{"version":"1.0","provider_name":"Mehach","provider_url":"https:\/\/www.mehach.com\/en\/","author_name":"anh","author_url":"https:\/\/www.mehach.com\/en\/author\/anh\/","title":"My Collection of Rotring Compasses and Isographs - Mehach","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"5H7cG9eeaZ\"><a href=\"https:\/\/www.mehach.com\/en\/my-collection-of-rotring-compasses-and-isographs-4397\/\">My Collection of Rotring Compasses and Isographs<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.mehach.com\/en\/my-collection-of-rotring-compasses-and-isographs-4397\/embed\/#?secret=5H7cG9eeaZ\" width=\"600\" height=\"338\" title=\"&#8220;My Collection of Rotring Compasses and Isographs&#8221; &#8212; Mehach\" data-secret=\"5H7cG9eeaZ\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\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:\/\/www.mehach.com\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/www.mehach.com\/wp-content\/uploads\/2026\/01\/IMG_1972-scaled.jpeg","thumbnail_width":2560,"thumbnail_height":1834,"description":"While doing illumination &amp; sacred geometry work, I realized I had no tools to properly draw a circle and fill it with gesso. I did some research and came across precision drawing tools intended for engineers and architects. One brand particularly caught my attention: Rotring, a German brand (which has since become American). In the past, drawing tools were limited (pens, brushes, pencils). Architects and engineers mainly used ruling pens, which allowed them to draw lines of constant thickness. These instruments had the additional advantage of being adaptable to a compass, which proved very practical for drawing windows, arcades, etc., as in my example. Later, isographs (technical pens) appeared. These pens work with ink and offer a line of regular thickness with very little pressure. Unlike ruling pens, they don&#8217;t cause accidental stains and don&#8217;t require constant ink refilling. Their ingenious design even allows for the purchase of spare parts. These instruments are so robust that they can last about thirty years without any problem, which explains their high price. Rotring College Set I was able to get my hands on a set on Vinted (search for Rotring College Set, you can also buy new on Amazon but it&#8217;s more..."}