Cleans copper, bronze, nickel and brass without harsh chemicals All natural ingredients will not damage coins Turns months of soaking into hours of soaking for Ancient Coins Strong enough to remove tough verdigris and corrosion Re-usable & less expensive than most cleaners A SMART ALTERNATIVE TO CHEMICALS Conceived and developed as an alternative to harsh, chemical and expensive cleaners, Mint State uses a combination of natural cleaning ingredients, perfectly blended to clean quickly and effectively, without damaging your coins. The formula for Mint State was tested thoroughly using real coins by experts in numismatics and ancient artifact restoration. Simply follow the easy instructions for your coin type, and you will achieve the results you want for your coin, fast. It even will help restore the patina on bronze and copper coins when following instructions. Mint State is 100% natural, non-toxic, and non-hazardous There are no man-made chemicals in Mint State cleaner. Most coin cleaners contain some seriously harsh ingredients that can not only harm your coins, but can also harm you, your family, and your pets - not to mention the environment. Mint State is a safe, responsible alternative to chemical cleaning methods. Mint State works fast, strong, easily, and safely If you are like me, you want a cleaner that is quick, easy, effective and safe to use. Chemicals, machine tools, and scrubbing all work, but you either have to wait, risk damaging your coins, or risk exposure to chemicals. You may have also tried using olive oil - soaking your coins for weeks or months, only to find them darkened, with hardly any actual results. Mint State cleans without the consequences…Oh, don't even try electrolysis - you will ruin your coins!