{"id":5425,"date":"2026-07-01T17:09:42","date_gmt":"2026-07-01T15:09:42","guid":{"rendered":"https:\/\/levosil.com\/?p=5425"},"modified":"2026-07-01T17:16:43","modified_gmt":"2026-07-01T15:16:43","slug":"how-long-can-desiccant-bags-stay-exposed-to-air","status":"publish","type":"post","link":"https:\/\/levosil.com\/en\/how-long-can-desiccant-bags-stay-exposed-to-air\/","title":{"rendered":"How long can desiccant bags stay exposed to air?"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1030\" height=\"562\" src=\"https:\/\/levosil.com\/wp-content\/uploads\/2026\/07\/Sacchetti-aperti-1-1030x562.jpg\" alt=\"\" class=\"wp-image-5423\" srcset=\"https:\/\/levosil.com\/wp-content\/uploads\/2026\/07\/Sacchetti-aperti-1-1030x562.jpg 1030w, https:\/\/levosil.com\/wp-content\/uploads\/2026\/07\/Sacchetti-aperti-1-300x164.jpg 300w, https:\/\/levosil.com\/wp-content\/uploads\/2026\/07\/Sacchetti-aperti-1-768x419.jpg 768w, https:\/\/levosil.com\/wp-content\/uploads\/2026\/07\/Sacchetti-aperti-1-705x385.jpg 705w, https:\/\/levosil.com\/wp-content\/uploads\/2026\/07\/Sacchetti-aperti-1.jpg 1408w\" sizes=\"auto, (max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This is one of the questions we are asked most often: how long can a desiccant bag remain exposed to air before being used?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The basic rule is simple:&nbsp;<strong>as little as possible.<\/strong>&nbsp;As soon as they are removed from their packaging, desiccant bags immediately begin absorbing moisture from the surrounding environment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why there is no fixed time<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It is not possible to determine in advance how quickly a bag will become saturated, because its absorption capacity depends on several variable factors:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>the\u00a0<strong>relative humidity<\/strong>\u00a0of the environment;<\/li>\n\n\n\n<li>the\u00a0<strong>temperature<\/strong>\u00a0it is exposed to.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A concrete example: in winter, when the air is drier, the bags saturate more slowly. In summer, especially on a rainy, humid day, the same bag can saturate much faster. This is why there is no universally valid figure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The role of the envelope (fabric)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Beyond ambient conditions, the speed at which a bag saturates is mainly governed by the&nbsp;<strong>type of envelope<\/strong>&nbsp;wrapping it. A standard fabric envelope (under DIN 55473 this corresponds to&nbsp;<strong>Type A<\/strong>) lets water vapour through more quickly, so it saturates sooner. A&nbsp;<strong>Type B<\/strong>&nbsp;(low dust) or&nbsp;<strong>Tyvek\u00ae<\/strong>&nbsp;bag will take longer to saturate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Important: molecular sieves are a special case<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This rule does not apply to&nbsp;<strong>molecular sieve<\/strong>&nbsp;desiccant bags. Molecular sieve is an extremely moisture-hungry desiccant and absorbs water vapour from the environment very rapidly. In these cases it is essential to keep exposure times very short or to work in a controlled environment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How to store them correctly<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the bags are not used immediately, follow a few precautions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>keep them in their original packaging, with the plastic bag we supply folded over the top;<\/li>\n\n\n\n<li>when the product is returned to the warehouse, the ideal solution is to\u00a0<strong>heat-seal the HDPE bag<\/strong>\u00a0protecting the desiccants inside the box;<\/li>\n\n\n\n<li>alternatively, close the bag with a cable tie or a knot.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This prevents ambient moisture from saturating the bags during storage and periods of non-use, before they are even put to work.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The principle to remember is always the same:&nbsp;<strong>the less time exposed to air, the more effective the product.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is one of the questions we are asked most often: how long can a desiccant bag remain exposed to air before being used? The basic rule is simple:&nbsp;as little as possible.&nbsp;As soon as they are removed from their packaging, desiccant bags immediately begin absorbing moisture from the surrounding environment. Why there is no fixed [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":5423,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[41,45,63,42],"class_list":["post-5425","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-desiccant","tag-desiccant-bags","tag-how-to","tag-silica-gel"],"_links":{"self":[{"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/posts\/5425","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/comments?post=5425"}],"version-history":[{"count":1,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/posts\/5425\/revisions"}],"predecessor-version":[{"id":5426,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/posts\/5425\/revisions\/5426"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/media\/5423"}],"wp:attachment":[{"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/media?parent=5425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/categories?post=5425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/tags?post=5425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}