1.0Vũ Lê Techhttps://vuletech.com/en/adminhttps://vuletech.com/en/author/admin/rich600338<blockquote class="wp-embedded-content" data-secret="aTHVLvvkDm"><a href="https://vuletech.com/en/giai-phap/handling-hazardous-and-flammable-dust/">HANDLING HAZARDOUS AND FLAMMABLE DUST</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://vuletech.com/en/giai-phap/handling-hazardous-and-flammable-dust/embed/#?secret=aTHVLvvkDm" width="600" height="338" title="“HANDLING HAZARDOUS AND FLAMMABLE DUST” — Vũ Lê Tech" data-secret="aTHVLvvkDm" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !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); /* ]]> */ </script> [vc_row][vc_column][vc_column_text]Ink is a very fine and toxic dust that contains carbon particles, iron oxides and resins. Ink is used in printers, copiers and fax equipment. Initially the ink consisted of only coal dust, then it was combined with a polymer to improve the quality. Printing ink consists of Airborne particles whose sizes can vary from