How playing cards are made - GIF

How playing cards are made.

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Previously:

Antique playing card trimmer - photo
Glow in the dark playing cards - GIF
Playing card shuffling machine - GIF
Separating newly printed playing cards - GIF
WWII playing card deck with hidden escape map - photos
Windows error playing cards - photo

Why all the slitting and trimming when a die cutter could do all the cutting in 1 simple operation?