Gukora Ingwa yo Gusiga

Tangira na 1 kg y'ingwa yazimijwe (calcium hydroxide, Ca(OH)₂). Ingwa yazimijwe iboneka nk'ifu yumye (hydrated lime) cyangwa nka putty itose (lime putty, imaze ibyumweru cyangwa amezi mu mazi kandi yoroshye kurushaho). Lime putty itanga isura inoze kurusha ifu yumye. Niba ukoresha hydrated lime yumye, yivange n'amazi ahagije ngo ibe igikoma gikomeye maze uyireke ijoro ryose. Hydrated lime isanzwe yarazimijwe; kuyinika bituma putty ikura kandi bikoroshya kuyikoresha. ICYITONDERWA: ingwa yazimijwe ifite alkaline ikomeye (pH 12-13). Ambara gants n'uburinzi bw'amaso. Irinde ko ikora ku ruhu kandi ntuhumeke ifu yumye.

Buhoro buhoro ongeramo amazi kuri lime putty cyangwa ku gikoma cya hydrated lime, ukomeza kuvanga, kugeza uruvange rugeze ku bucucike bw'amata y'inka atavanzweho — yoroshye bihagije ngo isigwe byoroshye ariko itaba amazi gusa. Kuri 1 kg y'ingwa yazimijwe, ubusanzwe bisaba litiro 3-5 z'amazi. Vanga neza maze uyungurure mu kayunguruzo gato kugira ngo ukuremo utubumbe cyangwa uduce tutashongeye. Utubumbe tuzatera imirongo n'isura itangana. Uruvange rugomba kuba rworoshye kandi rumeze kimwe hose.

Ku ngwa yo gusiga ifite ibara, ongera ifu y'irangi ry'ubutaka mu ruvange: yellow ochre ku bara rya kirimu rishyushye, red ochre ku bara ry'iroza rya terracotta, raw umber ku bara ry'ikijuju rishyushye, lampblack ku bara ry'ikijuju rikonje. Irangi ntirigomba kurenga 10% by'uburemere bw'ingwa — irangi ryinshi cyane rigabanya imbaraga zo gufatana. Vanga irangi n'amazi make ribe igikoma cyoroshye mbere yo kurishyira mu ngwa, kugira ngo wirinde utubumbe. Menya ko ingwa yo gusiga buri gihe yuma ifite ibara ryoroheje kurusha uko igaragara itose — gerageza agace gato maze ukareke kume mbere yo kwemeza ibara.

Tosa ubuso bw'urukuta n'amazi meza mbere yo gusiga ingwa — ubuso bwumye bunyunyuza amazi vuba cyane, bikabuza carbonation ikwiye. Siga ingwa mu bipande bito, bingana ukoresheje uburoso bugari bufite ubwoya bworoshye (mu buryo gakondo uburoso bunini buringaniye bw'ubwubatsi cyangwa uburoso bunini buzengurutse bwitwa 'uburoso bw'ingwa'). Kora vuba kandi ntusige inshuro nyinshi ahantu hamwe. Buri gipande kigomba kuba gito cyane — kibonerana iyo gitose. Reka buri gipande cyume amasaha 24 mbere yo gusiga igikurikira. Siga ibipande bito 3-5 kugira ngo ubone isura yuzuye, irabagirana. Igipande kizagaragara gifite amabara atangana iyo gitose ariko cyuma kingana.

Nyuma y'igipande cya nyuma, ingwa ikenera igihe cya carbonation — calcium hydroxide inyunyuza CO₂ mu mwuka maze igahinduka calcium carbonate, igakora ubuso bukomeye bufite ikristalu. Iyi nzira imara ibyumweru 1-4 bitewe n'ubuhehere n'ubushyuhe. Ntusige ku zuba ryinshi ryaka cyangwa mu bukonje bwinshi — ubushyuhe buringaniye (10-25°C) n'ubuhehere runaka bitanga carbonation nziza kurusha. Ubuso bwarangiye ni umweru urabagirana udacyeye nk'uwa chalk (cyangwa ibara ryongewemo) ufite ubujyakuzimu n'imiterere byoroheje byiyongera kuri buri gipande gishya uko imyaka ihita. Ingwa yo gusiga ishobora kongera gusigwa buri mwaka — buri gipande cyongera ku buso bwegeranyijwe.