Kev tsim kho thiab tsim tawm ntawm cov xovxwm luam ntawv tau ua lub luag haujlwm tseem ceeb hauv kev sib kis ntawm tib neeg kev vam meej thiab kev coj noj coj ua.
Ua ntej xyoo 1950, cov ntawv sau tshuab luam ntawv li qub tau ua txoj haujlwm tseem ceeb hauv kev lag luam luam ntawv, thiab kev txhim kho ntawm cov tshuab luam ntawv tau loj los ntawm cov tshuab luam ntawv tshuab luam ntawv. Txawm li cas los xij, cov txhuas alloy nyem txheej txheem luam ntawv muaj qhov tsis zoo ntawm kev ua haujlwm siab, lub voj voog ntau lawm ntev thiab kev ua qias tuaj ib puag ncig. Pib hauv xyoo 1960, ua rau cov ntawv luam tawm offset luam ntawv nrog cov voj voog luv sij hawm thiab cov khoom lag luam siab tau pib nce thiab nthuav dav, thiab cov hlau lead nyem luam tawm tau maj mam hloov los ntawm offset printing. Mos nyem tshuab luam ntawv, stencil luam ntawv, luam ntawv electrostatic, luam ntawv inkjet luam ntawv, thiab lwm yam, kuj tau tsim hauv ntim luam tawm thiab luam ntawv luam ntawv.
