the ruby color in the first coat of paint and changed the second to a yellow, amber or green color. Such wares can be encountered by collectors today.

NEW ENGLAND ENAMELED CORALENE AMBERINA PITCHER XLNT    US $29.99

MOSER AMBERINA ART GLASS VASE    US $265.00

These are easily detected, especially when portions of the painted coloring have been worn away with use. It also has an iridesence which is peculiar to wares painted with metallic stains.

Source: Nineteenth Century Glass - It's Genesis and Development