{"id":503,"date":"2020-10-15T11:17:22","date_gmt":"2020-10-15T09:17:22","guid":{"rendered":"https:\/\/www.babidule.fr\/?p=503"},"modified":"2020-10-16T09:53:06","modified_gmt":"2020-10-16T07:53:06","slug":"quest-que-le-tannage-vegetal","status":"publish","type":"post","link":"https:\/\/www.babidule.fr\/?p=503","title":{"rendered":"Qu&rsquo;est que le tannage v\u00e9g\u00e9tal ?"},"content":{"rendered":"\n<p>Le <strong>tannage<\/strong> est l\u2019op\u00e9ration qui consiste \u00e0 transformer la peau en cuir gr\u00e2ce \u00e0 des tanins, substances de diff\u00e9rentes natures (<strong>v\u00e9g\u00e9tal, min\u00e9ral ou combin\u00e9<\/strong>) qui permettent de passer d\u2019une peau putrescible, \u00e0 une mati\u00e8re imputrescible le cuir.<\/p>\n\n\n\n<p>Le <strong>tannage v\u00e9g\u00e9tal<\/strong> est la m\u00e9thode la plus ancienne. Il n\u00e9cessite l\u2019emploi de <strong>tanins v\u00e9g\u00e9taux<\/strong> qui peuvent \u00eatre tr\u00e8s vari\u00e9s : \u00e9corces d\u2019arbres (de ch\u00eane le plus souvent de mimosa, ch\u00e2taignier, quebracho \u2026), de feuilles ou de racines. Le tannage v\u00e9g\u00e9tal se r\u00e9alise lentement sur des p\u00e9riodes allant de quelques jours \u00e0 plusieurs mois. Il produit des cuirs souvent fermes voire durs. Ces propri\u00e9t\u00e9s permettent le&nbsp;<strong>travail<\/strong>&nbsp;du cuir notamment le&nbsp;<strong>repoussage du cuir<\/strong>&nbsp;(<strong>sculpture du cuir<\/strong>&nbsp;en bas relief) et une <strong>teinture<\/strong> \u00e0 base aqueuse. &nbsp;<\/p>\n\n\n\n<p>Au contrario, le tannage <strong>min\u00e9ral<\/strong>  (dit aussi tannage au Chrome), apparut fin du 19 \u00e8me si\u00e9cle, est la m\u00e9thode la plus courante. Il n\u00e9cessite l\u2019emploi de tanins min\u00e9raux : <strong>sels de chrome<\/strong>, sels de fer, sels de zirconium\u2026  Tr\u00e8s rapide (de quelques heures \u00e0 quelques jours), il produit des cuirs plus ou moins souples selon les conditions op\u00e9ratoires. Mais l&rsquo;usage de ces m\u00e9taux lourds, tr\u00e8s <strong>allergisants et polluant<\/strong>, pose donc des probl\u00e8mes.&nbsp;<\/p>\n\n\n\n<p>Pour en savoir plus sur le tannage et le cuir en g\u00e9n\u00e9ral, d\u00e9couvrez le livret <strong><a href=\"https:\/\/conseilnationalducuir.org\/sites\/default\/files\/medias-cnc\/cnc_livret_quest_ce_que_le_cuir.pdf\">Qu&rsquo;est ce que le cuir<\/a><\/strong> du conseil national du cuir.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le tannage est l\u2019op\u00e9ration qui consiste \u00e0 transformer la peau en cuir gr\u00e2ce \u00e0 des tanins, substances de diff\u00e9rentes natures (v\u00e9g\u00e9tal, min\u00e9ral ou combin\u00e9) qui permettent de passer d\u2019une peau [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":504,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[58],"tags":[52,53,51,54],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est que le tannage v\u00e9g\u00e9tal ? 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