Celluloid buttons are made of organic compounds and therefore can breakdown and disintegrate. The most common type of celluloid degradation is caused by camphor gradually working its way out of the product.
The book was "The Button Collector's History" by Grace Horney Ford, 1943.
Sue Farrah shared some of her Glass Buttons.
17- Minute Video Presentation by Sue Farrah of the Ottawa Valley Button Club, Ottawa ON, Canada.
This article by Natalie Warringtonappeard first published in the Ottawa
Here are some buttons for you to enjoy - now