Procure AZ Contract: CTR042183 [Engraved Products – Set Aside]
Engrave: to cut or carve lines, letters, designs, etc., onto or into a hard surface
According to Wikipedia, the first evidence of human engravings are patterns chiselled on shells, dating back between 540,000 and 430,000 years, from Trinil, in Java, Indonesia. Hatched banding on ostrich eggshells used as water containers found in South Africa in the Diepkloof Rock Shelter and dated to the Middle Stone Age around 60,000 BC are the next documented case of human engraving. Engraving on bone and ivory is an important technique for the Art of the Upper Paleolithic. Large engraved petroglyphs on rocks are found from many prehistoric periods and cultures around the world, including many examples here in Arizona.
In the European Middle Ages goldsmiths used engraving to decorate and inscribe metalwork. It is thought that they began to print impressions of their designs to record them. From this grew the engraving of copper printing plates to produce artistic images on paper, known as old master prints in Germany in the 1430s. Italy soon followed. Many early engravers came from a goldsmithing background.
Engravers mainly use two different processes. The first and most common ‘Diamond Drag’ pushes the diamond cutter through the surface of the material and then pulls to create scratches. These direction and depth are controlled by the computer input. The second is ‘Spindle Cutter’. This is similar to Diamond Drag, but the engraving head is shaped in a flat V shape, with a small diamond and the base. The machine uses an electronic spindle to quickly rotate the head as it pushes it into the material, then pulls it along whilst it continues to spin. This creates a much bolder impression than diamond drag. It is used mainly for brass plaques and pet tags.
ACI’s skilled engravers use different types of computerized engraving machines to create customized items in metal, plastic and wood.