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Launuka na coils na karfe masu launi suna da wadata da launi. Yadda za a zabi launin da ya dace da kai a cikin yawancin nau'in nau'i na karfe? Don guje wa bambance-bambance masu mahimmanci, bari mu kalli tare.
Zaɓin zaɓi na launi don rufin farantin karfe mai launi: Babban abin la'akari don zaɓin launi shine dacewa da yanayin kewaye da abubuwan da ake so na mai shi. Duk da haka, daga hangen nesa na fasaha, akwai nau'i-nau'i masu yawa na zabi ga pigments a cikin launi mai launi. Inorganic pigments tare da m karko (kamar titanium dioxide) za a iya zaba, da thermal nuni ikon shafi ne mai karfi (madaidaicin tunani ne sau biyu na duhu launi coatings). A lokacin rani, yawan zafin jiki na murfin kanta yana da ƙananan ƙananan, wanda ke da amfani don tsawaita rayuwar sutura.

Bugu da ƙari, editan yana tunatar da cewa ko da launi ya canza launi ko foda, bambanci tsakanin launi mai launi da launi na asali yana da ƙananan, kuma tasirin bayyanar ba shi da mahimmanci. Launuka masu duhu (musamman launuka masu haske) galibi suna cikin launi, kuma suna saurin dusashewa lokacin da hasken ultraviolet ya fallasa, canza launi cikin watanni uku kacal. Don faranti mai rufin ƙarfe, ƙimar faɗaɗawar thermal na rufi da farantin karfe yawanci sun bambanta, musamman madaidaicin faɗaɗa madaidaicin madaidaicin ƙarfe na ƙarfe da murfin halitta sun bambanta sosai. Lokacin da yanayin zafin jiki ya canza, haɗin gwiwa tsakanin substrate da shafi zai fuskanci faɗaɗawa ko damuwa. Idan ba a sake shi da kyau ba, za a yi fatattakar sutura.

Bugu da ƙari, ya kamata a lura cewa akwai kuskure guda biyu a cikin kasuwa na yanzu: daya shine kasancewar babban adadin farar fata. Manufar yin amfani da farar farar fata shine don rage kauri daga cikin rigar saman, kamar yadda al'ada ta al'ada mai jure lalata don gini shine kore mai launin rawaya (don haka strontium chromate pigment) kuma dole ne ya sami isasshen kauri na topcoat. Na biyu shine amfani da farantin karfe masu launi a cikin ayyukan gine-gine. Irin wannan aikin yana amfani da masana'antun daban-daban da batches na farantin karfe masu launi, waɗanda ƙila za su yi kama da launi ɗaya yayin ginin. Duk da haka, bayan shekaru da yawa na hasken rana, yanayin canza launi na launi daban-daban daga masana'antun daban-daban sun bambanta, suna haifar da bambance-bambancen launi mai tsanani. Akwai misalan wannan da yawa. Ko da samfurori daga mai sayarwa iri ɗaya, ana ba da shawarar sosai don sanya oda don wannan aikin a lokaci ɗaya, kamar yadda lambobi daban-daban na iya amfani da samfurori daga masu samar da fenti daban-daban, suna ƙara yiwuwar bambance-bambancen launi.