The length of training for prepress jobs varies by occupation. Typesetting can be learned in a few months but stripping requires years of training. Workers often start as helpers. They are paired with experienced prepress workers who teach them skills. As trainees acquire skills they are given more difficult tasks.
Some prepress workers gain their skills through apprenticeships.
However, the number of apprenticeships offered each year is declining. Apprentices learn all phases of printing but receive intensive training in a specific area.