{"version":"1.0","provider_name":"Museo de Ecolog\u00eda Humana","provider_url":"https:\/\/museoecologiahumana.org\/en\/","title":"Invisible inks - Museo de Ecolog\u00eda Humana","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"Jk1FkmrJiO\"><a href=\"https:\/\/museoecologiahumana.org\/en\/obras\/invisible-inks\/\">Invisible inks<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/museoecologiahumana.org\/en\/obras\/invisible-inks\/embed\/#?secret=Jk1FkmrJiO\" width=\"600\" height=\"338\" title=\"&#8220;Invisible inks&#8221; &#8212; Museo de Ecolog\u00eda Humana\" data-secret=\"Jk1FkmrJiO\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/museoecologiahumana.org\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","thumbnail_url":"https:\/\/museoecologiahumana.org\/wp-content\/uploads\/2024\/12\/11-scaled.jpg","thumbnail_width":2560,"thumbnail_height":1597,"description":"II Ink colours The necessity to conceal specific messages led to the invention of methods for writing texts that would remain hidden until they reached their intended recipient. These inks, known as \u00absympathetic\u00bb, were made from ingredients that only reacted with certain materials or conditions (the Greek idea of sympatheia refers here to the affinity... View Article"}