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The bead with its design than has to be fired at the proper temperature, not too hot lest the beads fractures, but hot enough so as to permit the chemical etching of the carnelian stone. [10] The result design comes out beautifully white, usually with some surface calcinated residues which can be easily brushed away.
Anodic etching has been used in industrial processes for over a century. The etching power is a source of direct current. The item to be etched (anode) is connected to its positive pole. A receiver plate (cathode) is connected to its negative pole. Both, spaced slightly apart, are immersed in a suitable aqueous solution of a suitable electrolyte.
Etched Carnelian beads: are a type of ancient decorative beads made from carnelian with an etched design in white. They were made according to a technique of alkaline-etching developed by the Harappans during the 3rd millennium BCE and were widely disperced from China in the east to Greece in the west. [56] [57] [58]
These can be plain, naturally banded [5] agate beads, or etched beads (often with black and white striped patterns). Some are carnelians or black agate with thin white etching patterns resembling the back of a turtle, which is an ancient pattern that dates back to the era of the Harappan Indus culture.
A selection of glass beads Merovingian bead Trade beads, 18th century Trade beads, 18th century. A bead is a small, decorative object that is formed in a variety of shapes and sizes of a material such as stone, bone, shell, glass, plastic, wood, or pearl and with a small hole for threading or stringing. Beads range in size from under 1 ...
Etched carnelian beads – are a type of ancient decorative beads made from carnelian with an etched design in white. They were made according to a technique of alkaline-etching developed by the Harappans during the 3rd millennium BCE and were widely disperced from China in the east to Greece in the west. [127] [128] [129]
The widespread popularity of glass beads does not mean aboriginal bead making is dead. Perhaps the most famous Native bead is wampum, a cylindrical tube of quahog or whelk shell. Both shells produce white beads, but only parts of the quahog produce purple. These are ceremonially and politically important to a range of Northeastern Woodland ...
Glass etching, or "French embossing", is a popular technique developed during the mid-1800s that is still widely used in both residential and commercial spaces today. Glass etching comprises the techniques of creating art on the surface of glass by applying acidic, caustic, or abrasive substances.