Translations:AY Honors/Pin Trading - Advanced/Answer Key/62/en
From Pathfinder Wiki
An epoxy dome is a clear plastic coating that can be added as an option to soft enamel or photo etched pins, providing a lustrous shine and adding additional depth to the overall design of the pin. Silk screened and offset printed designs can be very delicate, so these pin types have an epoxy dome which acts as a barrier to protect the pin design from being scratched or scraped off. Disadvantages are that they tend to turn yellow over time, and occasionally they come off.