{"id":18198,"date":"2024-05-26T09:37:14","date_gmt":"2024-05-26T07:37:14","guid":{"rendered":"https:\/\/www.profartspla.site\/wordpress\/?post_type=glossary&#038;p=18198"},"modified":"2024-05-26T10:05:40","modified_gmt":"2024-05-26T08:05:40","slug":"positif-direct","status":"publish","type":"glossary","link":"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/positif-direct\/","title":{"rendered":"Positif direct"},"content":{"rendered":"<p class=\"has-text-align-center has-medium-font-size\"><strong><a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_0038c468dac193075d923e8ae65af28f\"  href=\"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/positif-direct\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>Positif direct<\/a><\/strong><\/p>\n\n\n\n<p>La technique dite du <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_0038c468dac193075d923e8ae65af28f\"  href=\"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/positif-direct\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>positif direct<\/a> est un proc&eacute;d&eacute; photographique mis au point notamment par Hippolyte Bayard d&egrave;s le printemps de l&rsquo;ann&eacute;e 1839. Ce proc&eacute;d&eacute; consiste &agrave; pr&eacute;-insoler une feuille de papier rendue photosensible afin qu&rsquo;elle blanchisse sous l&rsquo;effet de la <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_c229695f5270cd46191083d023c542ab\"  href=\"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/lumiere\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>lumi&egrave;re<\/a> dans la chambre obscure. Directement <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_4c864ec2df3f29b5c2fdb514aad30514\"  href=\"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/positif\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>positive<\/a>, c&rsquo;est-&agrave;-dire sans passer par l&rsquo;&eacute;tape interm&eacute;diaire de la production d&rsquo;un <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_4c864ec2df3f29b5c2fdb514aad30514\"  href=\"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/positif\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>n&eacute;gatif<\/a>, l&rsquo;<a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_32115a200381ae17929ebaf3b6ae4e91\"  href=\"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/image\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>image<\/a> ainsi obtenue est donc unique, en sens invers&eacute; droite-gauche et ses <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_0c1082896d7378ea53cf15f088453369\"  href=\"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/contrastes-simultanes\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>contrastes<\/a> sont g&eacute;n&eacute;ralement assez faibles. Hippolyte d&eacute;ploya beaucoup d&rsquo;&eacute;nergie entre 1839 et 1840 afin de d&eacute;velopper ce proc&eacute;d&eacute; qu&rsquo;il abandonnera sans doute &agrave; l&rsquo;hiver 1840-1841. C&rsquo;est avec ce proc&eacute;d&eacute; qu&rsquo;il r&eacute;alise son <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_32115a200381ae17929ebaf3b6ae4e91\"  href=\"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/image\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>image<\/a> la plus c&eacute;l&egrave;bre, un <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_75df9a0ebc744144b2e744e371ee7872\"  href=\"https:\/\/www.profartspla.site\/wordpress\/Dictionnaire\/autoportrait\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>autoportrait<\/a> en noy&eacute;, dont on connait trois versions diff&eacute;rentes.<\/p>\n\n\n\n<p><a href=\"https:\/\/blog.sfp.asso.fr\/?post\/2018\/02\/01\/les-positifs-directs-sur-papier-d-hippolyte-bayard-sont-maintenant-en-ligne\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/blog.sfp.asso.fr\/?post\/2018\/02\/01\/les-positifs-directs-sur-papier-d-hippolyte-bayard-sont-maintenant-en-ligne<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Positif direct La technique dite du positif direct est un proc\u00e9d\u00e9 photographique mis au point notamment par Hippolyte Bayard d\u00e8s le printemps de l\u2019ann\u00e9e 1839. Ce proc\u00e9d\u00e9 consiste \u00e0 pr\u00e9-insoler une feuille de papier rendue photosensible afin qu\u2019elle blanchisse sous l\u2019effet de la lumi\u00e8re dans la chambre obscure. Directement positive, c\u2019est-\u00e0-dire sans passer par l\u2019\u00e9tape &hellip; <\/p>\n","protected":false},"author":1,"featured_media":13828,"menu_order":0,"template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-18198","glossary","type-glossary","status-publish","has-post-thumbnail","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.profartspla.site\/wordpress\/wp-json\/wp\/v2\/glossary\/18198","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.profartspla.site\/wordpress\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/www.profartspla.site\/wordpress\/wp-json\/wp\/v2\/types\/glossary"}],"author":[{"embeddable":true,"href":"https:\/\/www.profartspla.site\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":2,"href":"https:\/\/www.profartspla.site\/wordpress\/wp-json\/wp\/v2\/glossary\/18198\/revisions"}],"predecessor-version":[{"id":18200,"href":"https:\/\/www.profartspla.site\/wordpress\/wp-json\/wp\/v2\/glossary\/18198\/revisions\/18200"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.profartspla.site\/wordpress\/wp-json\/wp\/v2\/media\/13828"}],"wp:attachment":[{"href":"https:\/\/www.profartspla.site\/wordpress\/wp-json\/wp\/v2\/media?parent=18198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}