Legends
Each key on a keyboard bears a legend identifying the letter, symbol, or function it activates. These legends are usually applied using one of three technologies:
Double-shot keycaps have the legend molded in. Making each keycap is a two-step process. Black plastic is molded into the inner shape of the keycap that attaches to the switch mechanism. The legend protrudes from the top of this inner cap. Then light plastic is molded over and around the inner cap with the legend showing through the top.
Using the double-shot technique, each keycap for each key is a separate and different part that must be individually installed in the correct position on the keyboard as the final step in the production process. Assembly is complex, and stock-keeping ...
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