Lapel Pins – Wikipedia

Cloisonné (often called hard enamel) – first choice  for custom lapel pins
Cloisonné lapel pins is used the traditional Chinese cloisonné pin making process. Since most of the pins (so I hear) is manufactured in China, in a sense, this lapel pin of the production process, only to come to their place of origin system for the elections.
The main characteristics of cloisonné brooch vibrant color, smooth surface. If cloisonné add the Epoxy on the surface, then add a layer, pins will be more dazzling, but also as a general crystal jewelry. Such pins are really superb in Need. But because the color enamel material is limited, so now the market is generally used instead of color paste liquid enamel imitation enamel material, do the effects come out with cloisonné is the same. 
soft enamel – Runner-up
If you do not have the first process, then soft enamel is a very good choice, and it  use is very extensive. This pin is very strong three-dimensional surface is uneven, sunken Department is filled Pantone pigment to highlight the protruding wire, make pins more sense contours. 
die struck – third
The first two of these pins and insignia do not need to enter the main difference is the color material. Convex or a fine metal wire, concave groove Department of the original coloring is used in place of discharge or frosted effect. Make them look neater. Many highly collectible pins are to do with stamping out, but usually gold or silver material like.
Silkscreen printing – Cheapest option
Usually your economic budget not too high, or more complex designs will choose this process. This process is like the same photos printed on pin logo to the surface, for the protection of designs will add a layer of transparent resin, pin slight muster.
All in all there are several types of pins, select the types of processes entirely up to you. Of course, you can also go to those professional lapel pins site up for reference, choose the most appropriate emblem.