Okukola okukala mu vacuum freeze-okujjuvu kulimu emitendera ebiri emikulu: pre-freezing ne sublimation drying. Enkola ya sublimation eggyawo obutafaali bwa ice munda mu bintu, ate nga pre-freezing esalawo engeri y’okusaasaana n’obunene bwa ice crystals nga tezinnaba kukala. Ne bwe kiba nti ekyuma ekikala mu firiigi kikola bulungi mu mutendera gw’okufuumuuka, ebizibu by’omutindo ebiva ku kufuyira okutali kutuufu nga tekunnabaawo -bijja kusigala mu bintu ebiwedde enkalakkalira.
Singa ebbugumu erya pre-freezing liba waggulu okusinga ekintu eutectic point oba obudde bw’okukwata ebbugumu tebumala, amazzi ag’obwereere agali munda mu bigimusa tegasobola kukyusibwa ddala mu ice omugumu. Mu mbeera ya vacuum enkulu, amazzi ag’amazzi agatali ga bbugumu gasaanuuka ne gasenguka, ekivaako okukendeera kw’ebintu, okukaluba kw’okungulu n’okugwa. Ebibala ebirimu ssukaali omungi-nga situloberi, emiyembe bitera okubeera n’ekintu ekinyogoza ennyo. Kungulu kulabika nga kufuuse bbugumu, ate munda mukyalimu ebitundu by’amazzi, ekizibu okusanga ng’oyita mu kwetegereza okwangu.
Sipiidi y’okutonnya nayo ereeta enjawulo eyeeyolese mu mpisa z’ebintu. Okufuumuuka okw’amangu ennyo (ultra-kuleeta omuwendo omunene ogw’obutafaali bwa ice obutonotono. Oluvannyuma lw’okubumbulukuka (sublimation), emikutu gy’obutuli munda mu bintu giba mifunda, ekivaamu sipiidi y’okuddamu amazzi empola mu bintu ebiwedde. Okutonnya empola mu kigero kuyinza okukola ebiwujjo bya ice ebinene. Oluvannyuma lwa ice sublimates, obutuli obugazi busigalawo, mu ngeri ennungi okulongoosa obusobozi bw’okuddamu amazzi. Wabula okutonnya empola ennyo kijja kusaanyaawo ebisenge by’obutoffaali bw’ebintu ebisookerwako, kireetewo omubisi okufuluma n’okufiirwa ebirungo ebikola.
Ebigimusa eby’enjawulo omuli ennyama, enva endiirwa ez’amakoola, obutunda n’ebirime by’ebikoola birina ebifo eby’enjawulo eby’ekika kya eutectic n’engeri z’ebitundu by’omubiri. Tewali parameter ya universal pre-freezing esaanira ebintu byonna. Amakolero ag’ekikugu geetaaga okukola okugezesa enkola entonotono-okusinziira ku biti by’ebintu byabwe nga tebinnaba kukola mu bungi, okunoonyereza ku bbugumu erinywevu n’ebipimo by’okukwata, n’okunyweza ebikoola ebikuze nga tebinnaba kufuumuuka mu nkola y’okufuga.
Tekinologiya erongooseddwa nga tanna-freezing asobola bulungi okukendeeza ku bulema obutera okubeerawo omuli okufuuka browning, okukutukakutuka, okugwa n’okuddamu amazzi mu ngeri embi. Kilongoosa amakungula g’ebintu ebiwedde, kitebenkeza obutakyukakyuka bwa batch-to-batch, kinyweza okuvuganya kw’ebintu mu butale bw’ebweru w’eggwanga, n’okutondawo ekifo ekinene eky’amagoba eri ebitongole ebikola emmere enkalu mu firiigi-.
