Pin on a metal base (stainless steel or brass) with text or illustration in offset
printing + finishing with a transparent protective layer = epoxy resin.
The most common solution, especially for designs with a lot of small and fine
details and colors in shades.
Pin on a metal base with soft enamel colors. Unified colors, strictly separated by
a fine rim in raised metal. The enamel colors are slightly recessed. Finishing with
or without an epoxy layer.
Pin on a metal base with colors in soft cloisonné = similar to soft enamel but a
more expensive production method where the surface of the pin is more even,
no level difference between the colored surfaces and the metal rim.
Metal pin, engraved and/or cut out shape without color
A combination of different production techniques f.ex. enamel background