Muaj ntau ntau cov ntawv tshaj tawm rau kev ntim luam ntawv, xws li concave printing, convex printing, lithography thiab phaj luam ntawv.
Saib ze ntawm luam ntawv kuj tseem tuaj yeem txiav txim siab seb hom ntawv luam ntawv twg yog nws cov tsos. Tus number case luam tawm nyob rau hauv txoj kab raug teeb tsa, yog concave tooj liab phaj los yog concave steel phaj luam ntawv, vim tias feem ntau ntawm cov kua pleev concave tau muab ntim rau hauv qhov sib sib zog nqus, yog li ntawd tus number case tuab dua. Daim duab yog vaguely them nrog dawb-kab square daim ntaub, thiab tsaus xim number case yog tuab, ci number case lub teeb, yog qhov dog dig photographic gravure luam.
Yog vim li cas vim li cas yuav muaj kab dawb square daim ntaub vaguely puv ntawm daim duab, vim hais tias lub phaj-ua lub sijhawm nrog lub tanning ntxaij kab, los tiv thaiv cov luam ntawv riam yuav luam tawm hauv qhov zawj ntawm tus number case scraped tawm. Daim ntawv tom qab ntawm luam tau muaj cov ntawv luam tawm me ntsis, kab lossis ntug ntawm lub dot yog zoo huv si, thiab tus number case nyob hauv nruab nrab ntawm lub teeb, yog cov ntawv convex. Qhov cim tsa npoo sawv yog qhov hnyav thiab yog li ntawd tau me ntsis tsa ceg.
Hwj, saum npoo thiab dav dav Circuit Court board luam ntawv, ntau lub qhov luam ntawv. Kev luam ntawv kuj tuaj yeem faib ua qhov ncaj ncaj thiab tsis ncaj ncees. Kev luam ntawv ncaj qha yog txheej txheej ntawm number case thiab cov khoom raug luam tawm sib cuag, luam ntawv luam tawm hloov mus rau luam. Kev luam tawm ncaj qha yog txheej txheej ntawm number case luam ntawv yuav tsum hloov mus rau cov roj hmab nruas, thiab tom qab ntawd los ntawm cov roj hmab nruas txav cov number case rau cov khoom siv luam ntawv. Cov ntawv luam tawm ncaj qha, luam tawm rau daim duab thim rov qab, kev luam ntawv ncaj qha, luam ntawv rau daim duab.
Kev ntim luam tawm cuam tshuam txog kev paub yog ntau heev, kev faib tawm kuj yog ntau. Cov ntim uas peb pom txhua txhua hnub yog nyob rau hauv cov thawv ntawv, lub raj mis, poom, lossis lub thawv xim. Cov ntawv luam tawm muaj ntau yam dhau los tsim lub thawv ntawv xim.