{"id":2276,"date":"2014-09-28T16:00:46","date_gmt":"2014-09-28T15:00:46","guid":{"rendered":"http:\/\/www.proantic.com\/magazine\/?p=2276"},"modified":"2017-01-04T09:54:39","modified_gmt":"2017-01-04T08:54:39","slug":"lor-moulu-dorure-au-mercure","status":"publish","type":"post","link":"https:\/\/www.proantic.com\/magazine\/lor-moulu-dorure-au-mercure\/","title":{"rendered":"L&rsquo;or moulu (la dorure au Mercure)"},"content":{"rendered":"<p style=\"text-align: justify;\"><strong>Apparemment invent\u00e9e par les Chinois au II<sup>e<\/sup>\u00a0ou III<sup>e<\/sup>\u00a0avant J.-C. , apparue dans le monde occidental \u00e0 l\u2019\u00e9poque romaine (vers le II<sup>e<\/sup>\u00a0si\u00e8cle apr\u00e8s J.-C.), la technique de dorure utilisant l\u2019amalgame de mercure a \u00e9t\u00e9 utilis\u00e9e jusqu\u2019au XIX<sup>e<\/sup>\u00a0si\u00e8cle\u00a0avant la d\u00e9couverte et l&rsquo;exploitation de l&rsquo;\u00e9lectrolyse au milieu XIX\u00e8me si\u00e8cle.<\/strong> Malgr\u00e9 toute la peine que les d\u00e9corateurs et les orf\u00e8vres se donnent pour trouver le beau jaune du mercure, la dorure au mercure reste tr\u00e8s particuli\u00e8re et inimitable.<\/p>\n<figure id=\"attachment_2319\" aria-describedby=\"caption-attachment-2319\" style=\"width: 620px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2319\" data-permalink=\"https:\/\/www.proantic.com\/magazine\/lor-moulu-dorure-au-mercure\/51836-1-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11.jpg?fit=1064%2C1200&amp;ssl=1\" data-orig-size=\"1064,1200\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"Paire De Chandeliers d&amp;rsquo;\u00e9poque Empire. Bronze Dor\u00e9 Au Mercure\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Paire De Chandeliers d&amp;rsquo;\u00e9poque Empire. Bronze Dor\u00e9 Au Mercure&lt;br \/&gt;\nGalerie Clock Prestige (c) Proantic&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11.jpg?fit=266%2C300&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11.jpg?fit=665%2C751&amp;ssl=1\" class=\"wp-image-2319 size-large\" src=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11-907x1024.jpg?resize=620%2C699\" alt=\"Paire De Chandeliers d'\u00e9poque Empire. Bronze Dor\u00e9 Au Mercure\" width=\"620\" height=\"699\" srcset=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11.jpg?resize=907%2C1024&amp;ssl=1 907w, https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11.jpg?resize=266%2C300&amp;ssl=1 266w, https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11.jpg?resize=620%2C699&amp;ssl=1 620w, https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11.jpg?resize=940%2C1060&amp;ssl=1 940w, https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/51836-11.jpg?w=1064&amp;ssl=1 1064w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/a><figcaption id=\"caption-attachment-2319\" class=\"wp-caption-text\">Paire De Chandeliers d&rsquo;\u00e9poque Empire. Bronze Dor\u00e9 Au Mercure<br \/> Galerie Clock Prestige (c) Proantic<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">Ce proc\u00e9d\u00e9 de dorure consiste \u00e0 appliquer sur le support en cuivre ou en bronze parfaitement d\u00e9cap\u00e9\u00a0avec un \u00a0m\u00e9langes d&rsquo;acides (nitrique, sulfurique, chlorhydrique), un\u00a0amalgame\u00a0liquide. Selon les go\u00fbts et les \u00e9poques, on m\u00e9langeait l&rsquo;or avec du cuivre ou de l&rsquo;argent pour obtenir une coloration plus rouge ou jaune.<\/p>\n<p>L&rsquo;or moulu : de l&rsquo;or r\u00e9duit en chaux ou \u00ab\u00a0moulu\u00a0\u00bb sur une pierre \u00e0 broyer est amalgam\u00e9 dans le mercure ou du vif-argent, l&rsquo;or ayant la particularit\u00e9 de se dissoudre dans le\u00a0mercure. Cette amalgame est\u00a0chauff\u00e9 \u00e0 400 degr\u00e9s dans un creuset\u00a0dans une proportion d&rsquo;environ 1 \u00e0 8 et\u00a0est appliqu\u00e9 sur le bronze au moyen d&rsquo;une brosse.<\/p>\n<p>On chauffe ensuite l&rsquo;objet \u00a0dans un four, ce qui a pour effet de faire \u00e9vaporer le mercure jusqu&rsquo;\u00e0 sa compl\u00e8te disparition, laissant l&rsquo;or seul au fond des moindres d\u00e9tails du support.\u00a0Le bronze est ensuite d\u00e9pos\u00e9 sur une grille et l&rsquo;\u00e9vaporation du mercure permet la fixation de l&rsquo;or sur le bronze.<\/p>\n<figure id=\"attachment_2316\" aria-describedby=\"caption-attachment-2316\" style=\"width: 620px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2316\" data-permalink=\"https:\/\/www.proantic.com\/magazine\/lor-moulu-dorure-au-mercure\/71971-1\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg?fit=1200%2C799&amp;ssl=1\" data-orig-size=\"1200,799\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;3.5&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;NIKON D3100&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1300632405&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;18&quot;,&quot;iso&quot;:&quot;2000&quot;,&quot;shutter_speed&quot;:&quot;0.0166666666667&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"Paire De Chenets Bronze Style Louis XV 19\u00e8me Dorure Au Mercure\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Paire De Chenets Bronze Style Louis XV 19\u00e8me Dorure Au Mercure&lt;br \/&gt;\nGalerie Tic Tac Antiquit\u00e9s (c) Proantic&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg?fit=300%2C199&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg?fit=665%2C442&amp;ssl=1\" class=\"wp-image-2316 size-large\" src=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1-1024x681.jpg?resize=620%2C412\" alt=\"Paire De Chenets Bronze Style Louis XV 19\u00e8me Dorure Au Mercure\" width=\"620\" height=\"412\" srcset=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg?resize=1024%2C681&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg?resize=620%2C412&amp;ssl=1 620w, https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg?resize=192%2C128&amp;ssl=1 192w, https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg?resize=940%2C625&amp;ssl=1 940w, https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/71971-1.jpg?w=1200&amp;ssl=1 1200w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/a><figcaption id=\"caption-attachment-2316\" class=\"wp-caption-text\">Paire De Chenets Bronze Style Louis XV 19\u00e8me Dorure Au Mercure<br \/> Galerie Tic Tac Antiquit\u00e9s (c) Proantic<\/figcaption><\/figure>\n<p>Apr\u00e8s refroidissement, la couche \u00a0l&rsquo;or en d\u00e9p\u00f4t est \u00e9cras\u00e9 dans les pores du support\u00a0avec un brunissoir\u00a0constitu\u00e9 d&rsquo;une pierre dure emmanch\u00e9e \u00a0(h\u00e9matite ou agate) pour\u00a0\u00e9galiser et \u00a0polir la dorure et\u00a0obtenir sur les reliefs des reflets lumineux. Ce brunissage souligne les volumes et les d\u00e9tails.<\/p>\n<p style=\"text-align: justify;\">La dorure au mercure est un proc\u00e9d\u00e9\u00a0qui a \u00e9t\u00e9 appliqu\u00e9 \u00e0 la plupart des sculptures\u00a0en bronze dor\u00e9 depuis la Renaissance\u00a0. Il est aujourd&rsquo;hui quasi-abandonn\u00e9, car sa mise en \u0153uvre d\u00e9gage des vapeurs de mercure\u00a0\u00a0tr\u00e8s toxiques,\u00a0le mercure sous forme de gaz est un \u00e9l\u00e9ment particuli\u00e8rement dangereux et dommageables pour l&rsquo;artisan et l&rsquo;environnement. La dorure au mercure fut interdite au milieu du XIX\u00e8me si\u00e8cle, sous Napol\u00e9on III.<\/p>\n<figure id=\"attachment_2318\" aria-describedby=\"caption-attachment-2318\" style=\"width: 938px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/78470-1.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2318\" data-permalink=\"https:\/\/www.proantic.com\/magazine\/lor-moulu-dorure-au-mercure\/78470-1\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/78470-1-e1411915926520.jpg?fit=538%2C440&amp;ssl=1\" data-orig-size=\"538,440\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;4.2&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;DMC-TZ10&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1394886606&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;12.8&quot;,&quot;iso&quot;:&quot;80&quot;,&quot;shutter_speed&quot;:&quot;0.00625&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"Paire de flambeaux au Triton et N\u00e9r\u00e9\u00efde en bronze dor\u00e9 au mercure, \u00e9poque XIX\u00e8me si\u00e8cle.\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Paire de flambeaux au Triton et N\u00e9r\u00e9\u00efde en bronze dor\u00e9 au mercure, \u00e9poque XIX\u00e8me si\u00e8cle.&lt;br \/&gt;\nGalerie Antiquit\u00e9s Freitas&lt;br \/&gt;\n(c) Proantic&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/78470-1-e1411915926520.jpg?fit=300%2C245&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/78470-1-e1411915926520.jpg?fit=538%2C440&amp;ssl=1\" class=\"wp-image-2318 size-full\" src=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/78470-1.jpg?resize=665%2C544\" alt=\"Paire de flambeaux au Triton et N\u00e9r\u00e9\u00efde en bronze dor\u00e9 au mercure, \u00e9poque XIX\u00e8me si\u00e8cle.\" width=\"665\" height=\"544\" \/><\/a><figcaption id=\"caption-attachment-2318\" class=\"wp-caption-text\"><strong>Paire de flambeaux au Triton et N\u00e9r\u00e9\u00efde en bronze dor\u00e9 au mercure, \u00e9poque XIX\u00e8me si\u00e8cle.<\/strong><br \/> Galerie Antiquit\u00e9s Freitas<br \/> (c) Proantic<\/figcaption><\/figure>\n<p>Ce proc\u00e9d\u00e9 donne une dorure\u00a0d&rsquo;une beaut\u00e9 et d&rsquo;une solidit\u00e9 extraordinaires.\u00a0l&rsquo;\u00e9paisseur d&rsquo;or peut \u00eatre tr\u00e8s importante, mais cette technique ne peut s&rsquo;appliquer qu&rsquo;\u00e0 des objets de petite taille pour des raisons de manipulation, et supportant l&rsquo;\u00e9preuve du feu. Il s&rsquo;agit le plus souvent de bronze d&rsquo;art\u00a0ou d&rsquo;ameublement.<\/p>\n<p>De nos jours, la dorure au mercure est toujours utilis\u00e9e officieusement pour des pi\u00e8ces exceptionnelles de mus\u00e9es et dans des conditions de s\u00e9curit\u00e9 optimales.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apparemment invent\u00e9e par les Chinois au IIe ou IIIe avant J.-C. , apparue dans le monde occidental \u00e0 l\u2019\u00e9poque romaine (vers le IIe si\u00e8cle apr\u00e8s J.-C.), la technique de dorure utilisant l\u2019amalgame de mercure a \u00e9t\u00e9 utilis\u00e9e jusqu\u2019au XIXe si\u00e8cle avant la d\u00e9couverte et l&rsquo;exploitation de l&rsquo;\u00e9lectrolyse au milieu XIX\u00e8me si\u00e8cle.<\/p>\n","protected":false},"author":6,"featured_media":2320,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[372],"tags":[389,390],"class_list":["post-2276","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-abc-du-decor","tag-dorure-au-mercure","tag-or-moulu"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - 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content=\"https:\/\/i0.wp.com\/www.proantic.com\/magazine\/wp-content\/uploads\/2014\/09\/jknjui.jpg?fit=566%2C447&ssl=1\" \/>\n\t<meta property=\"og:image:width\" content=\"566\" \/>\n\t<meta property=\"og:image:height\" content=\"447\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"C\u00e9line Autant\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"C\u00e9line Autant\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.proantic.com\/magazine\/lor-moulu-dorure-au-mercure\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.proantic.com\/magazine\/lor-moulu-dorure-au-mercure\/\"},\"author\":{\"name\":\"C\u00e9line 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