Funso: Tili ndi dzungu la nthawi yophukira ngati zokongoletsera patebulo lathu lodyera la maple, lomwe limakutidwa ndi mafuta a linseed okha, omwe timapaka nthawi zonse. Dzungu linatuluka, ndikusiya banga. Kodi pali njira yochotsera izi?
Yankho: Pali njira zingapo zochotsera madontho akuda pamatabwa, koma mungafunike kuyesa njira zingapo zothetsera vutoli.
Kawirikawiri, madontho akuda pamatabwa amayamba chifukwa cha chinyezi chomwe chimakhudzana ndi ma tannins, otchedwa chifukwa cha kuchuluka kwa ma tannins mu makungwa a oak ndi matabwa a oak, omwe akhala akugwiritsidwa ntchito kupukuta chikopa kwa zaka masauzande ambiri. Ma tannins amapezekanso mu zipatso zambiri, ndiwo zamasamba ndi zinthu zina za zomera. Ndi antioxidant, ndipo kafukufuku wambiri waposachedwapa akuyang'ana kwambiri pa zotsatira za kudya zakudya zokhala ndi ma tannin pa thanzi.
Ma tannins amasungunuka m'madzi. Matabwa akanyowa kenako madziwo n’kuphwa, ma tannins amatengedwa kupita pamwamba, n’kusiya ma tannins ochulukirapo. Izi nthawi zambiri zimachitika m’nkhalango zokhala ndi ma tannins ambiri monga oak, walnut, cherry ndi mahogany. Maples ali ndi ma tannins ochepa, koma n’zotheka kuti ma tannins a dzungu pamodzi ndi ma tannins a maple amapanga banga.
Madontho akuda pamatabwa amathanso kuchitika chifukwa cha nkhungu, yomwe imachitika pamene matabwa ali onyowa ndipo pali chakudya cha bowa, chomwe timachitcha kuti mildew kapena mildew. Madzi a botolo la gourd, monga zinthu zina zilizonse zachilengedwe, angagwiritsidwe ntchito ngati chakudya.
Oxalic acid imachotsa madontho a tannin, ndipo chlorine bleach imachotsa madontho a nkhungu. Oxalic acid imaphatikizidwa mu Bar Keepers Friend Cleaner ($2.99 ​​​​pa Ace Hardware), koma kuchuluka kwa oxalic acid mu chidebecho ndi kochepera 10 peresenti, malinga ndi MSDS ya wopanga. Bar Keepers Friend Gentle Cleanser ilinso ndi oxalic acid, koma yocheperako. Ngati mukufuna mawonekedwe osasungunuka, yang'anani zinthu monga Savogran Wood Bleach ($12.99 pa chidebe cha 12-ounce pa Ace) munjira yopaka utoto.
Komabe, oxalic acid ndi bleach ziyenera kukhudzana ndi ulusi wa matabwa kuti zigwire ntchito. Chifukwa chake, akatswiri okonza mipando choyamba amachotsa chophimba pamwamba pogwiritsa ntchito zosungunulira kapena kupukuta. Komabe, n'zoonekeratu kuti bangalo lalowa mu topcoat, kotero mutha kupita ku nsonga za oxalic acid pansipa kuti muwone ngati oxalic acid yokwanira imalowa kuti muchepetse bangalo popanda kuchotsa. Nkhani ina ya pa intaneti yomwe ndapeza ikuwonetsa zithunzi za momwe mungachotsere banga lakuda pamatabwa popanda kuchotsa: Pogwiritsa ntchito phala la magawo awiri a Bar Keepers Friend Cleaner ndi gawo limodzi la madzi, sakanizani kwa mphindi zochepa, kenako gwiritsani ntchito theka la sopo ndi theka la madzi. Pakugwiritsa ntchito kachiwiri, wolemba nkhaniyi adagwiritsa ntchito ubweya wachitsulo wa 0000, koma zikanakhala bwino kugwiritsa ntchito pedi yopangidwa. Ubweya wachitsulo ukhoza kusiya zidutswa m'mabowo a matabwa, ndipo ma tannins amatha kuchitapo kanthu ndi chitsulo, ndikusandutsa matabwa oyandikana nawo kukhala akuda.
Ngati mungathe kuthana ndi banga ndipo mukusangalala ndi zotsatira zake, ndizabwino kwambiri! Koma, mwina simudzapeza mtundu wofanana. Ichi ndichifukwa chake akatswiri amalimbikitsa kuchotsa topcoat ndi kuchiza banga musanayipente.
Pa zinthu zakale, zosungunulira mwina ndiye zochotsera zabwino kwambiri chifukwa kuteteza patina ndikofunikira. Carol Fiedler Kawaguchi, yemwe amapukuta zinthu zakale ndi mipando ina kudzera mu kampani yake ya C-Saw ku Bainbridge Island, Wash., akulangiza kugwiritsa ntchito yankho lomwe lili ndi theka la mowa wosungunuka ndi theka la lacquer thinner. Kuti mudziteteze ku utsi, gwirani ntchito panja nthawi iliyonse yomwe mungathe kapena valani chopumira cha theka la mask chokhala ndi katiriji ya nthunzi ya organic. Valani magolovesi ndi magalasi oteteza mankhwala. Zosungunulirazi zimaphwa msanga, choncho gwiritsani ntchito magulu ang'onoang'ono okwanira kukanda kapena kupukuta pamwamba pake pomata musanaume.
Kapena, Kawaguchi akuti, mungagwiritse ntchito Citristrip Safer Paint ndi Varnish Remover Gel ($15.98 pa lita imodzi ku The Home Depot). Chotsukira ichi chilibe fungo loipa, chimakhala chonyowa komanso chogwira ntchito kwa maola ambiri, ndipo chimalembedwa kuti ndi chotetezeka kugwiritsidwa ntchito m'nyumba. Komabe, monga momwe zilembo zazing'ono pa chizindikirocho zikusonyezera, onetsetsani kuti mpweya wabwino ukuyenda bwino ndipo valani magolovesi ndi magalasi oteteza ku mankhwala.
Ngati mukufuna kupewa kuchotsa mankhwala, kupukuta ndi njira ina yomwe ingakhale yokongola kwambiri pamapulojekiti omwe sagwiritsa ntchito zinthu zakale komanso omwe ali ndi malo athyathyathya opanda mawonekedwe ovuta omwe amapangitsa kuti kupukuta kukhale kovuta. Gwiritsani ntchito chotsukira chozungulira chosasinthika, monga DeWalt Corded 5-Inch Sander yokhala ndi Velcro Attachment ($69.99 pa Ace). Gulani paketi ya sandpaper ya medium-grit ($11.99 pa ma sandpaper 15 a Diablo brand) ndi mapepala ochepa a sandpaper ya fine-grit (220 grit). Ngati n'kotheka, sunthani tebulo kunja kapena mu garaja kuti mupewe matabwa ozungulira. Yambani ndi pepala lapakati. Mafuta a flaxseed amachitapo kanthu ndi mpweya mumlengalenga kuti apange chophimba chonga pulasitiki. Izi zimachitika mwachangu poyamba kenako zimachepa kwa zaka zingapo. Kutengera momwe chophimbacho chilili cholimba, chitha kupukutidwa mosavuta. Kupanda kutero, mikanda yaying'ono yamafuta ingapangidwe pa sandpaper, zomwe zimachepetsa mphamvu yake. Yang'anani sandpaper nthawi zonse ndikuisintha ngati pakufunika.
Mukatsala ndi matabwa opanda kanthu, mutha kuthana ndi banga. Yesani kaye oxalic acid. Chizindikiro cha Savogran chimati sakanizani chidebe chonse cha ma ounces 12 ndi galoni imodzi ya madzi otentha, koma mutha kuchichepetsa ndikusakaniza kotala la zomwe zili mkati ndi lita imodzi ya madzi otentha. Gwiritsani ntchito burashi kuti muyike yankho patebulo lonse, osati banga lokha. Yembekezerani mpaka matabwawo akhale opepuka momwe mukufunira. Kenako pukutani ndi nsalu yoyera, yonyowa kangapo kuti mutsuke pamwamba pake. Katswiri wokonzanso zinthu Jeff Jewitt akunena m'buku lake la Furniture Restoration Made Easy kuti kugwiritsa ntchito kangapo komwe kumakhala ndi maola angapo owuma kungafunike kuti muchotse banga.
Ngati oxalic acid sichotsa banga, yesani kugwiritsa ntchito chlorine bleach pa bangalo ndikulisiya usiku wonse. Ngati mtundu wayamba kuyera pang'ono koma osakwanira, bwerezaninso njirayi kangapo, koma mwina tsiku lonse kuti muthe kuyang'ana nthawi zonse ndikumaliza kukonza matabwa asanayambe kusinthika kwambiri. Pomaliza, yeretsani ndi kuyeretsa ndi viniga woyera wa gawo limodzi ndi magawo awiri a madzi.
Ngati banga likupitirira, muli ndi njira zitatu: Imbani katswiri wokonza; pali bleach yolimba koma yovuta kupeza. Muthanso kuipukuta mpaka banga litachoka kapena kuipukuta mokwanira kuti isakuvutitseni. Kapena konzani kugwiritsa ntchito pakati ngati chowonjezera patebulo lodyera.
Ngati munagwiritsa ntchito oxalic acid kapena bleach, matabwa akauma, ayenera kupakidwa mchenga wochepa kuti achotse ulusi uliwonse womwe wakwezedwa ndi madzi. Ngati simukufuna chotsukira kuti muchotse ndipo mulibe chotsukira, mutha kuchita izi ndi manja pogwiritsa ntchito sandpaper ya grit 220. Chotsani fumbi lililonse losambitsa kenako pukutani pamwamba pake ndi mafuta a linseed kapena china chilichonse.