Thaum nws los txog rau ntim kas fes, tshwj xeeb roasters yuav tsum xav txog ntau yam, xws li xim thiab cov duab mus rau cov ntaub ntawv thiab cov khoom siv ntxiv.Txawm li cas los xij, ib qho tseem ceeb uas qee zaum tsis saib xyuas yog qhov loj.
Qhov loj ntawm lub ntim tuaj yeem muaj qhov cuam tshuam loj heev tsis yog rau lub freshness ntawm kas fes, tab sis kuj rau nws cov yam ntxwv tshwj xeeb xws li cov tshuaj tsw qab thiab cov ntawv sau.Tus nqi ntawm qhov chaw nyob ib ncig ntawm lub kas fes thaum nws ntim, tseem hu ua "headspace," yog qhov tseem ceeb rau qhov no.
Hugh Kelly, Tus Thawj Saib Xyuas Kev Kawm ntawm Australia-based ONA Coffee thiab 2017 World Barista Championship finalist, tau tham nrog kuv txog qhov tseem ceeb ntawm pob kas fes qhov ntau thiab tsawg.
Headspace yog dab tsi thiab nws cuam tshuam li cas rau freshness?
Tsuas yog lub tshuab nqus tsev ntim kas fes, feem ntau ntawm cov khoom ntim tau yooj yim muaj qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob.
Lub taub hau yog qhov tseem ceeb hauv kev khaws cov khoom tshiab thiab tswj cov kas fes zoo, nrog rau kev tiv thaiv kas fes los ntawm kev tsim lub cushion ncig cov taum.Hugh Kelly, peb lub sij hawm Australia Barista Champion hais tias "Cov neeg ua mov ci yuav tsum paub tias qhov chaw ntau npaum li cas saum lub kas fes hauv lub hnab," hais.
Qhov no yog vim qhov tso tawm ntawm carbon dioxide (CO2).Thaum kas fes yog ci, CO2 accumulates nyob rau hauv lub porous qauv ntawm taum ua ntej maj mam khiav nyob rau hauv ob peb hnub tom ntej no thiab lub lis piam.Tus nqi ntawm CO2 hauv kas fes tuaj yeem cuam tshuam txhua yam ntawm aroma mus rau cov ntawv sau.
Thaum kas fes tau ntim, nws yuav tsum muaj qhov tshwj xeeb ntawm chav rau CO2 tso tawm los daws teeb meem thiab tsim cov pa roj carbon ntau.Qhov no pab ua kom lub siab ntawm cov taum thiab cov cua hauv lub hnab ruaj khov, tiv thaiv kev sib kis ntxiv.
Yog hais tias tag nrho cov CO2 yuav dheev khiav tawm ntawm lub hnab, kas fes yuav degrade sai sai thiab nws lub neej txee yuav txo qis heev.
Txawm li cas los xij, muaj qhov chaw qab zib.Hugh tham txog qee qhov kev hloov pauv uas tuaj yeem tshwm sim hauv cov khoom ntawm kas fes thaum lub thawv taub hau me me dhau: "Yog tias lub taub hau nruj dhau thiab cov pa roj los ntawm kas fes yog hnyav hnyav nyob ib puag ncig cov taum, nws tuaj yeem cuam tshuam qhov zoo ntawm kas fes, ”nws piav qhia.
"Nws tuaj yeem ua rau kas fes saj hnyav thiab, qee zaum, me ntsis smokey."Txawm li cas los xij, qee qhov ntawm qhov no tuaj yeem nyob ntawm qhov profile ci, vim tias lub teeb ci thiab nrawm tuaj yeem cuam tshuam txawv. "
Tus nqi ntawm degassing tuaj yeem cuam tshuam los ntawm qhov ceev ceev.Kas fes uas tau roasted ceev yuav khaws tau CO2 ntau dua vim nws muaj sij hawm tsawg dua kom khiav tawm thoob plaws hauv txoj kev roasting.
Dab tsi transpires li headspace expands?
Lawm, headspace nyob rau hauv lub ntim yuav nthuav raws li cov neeg muas zaub haus lawv kas fes.Thaum qhov no tshwm sim, cov roj ntxiv los ntawm cov taum cia kom diffuse rau hauv cov huab cua ib puag ncig.
Hugh qhia cov neeg kom txo qis lub taub hau thaum lawv haus kas fes thiaj li khaws tau qhov tshiab.
"Cov neeg siv khoom yuav tsum xav txog lub taub hau," nws hais."Lawv yuav tsum txwv lub taub hau kom txwv tsis pub nws tawm mus ntxiv, tshwj tsis yog cov kas fes tshwj xeeb tshiab thiab tseem tsim CO2 ntau.Ua kom tiav qhov no, deflate lub hnab thiab ruaj ntseg nws siv daim kab xev.
Ntawm qhov tod tes, yog tias kas fes tshwj xeeb yog tshiab, nws yog qhov zoo tshaj plaws kom tsis txhob muaj lub hnab ntim ntau dhau thaum cov neeg siv kaw vim tias qee cov roj tseem xav tau qhov chaw nkag mus rau thaum nws tawm ntawm cov taum.
Tsis tas li ntawd, txo lub taub hau pab txo cov pa oxygen hauv lub hnab.Cov pa oxygen uas nkag mus rau hauv lub hnab txhua zaus nws qhib yuav ua rau kas fes poob nws cov aroma thiab hnub nyoog.Nws txo qis qhov tshwm sim ntawm oxidation los ntawm kev nyem lub hnab thiab txo cov cua nyob ib puag ncig lub kas fes.
Xaiv lub pob tsim nyog rau koj kas fes
Nws yog ib qho tseem ceeb rau cov roasters tshwj xeeb kom paub tseeb tias lub taub hau ntawm lawv cov ntim yog ob qho tib si me me kom tswj tau qhov tshiab thiab loj txaus kom tsis txhob hloov cov yam ntxwv ntawm kas fes.
Txawm hais tias tsis muaj cov txheej txheem nyuaj-thiab-ceev ceev rau cov nqi ntawm lub taub hau kas fes yuav tsum muaj, raws li Hugh, lub tshuab ci ci yog lub luag haujlwm rau kev sim los txiav txim seb qhov twg zoo rau txhua yam ntawm lawv cov khoom.
Tib txoj kev rau cov roasters los txiav txim seb tus nqi ntawm lub taub hau puas haum rau lawv cov kas fes yog ua ib sab-los-sab tastings, raws li nws.Txhua lub roaster siv zog los tsim kas fes nrog ib qho tshwj xeeb tsw profile, extraction, thiab siv.
Hauv kev xaus, qhov hnyav ntawm taum nyob rau hauv txiav txim qhov loj ntawm cov ntim.Cov ntim loj dua, xws li hauv qab tiaj tiaj lossis sab gusset hnab, tej zaum yuav tsim nyog rau cov taum ntau ntau rau cov neeg yuav khoom.
Cov khw muag khoom kas fes feem ntau hnyav 250g rau cov neeg siv hauv tsev, yog li sawv ntsug lossis plaub lub hnab ntim khoom yuav tsim nyog dua.
Hugh qhia tias ntxiv lub taub hau ntxiv "tej zaum… yuav muaj txiaj ntsig zoo vim tias nws [yuav]...lighten [lub kas fes] yog tias koj muaj kas fes hnyav dua [nrog rau qhov tsaus nti] ci profile."
Lub taub hau loj dua, txawm li cas los xij, tej zaum yuav muaj teeb meem thaum ntim lub teeb lossis nruab nrab ci, raws li Hugh hais tias, "Nws yuav ua rau [lub kas fes] rau hnub nyoog ... sai dua."
Degassing li qub yuav tsum tau ntxiv rau hauv kas fes hnab thiab.Ib txoj kev vents hu ua degassing li qub tuaj yeem muab ntxiv rau txhua hom ntim khoom thaum lub sijhawm lossis tom qab tsim khoom.Lawv tiv thaiv cov pa oxygen nkag mus rau hauv lub hnab thaum tso cai rau CO2 khaws cia kom dim.
Txawm hais tias feem ntau tsis quav ntsej qhov tseem ceeb, qhov loj ntawm lub ntim yog qhov tseem ceeb rau kev tswj xyuas qhov tshiab thiab qhov tshwj xeeb ntawm kas fes.Kas fes yuav tig mus rau qhov qub yog tias muaj ntau dhau los yog qhov chaw me me ntawm cov taum thiab cov ntim khoom, uas tuaj yeem ua rau "hnyav" qab.
Ntawm Cyan Pak, peb lees paub tias nws tseem ceeb npaum li cas rau cov kws ua zaub mov tshwj xeeb kom muab lawv cov neeg siv khoom zoo tshaj plaws kas fes.Peb tuaj yeem pab koj tsim cov ntim ntim zoo tagnrho rau koj lub kas fes, txawm tias nws yog taum lossis hauv av, nrog kev pab los ntawm peb cov kev pabcuam tsim qauv thiab kev hloov pauv hloov tau tag nrho.Peb kuj muab BPA-dawb, tag nrho recyclable degassing li qub uas haum tidily hauv hnab.
Tiv tauj peb kom paub ntau ntxiv txog peb cov khoom ntim kas fes ib puag ncig.
Post lub sij hawm: May-26-2023