four-colour process

noun
🔊/ˌfɔː ˌkʌlə ˈprəʊses/
🔊/ˌfɔːr ˌkʌlər ˈprɑːses/
(US English four-color process)
(specialist)
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  1. a way of producing colours that look natural in photographs and printing using colour separation四色分色制版法