Carnival glass is made by pressing extremely hot glass into a glass making mold to form its shape. Colors and salts that are metallic are added to this extremely hot glass to develop a special shade or color.
Too many companies were flooding the market with replicas of the original carnival glass so customers lost interest in it. When this happened, companies decided to sell their glass to carnivals. These carnivals gave away blue carnival glass along with other colors of carnival glass for prizes.
Today, carnival glass is very collectible. There are many pieces of blue carnival glass that collectors seek after everday. Some collecters are searching for one interesting type of this blue glass to collect while others will collect all of the many different types.