Coin Chemistry: Including Cleaning and Preservation

This book is a compilation of articles on coin chemistry the author has written over the years which have appeared in popular numismatic publications. Some deal with the cleaning of coins while others address coin preservation. Other topics on coin chemistry are also presented. The data given in the book are based on experimentation. The quantities of sulfur responsible for the diverse coloration on toned silver coins are given in micrograms per square centimeter. The book is a must if one wants to learn about toning and good coin care.