Peb tsab xov xwm dhau los qhia txog cov ntoo tseem lauj kaub rau rum hauv kev nthuav dav. Ntxiv nrog rau lub lauj kaub distillation, kem distillation kuj yog ib txoj hauv kev distillation hauv rum brewing.
Kem distillation yog qhov peb feem ntau hu ua "kem distillation" thiab "nruam distillation" tam sim no. Ntau cov kab distillation txuas nrog ua ke, uas zoo heev txhim kho cov distillation efficiency. Ntau lub npe nrov rum distilleries tau siv txoj kev distillation no: Wray & Nephew Distillery hauv Jamaica siv peb-kem tseem; Tuam txhab DDL hauv Guyana siv plaub-kem Savar tseem; Bacardi (UK), Cruzan (Tebchaws Meskas), Angostina (Trinidad thiab Tobago), thiab lwm yam. siv tsib-kem tseem. Cov cawv distilled nyob rau hauv kem stills yog sib dua li uas ua nyob rau hauv lub lauj kaub, thiab yog li lub teeb rum tau yug los. Txawm li cas los xij, kev siv cov kem tseem tsis txwv rau lub teeb rum. Muaj zog rum kuj tuaj yeem tsim los ntawm kev siv tshuab. Txawm li cas los xij, txawm hais tias cov cawv txiv hmab distilled muaj tib yam li cov cawv txiv hmab distilled siv lub lauj kaub tseem, qhov tsw txawv. Muaj qhov sib txawv.
Kem tseem tseem tau ua lub luag haujlwm tseem ceeb hauv kev txhim kho ntawm whiskey. Nyob rau hauv lub xyoo pua puv 19, Irishman Aeneas Coffey tau txhim kho qhov tseem ceeb thaum ntxov thiab tsim cov kab txuas txuas ntxiv uas txuas rau kab ntawv txheeb xyuas thiab cov kab ke distillation, tseem hu ua "Coffey tseem." Tsis ntev tom qab lub advent ntawm no kem-hom nruam distiller, nws tau siv los ntawm cov Scots nyob rau hauv zus tau tej cov grain whiskey vim nws zoo ntawm high distillation efficiency thiab tsawg nqi. Nws kuj tau ua rau Scottish blended whiskey maj mam hloov Irish whiskey ua tus tseem ceeb hauv ntiaj teb. Txawm hais tias lub distillation efficiency ntawm lub nruam tseem yog siab dua thiab cov distilled caw yog purer, nyob rau hauv cov nqe lus ntawm lub cev thiab tsw, lub whiskey distilled los ntawm cov nruam kem distillation yog sib dua li cov tsoos lauj kaub tseem.
Nruam distillation siv ib kem tseem yog ib txoj kev siv distillation rau Fabkis brandy ntxiv rau cognac thiab Armagnac. Cognac siv Charente lauj kaub distillation, thiab Armagnac siv ib nrab txuas ntxiv distillation. Feem ntau ntawm lawv yuav tsum tau muab ob npaug rau distillation, thaum tsis tu ncua distillation tsis xav tau ob npaug distillation. Lub brandy distilled los ntawm kev nruam tseem muaj ib tug sib zog saj.
Feem ntau, kem tseem yog tus cwj pwm los ntawm kev ua haujlwm siab thiab tuaj yeem cuam tshuam cov feem sib txawv, tab sis qhov tsis zoo yog tias qhov kawg distilled caw muaj tsawg dua cov tshuaj tsw qab, uas yog cov neeg feem ntau hu ua lub teeb. Lub lauj kaub tseem, ntawm qhov tod tes, muaj qhov ua haujlwm qis dua, tab sis cov ntsiab lus tsw ntawm cov cawv txiv hmab distilled yog ntau dua li ntawm kab tseem. Yog li ntawd, tus nqi ntawm wine distilled los ntawm kem stills feem ntau qis dua cov cawv distilled los ntawm lub lauj kaub. Vim nws qhov kev ua haujlwm siab distillation thiab loj ntau lawm ntim ib lub sijhawm, kem tseem muaj lub luag haujlwm tseem ceeb hauv kev txhawb nqa cov khoom lag luam loj.
