Waddamada ay ka mid yihiin Bahamas, Filibiin, Hindiya, Afgaanistaan iyo dalalka kale ee dukumentiga jinsiyadda aan had iyo jeer la jaan qaadin ama aan la haynin. Isticmaalka khad doorashada si loo diiwaangeliyo codbixiyeyaashu waa hab waxtar leh.
Khadka doorashada waa khad semipermanent ah iyo sye oo sidoo kale loo magacaabay khad nitrate silver ah. Waxa markii ugu horreysay la isticmaalay doorashadii Hindiya 1962 taasina waxay ka hortagi kartaa codbixinta khiyaanada ah.
Qaybaha ugu muhiimsan ee khad doorashadu waa nitrate qalin ah kaas oo diiradda saaraya inta u dhaxaysa 5% -25% guud ahaan, wakhtiga haynta ee daabacaadda maqaarka ayaa u dhiganta fiirsashada nitrate-ka qalinka ah, xoojinta sare ee feejignaanta ayaa keenaysa waqti dheeri ah.
Inta lagu guda jiro doorashada, codbixiye kasta oo dhammeeyo codka waxaa mari doona qalin by shaqaalaha isticmaalay buraash ciddiyihii gacanta bidix. Marka khad leh nitrate silver taabto borotiinka maqaarka kaas oo yeelan doona falcelin midabaynta, ka dibna ka tagayaa meel aan ka saari karin saabuun ama dareere kale oo kiimiko ah. Sida caadiga ah waxay ku haynaysaa 72-96h on cuticle iyo haddii aad maqashid ku hayn doonaa ciddi, taas oo ka saaraysa 2 toddobaadka cusub. ciddi baa kortay.
Tani waxay si weyn u yaraysay dhacdooyinka caddaalad-darrada ah sida musuqmaasuqa doorashada, dammaanad qaadka xuquuqda cod-bixiyayaasha, iyo kor u qaadista hab-dhaqanka dadweynaha ee hawlaha doorashada.
Waqtiga boostada: Juun-17-2023