1. Heerkulka biyaha ee shaaha wax lagu karsado wuu ka duwan yahay
 
shaaha cagaarka ah ee heerka sare ah, gaar ahaan shaaha caanka ah ee cagaarka ah ee leh burooyin iyo caleemo jilicsan, guud ahaan waxaa lagu kariyaa biyo karkaraya ilaa 80 ° C.Haddii heerkulka biyuhu uu aad u sarreeyo, way sahlan tahay in la baabi'iyo fitamiin C ee shaaha ku jira, kafeyntuna si sahlan ayaa loo soo da'ayaa, taas oo keenta in maraq shaaha ah uu noqdo jaalle iyo dhadhanka qadhaadh.
 
b.Marka aad diyaarsanayso shaaha ur udgoon ee kala duwan, shaaha madow, iyo shaaha cagaarka ah ee hooseeya iyo kuwa dhexdhexaadka ah, waa inaad isticmaashaa biyo karkaraya 90-100 ° C si aad u diyaarsato.
 
2. Midabka maraq shaaha waa kala duwan yahay
 
a Shaaha Madow: Midabka maraq shaaha ee shaaha madow waa bunni khafiif ah ama madow madow.
 
b Shaah cagaaran: Midabka maraq shaaha ee shaaha cagaaran waa cagaar cad ama cagaar madow.
 
3. qaabab kala duwan
 
Shaaha madow waa maraq cas caleen cas, taas oo ah tayada tayada lagu sameeyo halsano.Shaaha qallalan midabkiisu waa madow, khafiif ah oo dhadhankiisu macaan yahay, maraqkuna waa casaan dhalaalaya oo dhalaalaya.Waxaa jira noocyo "Gongfu Black Shaaha", "Shaaha madow ee jabay" iyo "Souchong Black Shaaha".
 
b Shaaha cagaaran waa shaaha ugu wax soo saarka badan dalkayga, waxaana iska leh shaahashaah aan khamiir lahaynqaybta.Shaaha cagaaran wuxuu leeyahay sifooyinka tayada ee maraq cad oo caleen cagaaran ah.Shaaha cusub ee jilicsanaanta wanaagsan waa midab cagaar ah, caleemaha ugu sarreeya ayaa muujinaya, midabka maraqkuna waa dhalaalaya.
 
4 Saamayntu sidoo kale way ka duwan tahay
 
a Shaaha madow: Shaaha madow waa ashaah khamiir leh, macaan iyo diirran, qani ku ah borotiinka, waxayna leedahay shaqooyinka abuurista kulayl iyo kululaynta caloosha, caawinta dheefshiidka iyo ka saarida dufanka.
 
b Shaaha cagaaran: Shaaha cagaaran waxa uu hayaa walxaha dabiiciga ah ee caleemaha cusub, waxana uu qani ku yahay walxaha dabiiciga ah sida shaaha polyphenols, caffeine, vitamins iyo chlorophyll.