Mu 1951, kampani ya 3M ku United States inapanga mapepala otentha, patatha zaka zoposa 20, chifukwa vuto la teknoloji ya chromosomal silinathetsedwe bwino, kupita patsogolo kwakhala kochepa.Kuyambira m'chaka cha 1970, kusintha pang'ono kwa zinthu zomwe zimakhudzidwa ndi kutentha, kukweza makina a fax ndi kupanga utoto watsopano wopanda utoto zakhala zikuyenda bwino.Mapepala otenthetsera amagwiritsidwa ntchito pojambula zithunzi, zogwiritsira ntchito pakompyuta ndi zosindikizira.
Pafupifupi theka lazaka zotsatira, ndikutukuka kwachuma chamsika, kugwiritsa ntchito mapepala otentha kwagwiritsidwa ntchito pang'onopang'ono pamahotela ogulira mahotela, kusindikiza maoda obweretsera, zilembo zofotokozera, zolemba za tiyi wamkaka ndi magawo ena.
Ndiye mapepala otentha amapangidwa bwanji?
Choyamba, m'pofunika ntchito m'munsi pepala ndi ndi coarse tinthu kukula woyamba precoating, kupanga precoating woyamba;Pambuyo kuyanika, ❖ kuyanika ndi kukula bwino tinthu ntchito kwa yachiwiri chisanadze ❖ kuyanika, kupanga yachiwiri chisanadze ❖ kuyanika;Pambuyo kuyanika kachiwiri, yachiwiri chisanadze ❖ kuyanika pamwamba ❖ kuyanika, mapangidwe pamwamba ❖ kuyanika, potsiriza, pepala mpukutu kungakhale.
Nthawi yotumiza: Jul-25-2022