{"id":3114,"date":"2026-04-03T16:27:20","date_gmt":"2026-04-03T14:27:20","guid":{"rendered":"https:\/\/4h-jewellery-tutorials.com\/?post_type=product&p=3114"},"modified":"2026-04-03T16:40:16","modified_gmt":"2026-04-03T14:40:16","slug":"alliage-or-24k-a-18k","status":"publish","type":"product","link":"https:\/\/4h-jewellery-tutorials.com\/fr\/produit\/alliage-or-24k-a-18k\/","title":{"rendered":"Tutoriel n\u00b0 37 : Alliage d’or de 24k \u00e0 18k"},"content":{"rendered":"

La transformation de l’or fin en or 18 carats (\u00e9galement appel\u00e9 or 750)<\/strong> est une technique pr\u00e9cise et essentielle de l’orf\u00e8vrerie professionnelle. L’or pur, bien que tr\u00e8s appr\u00e9ci\u00e9 pour sa brillance et sa r\u00e9sistance \u00e0 la corrosion, est trop tendre pour la plupart des applications pratiques en bijouterie. Pour am\u00e9liorer sa r\u00e9sistance m\u00e9canique et sa r\u00e9sistance \u00e0 l’usure, il est alli\u00e9 \u00e0 des m\u00e9taux compl\u00e9mentaires tels que l’argent et le cuivre<\/strong>. <\/p>\n

Dans ce processus, un lingot d’or est d’abord sectionn\u00e9 pour obtenir 9 grammes d’or fin<\/strong>. Cet or est ensuite soigneusement fondu avec une proportion calcul\u00e9e d’argent et de cuivre, ce qui donne un alliage final de 12 grammes<\/strong>. Cette proportion garantit que l’or repr\u00e9sente 75 % de la masse totale, ce qui d\u00e9finit l’alliage comme de l’or 18 carats<\/strong>. <\/p>\n

L’inclusion de l’argent contribue \u00e0 un ton plus clair et \u00e0 une plus grande mall\u00e9abilit\u00e9, tandis que le cuivre ajoute de la chaleur \u00e0 la couleur et am\u00e9liore consid\u00e9rablement la duret\u00e9. L’\u00e9quilibre exact entre ces m\u00e9taux permet aux orf\u00e8vres d’affiner \u00e0 la fois le profil de la couleur<\/strong> et les propri\u00e9t\u00e9s de<\/strong> l’alliage. <\/p>\n

Une fois homog\u00e9n\u00e9is\u00e9 par une fusion contr\u00f4l\u00e9e et un m\u00e9lange ad\u00e9quat, le m\u00e9tal en fusion est coul\u00e9 sous une forme exploitable. \u00c0 partir de l\u00e0, l’or 18 carats peut \u00eatre trait\u00e9 \u00e0 l’aide de techniques traditionnelles telles que le laminage, le forgeage, le soudage et le sertissage de pierres<\/strong>, afin de cr\u00e9er des bijoux durables et raffin\u00e9s. <\/p>\n

La ma\u00eetrise de ce processus d’alliage est une pierre angulaire de l’orf\u00e8vrerie, qui exige non seulement des mesures pr\u00e9cises, mais aussi une connaissance approfondie du comportement des m\u00e9taux \u00e0 haute temp\u00e9rature<\/strong>, afin de garantir un r\u00e9sultat coh\u00e9rent et de haute qualit\u00e9, adapt\u00e9 \u00e0 la production de bijoux professionnels.<\/p>\n","protected":false},"excerpt":{"rendered":"

La fusion de l’or fin avec l’argent et le cuivre est un proc\u00e9d\u00e9 d’orf\u00e8vrerie fondamental utilis\u00e9 pour cr\u00e9er l’or 18 carats (or 750). L’alliage de 9 grammes d’or pur avec des quantit\u00e9s soigneusement mesur\u00e9es d’argent et de cuivre permet d’obtenir un total de 12 grammes d’or 18 carats . Cette composition \u00e9quilibr\u00e9e renforce la durabilit\u00e9 tout en pr\u00e9servant la riche couleur de l’or, ce qui en fait un mat\u00e9riau id\u00e9al pour la fabrication de bijoux de haute qualit\u00e9. [...]<\/p>","protected":false},"featured_media":3118,"template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[67],"product_tag":[],"class_list":{"0":"post-3114","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-trucs-et-astuces","7":"desktop-align-left","8":"tablet-align-left","9":"mobile-align-left","11":"first","12":"instock","13":"virtual","14":"taxable","15":"purchasable","16":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/4h-jewellery-tutorials.com\/fr\/wp-json\/wp\/v2\/product\/3114","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/4h-jewellery-tutorials.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/4h-jewellery-tutorials.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/4h-jewellery-tutorials.com\/fr\/wp-json\/wp\/v2\/media\/3118"}],"wp:attachment":[{"href":"https:\/\/4h-jewellery-tutorials.com\/fr\/wp-json\/wp\/v2\/media?parent=3114"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/4h-jewellery-tutorials.com\/fr\/wp-json\/wp\/v2\/product_brand?post=3114"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/4h-jewellery-tutorials.com\/fr\/wp-json\/wp\/v2\/product_cat?post=3114"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/4h-jewellery-tutorials.com\/fr\/wp-json\/wp\/v2\/product_tag?post=3114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}