Kupanga ndi kupanga duplex board yokhala ndi kumbuyo koyera

Kumapeto kwa zaka za m'ma 1900, ndi kusintha ndi zofuna za chuma msika, owerenga ambiri anafunsa ngati n'zotheka kupanga duplex bolodi ndi woyera kumbuyo amene khalidwe ndi pakati pamatabwa a minyanga ya njovu ndi imvi-backed duplex board. Pambuyo pa miyezi iwiri ya kafukufuku wamsika, kusintha kwa ndondomeko ya mkati ndi kupanga kafukufuku wotheka, akukhulupirira kuti amatha kupanga bolodi yoyera kumbuyo. Kukula kwa duplex board yokhala ndi kumbuyo koyera sikungochepetsa mpikisano wowopsa pamsika womwe ulipo wa imvi, komanso kupititsa patsogolo phindu lazachuma, ndikusintha njira yopangira imvi kuti ikhale yoyera-backed duplex board popanda kufunikira kwakukulu. Investment , adzatha kusintha kupanga.

Konzani makina omenyera kaye, pangani mzere watsopano woyenga, ndikugula zida zapamwamba zoyenga, mphero zitatu zama disks awiri ndi zida zoyezera kwambiri. Pambuyo pofufuza ndi kukambirana, njira yoyeretsera inadziwika mwamsanga, kotero kuti khalidwe ndi chiŵerengero cha kuyeretsa sizingangokumana ndi zamkati, komanso kuonetsetsa kuti zamkati zapansi zimakhala zabwino.

Kusankha mitundu ya zamkati: sankhani mtundu wa Canada Sun waulusi wautali wothira matabwa kuti ukhale ulusi wapakatikati komanso wautali, sankhani zopangira tokha zowulitsidwa komanso zodzipangira tokha za udzu waufupi waulusi, sankhani zinyalala zotayira zamkati zamaso, pepala lotayirira ndi pepala la Daolin pachimake. zamkati Kwa zamkati zosakanikirana, maziko oyera amkati amapangidwa ndi athuokha, ndipo zamkati zoyera ndizochokera ku Indonesian Tiger brand bleached broadleaf zamkati, chifukwa mtundu wa mtundu wa Tiger ndi wabwino kuposa mtundu wa Chiwombankhanga. Izi ndi kukwaniritsa zofunikira, mtengo wake ndi wotsika. Chifukwa chake sankhani mtundu wa Indonesian Tiger broadleaf zamkati ngati maziko.

Mndandanda wamtundu wa zoyera-backduplex board  opangidwa popanga mayeso afika pagulu loyamba, ndipo atha kufananizidwa ndi mtundu wa Baima waku South Korea. Pambuyo mayesero ndi owerenga osiyanasiyana, akhoza kwenikweni kufika khalidwe la kunja woyera-backed duplex board . Kukula kwaduplex board yokhala ndi kumbuyo koyera ndi bwino, amene osati bwino phindu la zachuma, komanso amadzaza akusowekapomsika.