1968 & 1988 Olympics Medals Set

• Bronze - An alloy of copper and tin, traditionally in the proportions of about 9 parts of copper to 1 part of tin.
  
  The discovery of bronze in Western Asia in the 4th century enabled people to create metal objects which were superior to those previoulsy possible because of its strength and hardness, and it has been used throughout the world for weapons, coins, tools, statuary and other decorative items.
  
  It is very fluid in a molten state, and its hardness, strength when set, and non-corrosive properties makes it most suitable for casting sculpture.
• Foxing - Foxing is a type of discoloration or staining that occurs on the edges or pages of old books, manuscripts, and other paper-based materials. The term "foxing" comes from the reddish-brown color of the stains, which is similar to the color of fox fur.
  
  Foxing is caused by a variety of factors, including exposure to moisture, high humidity, and oxidation. Over time, these environmental factors can cause the paper to yellow and develop the distinctive brownish stains. The discoloration can also be caused by pollutants in the air, such as smoke and chemicals, or by the presence of certain types of mould or mildew.
  
  Foxing can have a significant impact on the value and appearance of old books and manuscripts, and is often considered a defect. However, some people consider foxing to be a sign of the history and aging of the paper, and view it as a desirable characteristic.

This item has been included into following indexes:

• Olympic Games memorabilia - medals and badges 215
• Olympic Games memorabilia, by city - Grenoble 29