{"id":84989,"date":"2023-04-02T09:47:05","date_gmt":"2023-04-02T07:47:05","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=84989"},"modified":"2023-04-02T09:47:05","modified_gmt":"2023-04-02T07:47:05","slug":"marii-pictori-renascentisti-ca-da-vinci-sau-botticelli-aveau-un-secret-in-picturile-lor-dezvaluie-un-studiu-stiintific","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/marii-pictori-renascentisti-ca-da-vinci-sau-botticelli-aveau-un-secret-in-picturile-lor-dezvaluie-un-studiu-stiintific\/","title":{"rendered":"Marii pictori renascenti\u015fti, ca Da Vinci sau Botticelli, aveau un secret \u00een picturile lor &#8211; dezv\u0103luie un studiu \u015ftiin\u0163ific"},"content":{"rendered":"<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2023\/04\/mari-pictori.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-84990\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2023\/04\/mari-pictori.jpg\" alt=\"\" width=\"347\" height=\"264\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2023\/04\/mari-pictori.jpg 347w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2023\/04\/mari-pictori-300x228.jpg 300w\" sizes=\"auto, (max-width: 347px) 100vw, 347px\" \/><\/a>Marii mae\u015ftri clasici ai picturii, precum Leonardo da Vinci, Sandro Botticelli sau Rembrandt, ar fi folosit proteine, \u00een special g\u0103lbenu\u0219uri de ou\u0103, \u00een picturile lor realizate \u00een ulei, spune un nou studiu. Urme de reziduuri de proteine \u200b\u200bau fost detectate de mult timp \u00een picturile clasice \u00een ulei, de\u0219i acestea au fost adesea atribuite contamin\u0103rii. \u00cens\u0103, un nou studiu publicat \u00een revista <strong><em>&#8222;Nature Communications&#8221;<\/em><\/strong> a constatat c\u0103 includerea acestor proteine a fost una inten\u021bionat\u0103, iar acest lucru arunc\u0103 lumin\u0103 asupra cuno\u0219tin\u021belor tehnice ale acestor mae\u0219tri, cei mai pricepu\u021bi pictori europeni ai secolelor al XVI-lea, al XVII-lea sau al XVIII-lea.<\/p>\n<p>Autoarea studiului, Ophelie Ranquet, de la Institutul de Tehnologie Karlsruhe din Germania, a spus c\u0103 studiul arat\u0103 c\u0103, chiar \u0219i cu o cantitate foarte mic\u0103 de g\u0103lbenu\u0219 de ou, se poate ob\u021bine o schimbare uimitoare a propriet\u0103\u021bilor vopselelor \u00een ulei. Pur \u0219i simplu, ad\u0103ugarea unor g\u0103lbenu\u0219uri de ou \u00een picturi ar putea avea efecte de lung\u0103 durat\u0103, care dep\u0103\u0219esc doar aspectul estetic.<\/p>\n<p>\u00cen compara\u021bie cu tehnica egiptenilor antici, numit\u0103 tempera, care combin\u0103 g\u0103lbenu\u0219ul de ou cu pigmen\u021bi sub form\u0103 de pudr\u0103 \u0219i ap\u0103, vopseaua \u00een ulei creeaz\u0103 culori mai intense, permite tranzi\u021bii de culoare foarte netede \u0219i se usuc\u0103 mai pu\u0163in rapid, astfel \u00eenc\u00e2t ea poate fi folosit\u0103 c\u00e2teva zile dup\u0103 preg\u0103tire. Cu toate acestea, vopseaua \u00een ulei, care folose\u0219te ulei de in sau de \u0219ofran \u00een loc de ap\u0103, are \u0219i dezavantaje, ea fiind mai susceptibil\u0103 la \u00eentunecarea culorii \u0219i la daune cauzate de expunerea la lumin\u0103.<\/p>\n<p>Deoarece fabricarea vopselei a fost un proces artizanal \u0219i experimental, este posibil ca vechii mae\u0219tri s\u0103 fi ad\u0103ugat g\u0103lbenu\u0219 de ou, un ingredient familiar, noului tip de vopsea, care a ap\u0103rut pentru prima dat\u0103 \u00een secolul al VII-lea \u00een Asia Central\u0103, \u00eenainte de a se r\u0103sp\u00e2ndi \u00een Europa \u00een Evul Mediu \u015fi \u00een perioada Rena\u015fterii. \u00cen cadrul studiului, cercet\u0103torii au recreat procesul de fabricare a vopselei folosind patru ingrediente &#8211; g\u0103lbenu\u0219 de ou, ap\u0103 distilat\u0103, ulei de in \u0219i pigment &#8211; pentru a amesteca dou\u0103 culori populare \u0219i semnificative istoric, alb de plumb \u0219i albastru ultramarin.<\/p>\n<p>Se pare c\u0103 ad\u0103ugarea de g\u0103lbenu\u0219 de ou este benefic\u0103, deoarece poate regla propriet\u0103\u021bile acestor vopsele \u00eentr-un mod drastic. De exemplu, este nevoie de mai mult timp pentru ca vopseaua s\u0103 se oxideze, din cauza antioxidan\u021bilor con\u021binu\u0163i \u00een g\u0103lbenu\u0219.<\/p>\n<p>Reac\u021biile chimice dintre ulei, pigment \u0219i proteinele din g\u0103lbenu\u0219 afecteaz\u0103 direct comportamentul \u0219i v\u00e2scozitatea vopselei. De exemplu, pigmentul alb de plumb este destul de sensibil la umiditate, dar dac\u0103 \u00eel acoperim cu un strat de proteine, \u00eel face mult mai rezistent la umiditate, vopseaua fiind destul de u\u0219or de aplicat.<\/p>\n<p>Acest studiu este foarte interesant, deoarece ofer\u0103 o nou\u0103 modalitate pentru \u00een\u021belegerea tehnicilor vechi de pictur\u0103, despre care nu se cunoa\u015fte mai nimic p\u00e2n\u0103 \u00een prezent. Aceste noi cuno\u0219tin\u021be contribuie nu numai la o mai bun\u0103 conservare a operelor de art\u0103, ci \u0219i la o mai bun\u0103 \u00een\u021belegere a istoriei artei.<\/p>\n<p><strong>Sursa<\/strong> (traducerea \u015fi adaptarea proprie): studiul \u015ftiin\u0163ific <a href=\"https:\/\/www.nature.com\/articles\/s41467-023-36859-5\" target=\"_blank\" rel=\"noopener\"><strong>&#8222;A holistic view on the role of egg yolk in Old Masters\u2019 oil paints&#8221; \/ nature.com<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Marii mae\u015ftri clasici ai picturii, precum Leonardo da Vinci, Sandro Botticelli sau Rembrandt, ar fi folosit proteine, \u00een special g\u0103lbenu\u0219uri de ou\u0103, \u00een picturile lor realizate \u00een ulei, spune un nou studiu. Urme de reziduuri de proteine \u200b\u200bau fost detectate &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Marii pictori renascenti\u015fti, ca Da Vinci sau Botticelli, aveau un secret \u00een picturile lor &#8211; dezv\u0103luie un studiu \u015ftiin\u0163ific\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/marii-pictori-renascentisti-ca-da-vinci-sau-botticelli-aveau-un-secret-in-picturile-lor-dezvaluie-un-studiu-stiintific\/#more-84989\" aria-label=\"Cite\u0219te mai multe despre Marii pictori renascenti\u015fti, ca Da Vinci sau Botticelli, aveau un secret \u00een picturile lor &#8211; dezv\u0103luie un studiu \u015ftiin\u0163ific\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":84990,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[1162,950,16610,601,2270,11662,2924,9798,480,1167,341,124,17379,203,11789,952,1474,165,292,1317,186,1323,18217,481,2364,18216,5155,4494],"class_list":["post-84989","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cultura","tag-alb","tag-albastru","tag-antioxidanti","tag-apa","tag-asia","tag-botticelli","tag-culoare","tag-cultura","tag-da-vinci","tag-egipteni","tag-europa","tag-evul-mediu","tag-galbenus","tag-germania","tag-in","tag-lumina","tag-oua","tag-pictor","tag-pictura","tag-plumb","tag-proteine","tag-rembrandt","tag-renaste","tag-renastere","tag-revista","tag-sofran","tag-ulei","tag-vopsea","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Marii pictori renascenti\u015fti, ca Da Vinci sau Botticelli, aveau un secret \u00een picturile lor - dezv\u0103luie un studiu \u015ftiin\u0163ific - Secretele lui Lovendal<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lovendal.ro\/wp52\/marii-pictori-renascentisti-ca-da-vinci-sau-botticelli-aveau-un-secret-in-picturile-lor-dezvaluie-un-studiu-stiintific\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Marii pictori renascenti\u015fti, ca Da Vinci sau Botticelli, aveau un secret \u00een picturile lor - dezv\u0103luie un studiu \u015ftiin\u0163ific\" \/>\n<meta property=\"og:description\" content=\"Marii mae\u015ftri clasici ai picturii, precum Leonardo da Vinci, Sandro Botticelli sau Rembrandt, ar fi folosit proteine, \u00een special g\u0103lbenu\u0219uri de ou\u0103, \u00een picturile lor realizate \u00een ulei, spune un nou studiu. 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Urme de reziduuri de proteine \u200b\u200bau fost detectate ... 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