(1) Duk nau'ikan kaya suna da wasu halaye. Kayayyakin magunguna da kayayyakin nishaɗi, kayan abinci da kayan masarufi, kayan shafawa da al'adu da kayan ilimi suna da bambancin sifa mafi girma. Hakanan ana iya bambanta nau'ikan samfuran. Misali, akwai nau'ikan kayan hada magunguna, kamar su maganin gargajiya na kasar Sin, likitancin yamma, maganin warkewa, maganin cutar tonic da sauran magunguna. A wannan batun, ya kamata a bi da sarrafa launi daidai. Ya kamata a shigar da abubuwa masu ma'ana na launi (na zahiri, na ɗabi'a, na halin ɗabi'a), kuma ya kamata a himmatu don aiwatar da ɗabi'un mutum. Misali, ja, lemo da launin rawaya launuka ne masu motsawa sosai, wanda zai iya sanya kwakwalwar ɗan adam a cikin yanayi na farin ciki, faɗaɗa lafazin, da hanzarta bugun zuciya. A cikin tsarin marufi na kayan kwalliya, bitamin, rheumatism da sauran kwayoyi, ana iya amfani da ja da sauran launuka masu jan hankali yadda yakamata. Raƙuman ruwa kore da shuɗi suna nuna annashuwa da nutsuwa, don haka ana amfani dasu don ƙirar marufi na kwantar da hankali, ƙoshin lafiya, tsinkaye, antipyretic da magungunan analgesic.

(2) Saboda yawan samfuran da ke ƙaruwa da kuma gasa mai ƙarfi a cikin kasuwa, aikin gani na marufi na tallace-tallace yana da mahimmanci a cikin talla, daga cikinsu aikin sarrafa launi shine mahimmin al'amari. Nuna duhun kai da rashin tasirin tasirin launi kawai yana da mummunan tasiri, don haka dole ne mu mai da hankali ga sabo da alaƙar da ke tsakanin yanayin launi.

(3) Kadai

Color Launi na musamman: wasu launuka a cikin ƙirar marufi ya kamata ya zama daidai da launi gwargwadon halayen su, amma launin hoton ba haka yake ba. Masu zane-zane galibi suna sabawa hanya kuma suna amfani da launuka marasa mahimmanci don sanya jakar kayayyakinsu ta fita daban daga irin magungunan. Maganin wannan launi yana ƙara mana ƙwarewa da burgewa.

② Shahararren launi: launi mai salo, launi ne wanda yayi daidai da yanayin zamani, kuma shine launi na ƙi kai tsaye da salon zamani. Sako ne na masu zane da kuma siginar kasuwancin kasa da kasa. Lokacin da wani yanayin launi ya zama gama gari, ba shi da sabon kuzari da kwarjini, kuma yana buƙatar fasalin gani daban, wanda aka kwaikwayi kuma sanannen sake. Amfani da shahararrun launuka cikin ƙirar marubuta ta zamani ya kawo fa'idodin tattalin arziƙi ga samfuran. 'Yan kasuwa suna ba da fifiko ga matsayin launi. Shahararrun launuka da mashahuran mashahuran launi na duniya ke bayarwa kowace shekara ana gabatar da su daidai da halaye na zamani kamar halin duniya, kasuwa da tattalin arziki. Manufar ita ce daidaita zuciyar mutane da yanayi, don samar da yanayi mai laushi ga mutane don faranta musu rai.

(4) Sauye-sauye na hankali wadanda hangen nesa launin kasa ya samar suna da matukar rikitarwa. Sun bambanta gwargwadon lokaci da yankuna, ko kuma sun bambanta sosai gwargwadon hukuncin mutum. Dangane da yanayin zamantakewar jama'a, yanayin tattalin arziki, yanayin rayuwa, al'adun gargajiya, al'adu da mahalli na al'ada, kasashe da ƙasashe daban-daban sun kirkiro al'adun launuka daban-daban.