Birmingham Mint presses and six planchet presses for making blanks from strip metal. These were installed at the Bath Street works, and in that year trade tokens were struck for use in Australia. In 1851 coins were struck for Chile using the letter "H" as a mintmark. The same year copper planchets were made for the Royal Mint to make into pennies, halfpennies, farthings, half-farthings and quarter-farthings. In 1852 the Mint won a contract to produce a new series of coins for France. In this the Mint pioneered the minting of bronze. Ralph Heaton III (son of Ralph II) took key workers
Metal clay leaving the pure sintered metal. Shrinkage of between 8% and 30% occurs (depending on the product used). Alloys such as bronze, sterling silver, and steel also are available. Metal clay first came out in Japan in 1990 to allow craft jewelry makers to make sophisticated looking jewelry without the years of study needed to make fine jewelry. Fine silver metal clay results in objects containing 99.9% pure silver, which is suitable for enameling. Lump metal clay is sold in sealed packets to keep it moist and workable. The silver versions are also available as a softer paste in a pre-filled