Ka taƙaita labarin:  Zane-zanensa suna cikin mafiya daraja a duniya - duk da haka da yawa daga cikinsu suna ɓacewa a hankali. Yanzu masana kimiyya sun gano Vincent Van Gogh ta masterpiece ta fadowa wanda aka azabtar da artist ta zabi na pigments ya yi amfani da a cikin Paint. Sun gano cewa wani abu mai wuya a cikin wani fenti mai launin ja mai launin ja wanda dan wasan Dutch ya yi amfani da shi yana juya fari yayin da ya rushe cikin lu'ulu'u masu launin fari. Gungura ƙasa don bidiyo. Launuka a cikin Van Gogh's masterpiece Sunflowers, nau'i biyu na wanda aka nuna a sama da aka nuna a National Gallery, ana jin tsoron sun canza kamar yadda launin rawaya da ja sun lalace a tsawon lokaci. An gano cewa samfurori daga zane-zanen Van Gogh sun ƙunshi ma'adinan plumbonacrite na tushen gubar wanda ke hulɗa da carbon dioxide a cikin iska. Sun ce wannan ma'adinan shine ɓangarorin da suka ɓace wanda zai iya bayyana dalilin da yasa launin ja ja, wanda aka sani da ƙarami, ya zama fari. Red gubar ba shine farkon launi da za'a samu a cikin aikin Van Gogh wanda ya kasa tsayawa gwajin lokaci. Kwanan nan masu bincike sun bayyana cewa wani ruwan tabki mai launin ja da ya yi amfani da shi ya yi sanyi. Wannan ya sa suka kammala cewa shuɗin irises na Filin sa tare da Irises kusa da Arles, wanda aka zana a cikin 1888, asali launi ne na shunayya. Masu kula da gidan kayan gargajiya na Van Gogh a Amsterdam sun kuma gano cewa launuka a cikin Van Gogh's Bedroom suma suna ɓacewa yayin aikin don maido da zane. Sun gano a cikin jerin wasiƙu zuwa ga ɗan'uwansa da 'yar'uwarsa, Van Gogh ya bayyana dalla-dalla launuka masu haske na ɗakinsa. Wannan ya ba masana kimiyya damar sake gina yadda zanen zai kasance da farko. Sun gano cewa launin ruwan kasa mai launin ruwan kasa ya kamata ya kasance mai launi mai launin ruwan hoda da peach yayin da ganuwar blue sun kasance asalin orange-ja da violet. Aikin da Farfesa Janssens ya yi a baya ya nuna cewa wani launin rawaya mai haske, wanda aka fi sani da launin rawaya, a cikin zane-zanen Van Gogh shima yana canza launi. Lokacin da aka fallasa shi zuwa hasken ultraviolet, tawagarsa ta gano launin ruwan hoda mai launin ruwan hoda mai duhu ya zama launin ruwan kasa mai launin shuɗi. Ya yi imani cewa...
An gano cewa jan ruwan da Vincent van Gogh ya yi amfani da shi yana ɓacewa. Rashin tsabta a cikin zanen na iya haifar da wani sinadarin sunadarai a hasken rana. Masana kimiyya sun gano wani rare gubar tushen ma'adinai da aka kafa a cikin Paint. Wannan sai ya yi aiki tare da carbon dioxide daga iska don samar da lu'ulu'u masu launin fata. Sun yi gargadin cewa da yawa daga cikin zane-zanen mai zane-zane na iya zama cikin haɗarin wannan tsari. Sun bincika Wheat Stack Under a Cloudy Sky kuma sun gano cewa ya ɓace.