At an exhibition of his enamels at Underwood Galleries in Sydney in 1965 Hesling said :'I have expressed myself in many different ways in order to prove the validity and versatility of vitreous enamel as a painting medium.
42.
It was a nine metre by two metre photo work on steel panels ( screen-printed onto vitreous enamel ) featuring 13 people encountered on the streets of Dublin in the form of an interpretation of Leonardo da Vinci's masterpiece.
43.
""'Cloisonn?" "'( ) is an ancient technique for decorating metalwork objects, in recent centuries using vitreous enamel, and in older periods also inlays of cut gemstones, glass, and other materials.
44.
Vitreous enamel has many useful properties : it is smooth, hard, chemically resistant, durable, scratch resistant ( 5-6 on the Mohs scale ), has long-lasting colour fastness, is easy to clean, and cannot burn.
45.
For the patterns and decoration, for example, the five colours called " gosai-de " made out of vitreous enamel are painted on the vessel with thick strokes, making the whole piece more three-dimensional in the end.
46.
The first tanks were labelled externally as being glass-lined ( they were actually vitreous enamel ), meaning that the wagons themselves were unauthorised for loose or hump shunting, a reminder of which was applied in large capital letters to the chassis.
47.
The viscosity decrease of lead glass melt is very significant ( roughly 100 times in comparison with soda glasses ); this allows easier removal of bubbles and working at lower temperatures, hence its frequent use as an additive in vitreous enamels and glass solders.
48.
Limoges was already the largest and most famous, but not the most high quality, European centre of champlev?vitreous enamel production by the 12th century; its works were known as " Opus de Limogia " or " Labor Limogiae ".
49.
His work included painting ( instrumental in developing geometric art in Australia ), photography, film-making, theatre design, fabric design, murals, kinetic and static sculpture, stained glass, vitreous enamel murals, op-collages, computer graphics, and laser art.
50.
He made many improvements regarding the manufacture of porcelain such as the change from coal to wood stoves, the development of the casting, which resulted in large parts, a lightweight a blameless purity of form, the renovation of the manufacture of bone china and vitreous enamel on metal.
