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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]
It was the first printing process that yielded half-tones without using line- or dot-based techniques like hatching, cross-hatching or stipple. Mezzotint achieves tonality by roughening a metal plate with thousands of little dots made by a metal tool with small teeth, called a "rocker".
The process was developed in Germany in the 1430s from the engraving used by goldsmiths to decorate metalwork. Engravers use a hardened steel tool called a burin to cut the design into the surface of a metal plate, traditionally made of copper. Engraving using a burin is generally a difficult skill to learn.
The archaeology of the Philippines is the study of past societies in the territory of the modern Republic of the Philippines, an island country in Southeast Asia, through material culture. The history of the Philippines focuses on Spanish colonialism and how the Philippines became independent from both Spain and the United States.
'Metal period' c. 2500 to 1500 bp [9] or Metal Age (500 BCE - AD 960 or 500 BCE - 500 AD). [2] Pre-colonial period, there was a more centralized production of pottery in certain areas. An example of one of those sites is Tanjay in the Negros Island, which existed from AD 500 - 1600, however it extents a little into the colonial period as well. [2]
Steel engraving. Steel engraving is a technique for printing illustrations based on steel instead of copper. It has been rarely used in artistic printmaking, although it was much used for reproductions in the 19th century. Steel engraving was introduced in 1792 by Jacob Perkins (1766–1849), an American inventor, for banknote printing.
The Butuan Silver Palaeograph, also known as the Butuan Silver Strip, is a piece of metal with inscriptions found in Butuan, Agusan province in mid-1970s by a team of archaeologists from the National Museum of the Philippines. Treasure hunters who were looking for old ceramics and gold ornaments discovered this metal strip inside a wooden coffin.
Copper was the initial metal of choice for early plates, but by the eighteenth century pewter became the standard material due to its malleability and lower cost. [2] At first, plates were engraved freely by hand. Eventually, music engravers developed a number of tools to aid in their process, including: A rastrum to draw staff lines