The main reason glassware companies started using glass paints to color glassware was purely inexpensive. The production of colored glass requires a lot of experience and special craftsmanship. The production of colored tank glass is very expensive, especially colored glass.
Non-transparent enamels and transparent paints, which were developed and used throughout the centuries in Bohemia and Murano, were adopted after World War II as standard materials in the glassware industry. These paints were no longer used only for exclusive glassware, but were available for normal household glassware.
The original glass paints were applied by hand painting and new application techniques such as spraying and screen printing were developed. Today glass paints can be purchased via online sites.
The use of these paintings flourished, but some major drawbacks soon appeared. The high firing temperature made these glass coatings, due to increased energy costs, expensive.
Strengthening environmental regulations further limited the use of these paints, as the colors originate from metallic oxides. (Some metal oxides are very harmful to the environment and health).
With the development of the chemical industry after World War II, a great variety of organic colors became available and, based on these organic colors, new paints were developed, also for glass.
These organic, resin-based glass paints had an almost infinite color gamut and the glass coatings could be cured at low temperatures. The absence of metal oxides made them the eco-friendly alternative to the coatings available for glass and thus a glorious future lay ahead.