{"id":13,"date":"2024-04-04T04:31:15","date_gmt":"2024-04-04T01:31:15","guid":{"rendered":"https:\/\/sisu.ut.ee\/heritage-analysis\/12-chemistry-ageing\/"},"modified":"2024-07-16T17:46:56","modified_gmt":"2024-07-16T14:46:56","slug":"12-chemistry-ageing","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/heritage-analysis\/12-chemistry-ageing\/","title":{"rendered":"1.2. Chemistry of ageing"},"content":{"rendered":"<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cf370e7 wp-block-group-is-layout-flex\">\n<p>All materials age with time due to the different physical, chemical and\/or biological processes, which lead to material degradation.\u00a0As a result,\u00a0the chemical composition of materials (especially\u00a0if mainly composed of\u00a0 organic substances) changes with time.\u00a0In almost all cases ageing is undesired and\u00a0is a big concern for the museum workers and conservators.\u00a0<\/p>\n\n\n\n<p>The first video of\u00a0this section\u00a0gives an introduction to the\u00a0 materials ageing processes.\u00a0The second video discusses the environmental factors that influence ageing. The third and fourth video discuss two examples of material ageing:\u00a0linseed oil and dammar resin.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"color: #b22222;\"><em>Chemistry of ageing: I. INTRODUCTION<\/em><\/span><\/h2>\n<\/div>\n\n\n\n<p><\/p><div class=\"ratio ratio-16x9 mb-3\"><div class=\"video-placeholder-wrapper video-placeholder-wrapper--16x9\">\n\t\t\t    <div class=\"video-placeholder d-flex justify-content-center align-items-center\">\n\t\t\t        <div class=\"overlay text-white p-2 w-100 text-center d-block justify-content-center align-items-center\">\n\t\t\t            <div>To view third-party content, please accept cookies.<\/div>\n\t\t\t            <button class=\"btn btn-secondary btn-sm mt-1 consent-change\">Change consent<\/button>\n\t\t\t        <\/div>\n\t\t\t    <\/div>\n\t\t\t<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"color: #b22222;\"><em>Chemistry of ageing: II. ENVIRONMENTAL FACTORS<\/em><\/span><\/h2>\n\n\n\n<p><\/p><div class=\"ratio ratio-16x9 mb-3\"><div class=\"video-placeholder-wrapper video-placeholder-wrapper--16x9\">\n\t\t\t    <div class=\"video-placeholder d-flex justify-content-center align-items-center\">\n\t\t\t        <div class=\"overlay text-white p-2 w-100 text-center d-block justify-content-center align-items-center\">\n\t\t\t            <div>To view third-party content, please accept cookies.<\/div>\n\t\t\t            <button class=\"btn btn-secondary btn-sm mt-1 consent-change\">Change consent<\/button>\n\t\t\t        <\/div>\n\t\t\t    <\/div>\n\t\t\t<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"color: #b22222;\"><em>Chemistry of ageing: III. EXAMPLE: LINSEED OIL<\/em><\/span><\/h2>\n\n\n\n<p><\/p><div class=\"ratio ratio-16x9 mb-3\"><div class=\"video-placeholder-wrapper video-placeholder-wrapper--16x9\">\n\t\t\t    <div class=\"video-placeholder d-flex justify-content-center align-items-center\">\n\t\t\t        <div class=\"overlay text-white p-2 w-100 text-center d-block justify-content-center align-items-center\">\n\t\t\t            <div>To view third-party content, please accept cookies.<\/div>\n\t\t\t            <button class=\"btn btn-secondary btn-sm mt-1 consent-change\">Change consent<\/button>\n\t\t\t        <\/div>\n\t\t\t    <\/div>\n\t\t\t<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"color: #b22222;\"><em>Chemistry of ageing: IV. EXAMPLE: DAMMAR RESIN<\/em><\/span><\/h2>\n\n\n\n<p><\/p><div class=\"ratio ratio-16x9 mb-3\"><div class=\"video-placeholder-wrapper video-placeholder-wrapper--16x9\">\n\t\t\t    <div class=\"video-placeholder d-flex justify-content-center align-items-center\">\n\t\t\t        <div class=\"overlay text-white p-2 w-100 text-center d-block justify-content-center align-items-center\">\n\t\t\t            <div>To view third-party content, please accept cookies.<\/div>\n\t\t\t            <button class=\"btn btn-secondary btn-sm mt-1 consent-change\">Change consent<\/button>\n\t\t\t        <\/div>\n\t\t\t    <\/div>\n\t\t\t<\/div>\n<\/div>\n\n\n\n<p>The slides used in the videos can be downloaded from\u00a0here:<\/p>\n\n\n\n<div class=\"wp-block-group attached-files-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-9dfa7d48-6bd8-4dd2-9b04-3b6e79eb28b8\" href=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/285\/chemistry_of_ageing.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Chemistry_of_ageing.pdf<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>All materials age with time due to the different physical, chemical and\/or biological processes, which lead to material degradation.\u00a0As a result,\u00a0the chemical composition of materials (especially\u00a0if mainly composed of\u00a0 organic substances) changes with time.\u00a0In almost all cases ageing is undesired &#8230;<\/p>\n","protected":false},"author":151,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-13","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sisu.ut.ee\/heritage-analysis\/wp-json\/wp\/v2\/pages\/13","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sisu.ut.ee\/heritage-analysis\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sisu.ut.ee\/heritage-analysis\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/heritage-analysis\/wp-json\/wp\/v2\/users\/151"}],"replies":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/heritage-analysis\/wp-json\/wp\/v2\/comments?post=13"}],"version-history":[{"count":4,"href":"https:\/\/sisu.ut.ee\/heritage-analysis\/wp-json\/wp\/v2\/pages\/13\/revisions"}],"predecessor-version":[{"id":792,"href":"https:\/\/sisu.ut.ee\/heritage-analysis\/wp-json\/wp\/v2\/pages\/13\/revisions\/792"}],"wp:attachment":[{"href":"https:\/\/sisu.ut.ee\/heritage-analysis\/wp-json\/wp\/v2\/media?parent=13"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}