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The Laguna Copperplate Inscription (Filipino: Inskripsyón sa binatbát na tansô ng Laguna) is an official acquittance (debt relief) certificate inscribed onto a copper plate in the Shaka year 822 (Gregorian A.D. 900). It is the earliest-known, extant, calendar-dated document found within the Philippines. [1]
The complaint tablet to Ea-nāṣir (UET V 81) [1] is a clay tablet that was sent to the ancient city-state Ur, written c. 1750 BCE. The tablet, measuring 11.6 cm high and 5 cm wide, documents a transaction in which Ea-nāṣir, [a] a trader, sold sub-standard copper to a customer named Nanni. Nanni, dissatisfied with the quality, wrote a ...
In the US, more copper is recovered and put back into service from recycled material than is derived from newly mined ore. Copper's recycle value is so great that premium-grade scrap normally has at least 95% of the value of primary metal from newly mined ore. [79] In Europe, about 50% of copper demand comes from recycling (as of 2016). [80]
Thanjavur Art Plate is an artifact exclusively made in the Thanjavur region of Tamil Nadu, India. It is a circular plate consisting of silver, bronze, and copper embossed with figures of Hindu gods and goddesses at its center. [1] The artwork has been registered for protection under the Geographical indication of the Trade Related Intellectual ...
The Kollam (Quilon) Syrian copper plates, also known as the Kollam Tarisappalli copper plates, document a royal grant issued by Ayyan Adikal, the chieftain of Kollam, to a Syrian Christian merchant named Mar Sapir Iso in Kerala, India. The inscription is engraved on six copper plates in Old Malayalam or early Middle Tamil, using Vattezhuthu ...
Copper electroplating. Copper plating on aluminium. Copper electroplating is the process of electroplating a layer of copper onto the surface of a metal object. Copper is used both as a standalone coating and as an undercoat onto which other metals are subsequently plated. [ 1 ] The copper layer can be decorative, provide corrosion resistance ...
Sikh copper-plate inscriptions. Sikh copper-plate inscriptions ( Tamar Patar) are historical Sikh inscribed copper plates that were commissioned by Guru Gobind Singh and gifted by him to three-known Hindu temples during his guruship period. [note 1] [1] [2] : 302 [3] : 240–242 Three inscribed copper plates of this kind are known.
Copper sheathing. Copper sheathing is a method for protecting the hull of a wooden vessel from attack by shipworm, barnacles and other marine growth through the use of copper plates affixed to the surface of the hull, below the waterline. It was pioneered and developed by the Royal Navy during the 18th century.