Cov khoom siv raw ntawm matcha yog ib hom tshuaj yej me me uas tsis tau dov los ntawm atshuaj yej rolling tshuab. Nws muaj ob lo lus tseem ceeb hauv kev tsim khoom: npog thiab steaming. Txhawm rau tsim cov matcha zoo, koj yuav tsum npog lub caij nplooj ntoos hlav tshuaj yej nrog cov ntaub thaiv npog thiab cov ntaub qhwv straw 20 hnub ua ntej xaiv, nrog rau qhov ntxoov ntxoo ntau dua 98%. Yog tias npog nrog cov ntaub qhwv yas dub, qhov ntxoov ntxoo tuaj yeem ncav cuag 70 ~ 85%. Cov kev sim tau ua pov thawj tias kev siv cov khoom sib txawv thiab cov xim rau ntxoov ntxoo muaj qhov sib txawv.

"Npog thiab shading hloov ib puag ncig yam xws li lub teeb siv, lub teeb zoo, kub, thiab lwm yam, yog li cuam tshuam rau kev tsim tshuaj yej aroma zoo. Open-air tshuaj yej tsis muaj B-santalol. Ntxiv nrog rau cov ntsiab lus siab dua ntawm qib qis aliphatic tebchaw, cov ntsiab lus ntawm lwm yam aroma Cheebtsam Tsis tas li ntawd qis dua ntxoov ntxoo tshuaj yej ".Lub chlorophyll thiab amino acids ntawm lub npog ntsuab tshuaj yej hmoov av los ntawm lubmatcha grinderyog nce ntxiv. Cov carotenoids yog 1.5 npaug ntawm qhov qhib-cua cog qoob loo, tag nrho cov amino acids yog 1.4 npaug ntawm lub teeb pom kev zoo, thiab cov chlorophyll yog 1.6 npaug ntawm kev cog qoob loo ntuj.

Cov nplooj tshiab tshiab tau khaws thiab qhuav rau tib hnub, siv asteam tshuaj yej fixation tshuab. Thaum lub sij hawm steaming txheej txheem, cis-3-hexenol, cis-3-hexene acetate, linalool thiab lwm yam oxides nyob rau hauv cov tshuaj yej nplooj nce ho, thiab ib tug loj npaum li cas ntawm A-ionone thiab B-ionone raug tsim. Ketones thiab lwm yam ionone tebchaw, lub precursors ntawm no aroma Cheebtsam yog carotenoids, uas pab txhawb rau tshwj xeeb aroma thiab saj ntawm matcha.