A cikin shayar da shayi na yau da kullun, ayyukan dakin gwaje-gwaje, ko saitunan masana'antu masu zafi, zafi{1} kofuna masu juriya sune zaɓin da aka fi so saboda kyakkyawar isar da haskensu da ƙarfin ƙarfin sinadarai. Koyaya, ingancin samfuran a kasuwa ya bambanta sosai, kuma wasu samfuran masu arha suna da'awar karya "zafi-," wanda zai iya haifar da karyewa cikin sauƙi. ƙware waɗannan wuraren siye masu zuwa na iya taimaka muku guje wa tarko kuma zaɓi samfuran inganci- waɗanda suka dace da bukatunku.
Material maɓalli ne ga tsayin juriyar yanayin zafi; fifiko babban gilashin borosilicate. Irin wannan gilashin ƙunshi 12% ~ 15% boron oxide, yana da thermal fadada coefficient na kawai 3.3 × 10⁻⁶ / digiri , kuma zai iya jure kwatsam zazzabi canje-canje daga -20 digiri zuwa 150 digiri , tare da ci gaba da zazzabi juriya kai 300 ~ 500 digiri , yin amfani da shi da manufa zabi ga gida dakunan gwaje-gwaje. Hattara da kwaikwai da aka yi da gilashin soda{14}}; juriyar zafinsa bai wuce digiri 80 ba, kuma yana fashe cikin sauƙi idan aka fallasa ruwan tafafi. Sau da yawa ana tallata shi a matsayin "gilashin da ke jure zafi" ta 'yan kasuwa marasa mutunci.
Bayanan masana'anta kai tsaye suna ƙayyade aminci da dorewa. Jikin kofin yakamata ya zama mara sumul, ƙira ɗaya{1} don hana tara ƙazanta da tabbatar da ingantaccen tsari. Ya kamata saman ya zama santsi, ba tare da kumfa da fasa ba. Ya kamata a yanke bakin baki da Laser{4}} don gamawa mai zagaye wanda baya kakkaɓe leɓe. Ya kamata kauri na ƙasa ya zama aƙalla 5mm, da kyau tare da zoben silicone mara zamewa don haɓaka juriyar fashewa da rage haɗarin yin tipping. Don samfuran bugu, bangon ciki ya kamata ya zama a fili, kuma bugu na bango dole ne ya zama ƙwararrun FDA ko LFGB don hana leaching na ƙarfe masu nauyi kamar gubar da cadmium a yanayin zafi mai girma.
Ƙayyadaddun samfur dole ne a daidaita daidai da yanayin amfani. Don amfanin gida, zaɓi manyan kofuna na borosilicate masu bango guda biyu{1} don yin shayi da kofi; tazarar iska mafi Girma ko daidai da 5mm yana hana ƙura. Don saitunan dakin gwaje-gwaje, ba da fifiko ga manyan kayan gilashin borosilicate don tabbatar da daidaiton girma da daidaiton sinadarai. Don aikace-aikacen zafi masu girma{{5} kamar tagogin masana'antu, zaɓi samfuran tare da kauri masu dacewa dangane da buƙatun zafin jiki; misali, gilashin quartz da aka yi amfani da shi a cikin yanayin digiri 1200 yana buƙatar kauri mafi Girma fiye da ko daidai da 15mm. Har ila yau, kula da kayan murfin; abinci - silicone daraja yana da juriya da zafin jiki daga -40 ~ 230 digiri, yana ba da ingantaccen tsaro idan aka kwatanta da murfi na filastik na yau da kullun.