Dziko la ma CV yakulitsa msanga m'zaka zaposachedwa, ndikuwonjezeka kwambiri pakugwiritsa ntchito zida zapamwamba zopangira zinthu. Mwa zinthuzi, matumba okazinga atchuka kwambiri chifukwa chokwanira, kusinthasintha, komanso kugwiritsa ntchito mtengo. Matumba awa amagwiritsidwa ntchito ponyamula zida zingapo, kuphatikiza zikwama za carbonate, matumba a simenti, ndi matumba a gypsum.

Matumba a PP apangidwa kuchokera ku polypropylene, omwe ndi polymoplastic poyint yomwe imagwiritsidwa ntchito pazogwiritsa ntchito zosiyanasiyana. Izi ndizokhazikika, zopepuka, komanso zosagwirizana ndi chinyezi, zomwe zimapangitsa kuti zikhale zabwino kuti zikhale zotetezeka kuti zitetezeke ku malo akunja. Matumba a PP owoneka bwino amasinthasintha, omwe amawalola kuti azigwiritsidwa ntchito pazosiyanasiyana zamawonekedwe osiyanasiyana.

Chimodzi mwazinthu zomwe zimagwiritsidwa ntchito kwambiri za matumba a PP ndiza calcium carbonate, yomwe imagwiritsidwa ntchito ngati zosefera pazitundu zosiyanasiyana, kuphatikiza utoto, pepala, ndi pulasitiki. Matumba omwe amagwiritsidwa ntchito ponyamula calcium carbonate ya carbonate imapangidwa kuti ikhale yolimba komanso yamphamvu, chifukwa izi ndizolemera ndipo zimafunikira chikwama cholimba kuti chiziyenda ndi kusungidwa.

Kugwiritsanso kwina kwa matumba a PP ndikumathamiritsa simenti, yomwe ndi imodzi mwazinthu zomangira zomanga kwambiri padziko lapansi. Matumba a simenti nthawi zambiri amapangidwa kuchokera kuphatikizidwe ndi nsalu yokazinga ndi pepala la Kraft, yomwe imapereka chibwibwi komanso chitetezo chopanda chinyezi. Matumba awa amapezeka mosiyanasiyana, kuyambira m'matumba ang'onoang'ono a ma props a DIY kumatumba akuluakulu omanga malonda.

Matumba a PP chonyowa amagwiritsidwanso ntchito kwa gypsum gypsum, yomwe ndi mchere wofewa wa sulfate womwe umagwiritsidwa ntchito poyimitsa ndi pulasitiki. Matumba a gypsum adapangidwa kuti azikhala opepuka komanso kosavuta kusamalira, monga momwe amagwiritsidwira ntchito m'malo omanga pomwe ogwira ntchito amafunikira kusuntha zinthu zambiri mwachangu komanso moyenera. Matumba awa ndi olimba, omwe amawonetsetsa kuti gypsum imatetezedwa ku malo opezeka kunja ndikukhalabe osasunthika ndikusungira.

Pomaliza, matumba a nsalu ndi chinthu chofunikira kwambiri komanso chosinthasintha m'makampani ogulitsa. Kukhazikika kwawo, kusinthasintha, ndi kugwiritsa ntchito mtengo wake kumapangitsa kuti akhale ndi chisankho chowoneka bwino ponyamula zinthu zosiyanasiyana, kuphatikiza matumba a carbonate, matumba a simenti, ndi matumba a gypsum. Kukula kwa zinthu zapamwamba komanso njira zatsopano zopangira zopangira zidzapitilirabe magwiridwe antchito ndi matumba opanga mapepala okhala, kuwapangitsa kukhala gawo lofunikira la makampani amakono amakono.