4. Painting on Bark is the oldest form of Aboriginal art but many bark paintings have perished over time. Not only is the bark prone to decay and disintegration, but the ochre paints too need a stable substrade (base on which to paint) to lengthen their own relatively short life. 5.ainting on Bark is the oldest form of Aboriginal art but many bark paintings have perished over time. Not only is the bark prone to decay and disintegration, but the ochre paints too need a stable substrade (base on which to paint) to lengthen their own relatively short life.
If CHG solutions come into contact with eyes, wash them out promptly and thoroughly with water. You also should avoid contact with the meninges or the middle ear. CHG is toxic to nerve tissues with direct contact, although this has not been reported with currently used agents.
Mercury forms useful compounds with other elements. Mercuric chloride (HgCl 2) is a very poisonous salt and was once used to disinfect wounds. Mercurous chloride (Hg 2 Cl 2), also called calomel, is an antiseptic used to kill bacteria.Mercuric sulfide (HgS) is used to make a red paint pigment called vermilion.istory and Uses: Mercury was known to the ancient Chinese and Hindus and has been found in 3500 year old Egyptian tombs. Mercury is not usually found free in nature and is primarily obtained from the mineral cinnabar (HgS). Spain and Italy produce about half of the world's supply of Mercury.