{"id":20886,"date":"2007-09-04T01:15:25","date_gmt":"2007-09-03T23:15:25","guid":{"rendered":"https:\/\/bicentennial-of-photography.org\/?p=20886"},"modified":"2024-12-04T13:46:26","modified_gmt":"2024-12-04T12:46:26","slug":"la-piece-manquante-du-plus-vieux-labo-photo-du-monde","status":"publish","type":"post","link":"https:\/\/bicentennial-of-photography.org\/fr\/2007\/09\/04\/la-piece-manquante-du-plus-vieux-labo-photo-du-monde\/","title":{"rendered":"La pi\u00e8ce manquante du plus vieux labo photo du monde"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-medium-font-size\">La maison de Petiot-Groffier recelait un autre tr\u00e9sor\u2026<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"670\" height=\"447\" src=\"https:\/\/bicentennial-of-photography.org\/wp-content\/uploads\/2007\/09\/journal-petiot_2_featured.jpg\" alt=\"\" class=\"wp-image-20891\" srcset=\"https:\/\/bicentennial-of-photography.org\/wp-content\/uploads\/2007\/09\/journal-petiot_2_featured.jpg 670w, https:\/\/bicentennial-of-photography.org\/wp-content\/uploads\/2007\/09\/journal-petiot_2_featured-300x200.jpg 300w, https:\/\/bicentennial-of-photography.org\/wp-content\/uploads\/2007\/09\/journal-petiot_2_featured-580x387.jpg 580w\" sizes=\"auto, (max-width: 670px) 100vw, 670px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Apr\u00e8s le laboratoire sec, c&rsquo;est le laboratoire humide de Petiot-Groffier qui a \u00e9t\u00e9 retrouv\u00e9 dans son ancienne demeure, compl\u00e9tant la d\u00e9couverte du plus vieux laboratoire photo du monde.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un labo photo, m\u00eame le plus ancien du monde, peut en cacher un autre. Pierre-Yves Mah\u00e9 vient d&rsquo;en faire &#8211; avec un grand plaisir on s&rsquo;en doute &#8211; l&rsquo;exp\u00e9rience.<br>En d\u00e9but d&rsquo;ann\u00e9e, le responsable de la Maison Ni\u00e9pce \u00e0 Saint-Loup-de-Varennes avait d\u00e9j\u00e0 mis la main sur un v\u00e9ritable tr\u00e9sor. Le dernier h\u00e9ritier de Joseph-Fortun\u00e9 Petiot-Groffier d\u00e9couvrait, dans la maison familiale de la r\u00e9gion chalonnaise, au deuxi\u00e8me \u00e9tage, cach\u00e9 derri\u00e8re une porte rest\u00e9e close durant 152 ans, le laboratoire photographique de son anc\u00eatre, le plus ancien au monde d\u00e9couvert intact \u00e0 ce jour. C&rsquo;est \u00e0 Pierre-Yves Mah\u00e9, directeur de la Maison Ni\u00e9pce \u00e0 Saint-Loup-de-Varennes, qu&rsquo;il d\u00e9cide de confier la d\u00e9couverte : un v\u00e9ritable tr\u00e9sor (voir notre \u00e9dition du 29 mai).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sous le coup de l&rsquo;\u00e9motion et press\u00e9 de dresser l&rsquo;inventaire des centaines de pi\u00e8ces forc\u00e9ment d&rsquo;\u00e9poque retrouv\u00e9es dans ce laboratoire, Pierre-Yves Mah\u00e9 ne pousse pas les investigations dans la maison \u00e0 la recherche de la pi\u00e8ce manquante. Car il manque en effet un \u00e9l\u00e9ment important qui ne doit pas se trouver bien loin. Le laboratoire d\u00e9couvert permettait \u00e0 Joseph-Fortun\u00e9 Petiot-Groffier de travailler ses photographies mais en aucun cas de les d\u00e9velopper : il manque la chambre noire, la pi\u00e8ce symbole m\u00eame de la photographie.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Au cours d&rsquo;un voyage aux \u00c9tats-Unis, Pierre-Yves Mah\u00e9 pr\u00e9sente sa d\u00e9couverte aux chercheurs de la Georges-Eastman House. Ceux-ci sont \u00e9videmment fascin\u00e9s et s&rsquo;interrogent aussit\u00f4t : \u00ab Mais vous n&rsquo;avez pas trouv\u00e9 le laboratoire humide ? \u00bb.<br>Rentr\u00e9 en France, Pierre-Yves Mah\u00e9 d\u00e9cide donc de partir \u00e0 la recherche du laboratoire perdu. Avec l&rsquo;aide de l&rsquo;h\u00e9ritier de Petiot-Groffier, il refait le tour de la maison, inspectant pi\u00e8ce par pi\u00e8ce, recoin par recoin.<br>Et c&rsquo;est dans un simple d\u00e9barras que l&rsquo;on retrouve la fameuse pi\u00e8ce manquante. Au premier \u00e9tage de l&rsquo;habitation, derri\u00e8re deux grandes portes battantes donnant sur une pi\u00e8ce enti\u00e8rement plong\u00e9e dans l&rsquo;obscurit\u00e9 et qui avait \u00e9t\u00e9 utilis\u00e9e depuis des d\u00e9cennies pour entreposer divers mat\u00e9riels. Au fond de cette pi\u00e8ce, dans un angle, un \u00e9vier. Juste \u00e0 c\u00f4t\u00e9, l&#8217;emplacement d&rsquo;une fen\u00eatre se distingue. Soigneusement calfeutr\u00e9e pour ne laisser filtrer aucune lumi\u00e8re. Sur l&rsquo;un des panneaux, une petite trappe peut s&rsquo;ouvrir en laissant passer la lumi\u00e8re au travers d&rsquo;un filtre rouge, ce rouge inactinique utilis\u00e9 encore dans les labos photos aujourd&rsquo;hui car il ne fait pas r\u00e9agir la pellicule.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00ab En regardant de plus pr\u00e8s, on voit Petiot-Groffier travailler. On imagine son combat contre la lumi\u00e8re lorsque l&rsquo;on analyse le syst\u00e8me d&rsquo;obturation de la fen\u00eatre. Un premier \u00e9quipement en bois, r\u00e9alis\u00e9 sur mesure par un \u00e9b\u00e9niste ferme la fen\u00eatre, mais celui-ci n&rsquo;\u00e9tait pas assez \u00e9tanche et l&rsquo;on remarque la feutrine clou\u00e9e pour boucher les derniers interstices. Quant \u00e0 la petite trappe, elle est bricol\u00e9e avec de la ficelle et de la feutrine pour obtenir le r\u00e9sultat parfait \u00bb, explique Pierre-Yves Mah\u00e9.<br>Un r\u00e9sultat si parfait que dans le fond de cette pi\u00e8ce, personne ne se doutait qu&rsquo;une fen\u00eatre pouvait exister.<br>Mais au-del\u00e0 de la pi\u00e8ce charg\u00e9e de symboles qui vient d&rsquo;\u00eatre retrouv\u00e9e, Pierre-Yves Mah\u00e9 a \u00e9galement remis la main sur certains objets manquant dans le premier laboratoire. Notamment des lampes inactiniques, qui permettaient d&rsquo;\u00e9clairer les lieux sans g\u00eaner le travail du photographe.<br>La maison de Petiot-Groffier a sans doute d\u00e9sormais d\u00e9voil\u00e9 tous ces tr\u00e9sors mais il reste beaucoup de travail aux chercheurs pour les analyser. D\u00e9sormais, ils poss\u00e8dent l&rsquo;ensemble d&rsquo;un laboratoire, intact, tel qu&rsquo;il existait de 1840 \u00e0 1855.<\/p>\n\n\n\n<p class=\"has-text-align-right wp-block-paragraph\">C. Saulnier<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La maison de Petiot-Groffier recelait un autre tr\u00e9sor\u2026 Apr\u00e8s le laboratoire sec, c&rsquo;est le laboratoire humide de Petiot-Groffier qui a \u00e9t\u00e9 retrouv\u00e9 dans son ancienne demeure, compl\u00e9tant la d\u00e9couverte du plus vieux laboratoire photo du monde. Un labo photo, m\u00eame le plus ancien du monde, peut en cacher un autre. Pierre-Yves Mah\u00e9 vient d&rsquo;en faire&#8230;<\/p>\n","protected":false},"author":1,"featured_media":21401,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[74],"tags":[],"class_list":["post-20886","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-le-plus-vieil-atelier-photo-du-monde"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La pi\u00e8ce manquante du plus vieux labo photo du monde - Bicentenaire de la photographie<\/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:\/\/bicentennial-of-photography.org\/fr\/2007\/09\/04\/la-piece-manquante-du-plus-vieux-labo-photo-du-monde\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La pi\u00e8ce manquante du plus vieux labo photo du monde - Bicentenaire de la photographie\" \/>\n<meta property=\"og:description\" content=\"La maison de Petiot-Groffier recelait un autre tr\u00e9sor\u2026 Apr\u00e8s le laboratoire sec, c&rsquo;est le laboratoire humide de Petiot-Groffier qui a \u00e9t\u00e9 retrouv\u00e9 dans son ancienne demeure, compl\u00e9tant la d\u00e9couverte du plus vieux laboratoire photo du monde. 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