{"id":1564,"date":"2024-11-25T15:18:00","date_gmt":"2024-11-25T14:18:00","guid":{"rendered":"https:\/\/www.scouts-europe.org\/scoutorama\/?p=1564"},"modified":"2025-02-11T14:56:26","modified_gmt":"2025-02-11T13:56:26","slug":"les-encres-sympathiques","status":"publish","type":"post","link":"https:\/\/www.scouts-europe.org\/scoutorama\/les-encres-sympathiques\/","title":{"rendered":"Les encres sympathiques"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1564\" class=\"elementor elementor-1564\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8041808 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8041808\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7caf085\" data-id=\"7caf085\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4eb47f7 elementor-widget elementor-widget-heading\" data-id=\"4eb47f7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Les encres sympathiques<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-721ab5e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"721ab5e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d46eb97\" data-id=\"d46eb97\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c306bc5 elementor-widget elementor-widget-spacer\" data-id=\"c306bc5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f4c36d elementor-widget elementor-widget-text-editor\" data-id=\"4f4c36d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div id=\"chapo_article\"><div id=\"chapo_article li\"><div id=\"chapo\" class=\"coul_dominante\"><div id=\"chapo_article\"><div id=\"chapo_article li\"><p>Tous les syst\u00e8mes cod\u00e9s ont l\u2019inconv\u00e9nient de ne pas toujours dissimuler le caract\u00e8re secret du message qu\u2019ils camouflent.<\/p><\/div><\/div><\/div><div id=\"ArticleText\"><p>Ainsi en temps de guerre, le monsieur qui re\u00e7oit un texte incompr\u00e9hensible peut fort bien \u00eatre amen\u00e9 \u00e0 s\u2019en expliquer, si on l\u2019a d\u00e9couvert par hasard. C\u2019est pourquoi les services d\u2019espionnage ont \u00e9t\u00e9 amen\u00e9s \u00e0 mettre au point des encres sympathiques qui ne laissent aucune trace sur le papier.<\/p><p>Naturellement, on ne commettra pas la maladresse d\u2019exp\u00e9dier une feuille blanche\u00a0: le truc serait tout de suite \u00e9vent\u00e9. De plus il faut choisir un papier mat et pas trop blanc.<\/p><p>Les plus anciennes encres sympathiques se r\u00e9v\u00e8lent tout simplement \u00e0 la chaleur. Ce sont le jus de citron, d\u2019oignon, de navet, du lait, de l\u2019urine m\u00eame.<\/p><p>Pour r\u00e9v\u00e8ler le message, on tient le papier au-dessus d\u2019une source de chaleur (po\u00eale, lampe \u00e0 alcool,\u2026) et le texte appara\u00eet. Mais pour cela, il ne faut pas h\u00e9siter \u00e0 chauffer le papier jusqu\u2019\u00e0 le br\u00fbler. Il faut toutefois \u00eatre tr\u00e8s prudent pour ne pas laisser le papier s\u2019enflammer. Fais \u00e7a dehors, et veille, le cas \u00e9ch\u00e9ant, \u00e0 avoir un point d\u2019eau \u00e0 proximit\u00e9. Tu peux aussi mettre le document quelques minutes \u00e0 four chaud.<\/p><p>Un syst\u00e8me qui donne de bons r\u00e9sultats est d\u2019\u00e9crire le message avec de la salive. Le r\u00e9v\u00e9lateur \u00e0 employer dans ce cas est l\u2019encre ordinaire, bleue par exemple, dont on badigeonne largement la feuille avec un gros pinceau. Le texte \u00e9crit \u00e0 la salive retiendra l\u2019encre et se lira tr\u00e8s bien.<\/p><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Tous les syst\u00e8mes cod\u00e9s ont l\u2019inconv\u00e9nient de ne pas toujours dissimuler le caract\u00e8re secret du message qu\u2019ils camouflent.<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","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":"","theme-transparent-header-meta":"","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":""}},"footnotes":""},"categories":[64,24],"tags":[],"class_list":["post-1564","post","type-post","status-publish","format-standard","hentry","category-codes-secrets","category-transmissions"],"_links":{"self":[{"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/posts\/1564","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/comments?post=1564"}],"version-history":[{"count":13,"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/posts\/1564\/revisions"}],"predecessor-version":[{"id":6614,"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/posts\/1564\/revisions\/6614"}],"wp:attachment":[{"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/media?parent=1564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/categories?post=1564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.scouts-europe.org\/scoutorama\/wp-json\/wp\/v2\/tags?post=1564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}