The CPI takes a constant basket of goods and sees how the price changes from year to year. If the price of the basket of goods increases, then there is price inflation. If the price of the basket of goods decreases, then there is deflation.
Copper and tin mainly make up bronze but other elements include phosphorus, manganese, silicon and aluminium.
Bronze is an alloy of copper and usually tin as the main additive that is much harder and more brittle than brass. The term âbronzeâ is sometimes used interchangeably for different types of copper alloys, but the most common typically refers to a mix of about 90% copper and 10% tin in its âpureâ form. Common additives to bronze include phosphorous to harden bronze and lead to make bronze more castable.