Matumba a kraft amanyamula mapepala opangidwa ndi pepala lonse lamatabwa.Kotero mtunduwo umagawidwa kukhala pepala loyera la kraft ndi chikasu pa pepala la kraft.

PP filimu angagwiritsidwe ntchito pa pepala kuteteza ku madzi.Kuphatikizana, kusindikiza ndi kupanga thumba.Njira zotsegulira ndi kumbuyo zimagawidwa kukhala kusindikiza kutentha, kukulunga pamapepala ndi edging.

Ponena za thumba loyamba logulira mapepala a kraft, linabadwa mu 1908 ku St. Paul, Minnesota, USA.Mwiniwake wina wa golosale wa m’deralo, Wald Duvena, wayamba kufunafuna njira zololeza ogula kugula zambiri nthawi imodzi kuti akweze malonda.Duvina amakhulupirira kuti iyenera kukhala thumba lopangidwa kale lomwe ndi lotsika mtengo komanso losavuta kugwiritsa ntchito, ndipo limatha kunyamula pafupifupi mapaundi 75.

Pambuyo poyesera mobwerezabwereza, adatseka mawonekedwe a thumba ili pa pepala la kraft chifukwa linapangidwa kuchokera ku ma conifers okhala ndi ulusi wautali wamatabwa, ndipo adachiritsidwa ndi mankhwala owopsa a caustic soda ndi alkali sulfide panthawi yophika, kupanga mphamvu yoyambirira ya matabwa a nkhuni. osawonongeka pang'ono, kotero pepala lomaliza lomwe limapangidwa limalumikizidwa mwamphamvu ndi ulusi, ndipo pepalalo ndi lolimba ndipo limatha kupirira zovuta zazikulu komanso kupanikizika popanda kusweka.

Patatha zaka zinayi, thumba loyamba la kraft logulira linabadwa.Pansi pake ndi amakona anayi ndipo ali ndi voliyumu yokulirapo kuposa matumba apepala a V-pansi.Chingwe chimadutsa pansi ndi m'mbali mwake kuti chiwonjezere mphamvu yake yonyamula katundu, ndipo malupu awiri amapangidwa kumapeto kwa thumba la mapepala kuti anyamule mosavuta.Duvena adatcha chikwama choguliracho m'dzina lake ndipo adachipatsa patent mu 1915. Pa nthawiyi, kuchuluka kwa malonda a pachaka a matumba ogulira otere kudaposa 100 miliyoni.

Gulu la Guangdong Chuangxin Packing ndilo kutsogolo kwa makampani opanga zida zamakono ndi kafukufuku ndi chitukuko, kupanga, malonda. Pali zizindikiro monga Yinuo, zhonglan, Huanyuan, T.ronson,Crratrusrtndi ma patent opitilira 30 opangidwa.Chiyambireni kukhazikitsidwa kwake mu 2008, ntchito yamakampani ndi "kupangitsa dziko kukhala lokonda zachilengedwe komanso laubwenzi" ndikudzipereka kukhala mtsogoleri wapadziko lonse pazachitetezo cha chilengedwe - mabizinesi apamwamba 500 padziko lonse lapansi.