Yellow Brass
Bright-yellow brass or Bristol-sheet is composed of copper 16, zinc 6. Copper 16 and zinc 5 is Dutch alloy, which is a deeper yellow; and a very deep yellow, called pinchbeck, semilor, and bath-metal, is composed of copper 16, zinc 4. Good yellow-brass wire is copper 16, zinc 7; and good ordinary brass, bright yellow, is copper 16, zinc 8. Copper 16, zinc 9 makes a full yellow brass, usually called Muntz's extreme. Sheathing is composed of copper 16, zinc 10; and a paler yellow is copper 16, zinc 12, which is a good solder for copper or iron. Pale-yellow dipping-brass is composed of copper 16, zinc 14. Yellow brass is made sensibly harder by adding from 1/4 to 1/2 oz. of tin, and from 1/4 to 1/2 oz. of lead increases its malleability and makes it more fluid. These proportions are to the pound of mixed brass.