{"id":104770,"date":"2023-04-13T16:22:18","date_gmt":"2023-04-13T14:22:18","guid":{"rendered":"https:\/\/www.packaging.si\/how-do-you-troubleshoot-common-issues-with-droppers-for-pharmaceutical-bottles\/"},"modified":"2026-10-26T10:35:10","modified_gmt":"2026-10-26T10:35:10","slug":"how-do-you-troubleshoot-common-issues-with-droppers-for-pharmaceutical-bottles","status":"publish","type":"post","link":"https:\/\/www.packaging.si\/da\/how-do-you-troubleshoot-common-issues-with-droppers-for-pharmaceutical-bottles\/","title":{"rendered":"How do you troubleshoot common issues with droppers for pharmaceutical bottles?"},"content":{"rendered":"<p>Most problems with droppers for pharmaceutical and similar bottles can be fixed by checking four things: the seal between collar and bottle, the fit of the pipette and teat, the compatibility of the teat with the liquid, and the user&#8217;s technique. Leaks, weak suction, dripping and sticking caps usually have a simple cause once you know where to look.<\/p>\n<h2>Leaking at the neck or collar<\/h2>\n<p>If liquid seeps out around the cap, first check that the collar is fully tightened. Then look at the bottle rim for chips or dirt, which prevent a good seal. Make sure the thread of the collar and the bottle match, as DIN18 droppers should only be used on DIN18 necks. If a tamper-evident or child-resistant collar is used, it must be turned until it clicks or locks. Overfilling is another cause: leave a little headspace so that the pipette does not displace liquid upwards when it is inserted.<\/p>\n<h2>Dropper does not draw up liquid<\/h2>\n<ul>\n<li>Teat cracked or perished: replace it, because a small hole stops suction.<\/li>\n<li>Teat not seated on the pipette: push it on firmly until it grips the glass.<\/li>\n<li>Pipette too short for the bottle: the tip must reach the liquid, so check the pipette length matches the bottle volume.<\/li>\n<li>Blocked tip: thick or crystallised liquid may be blocking the opening, so clean it carefully.<\/li>\n<li>Very low liquid level: tilt the bottle so that the tip reaches the remaining product.<\/li>\n<\/ul>\n<h2>Dripping after use<\/h2>\n<p>A drip from the tip is normal if the pipette is held tilted or warmed by the hand. Keep the dropper vertical when removing it from the bottle, and release the teat slowly so that no air is pushed back. Low-viscosity liquids and volatile solvents drip more readily. A rounded ball tip helps to produce a clean drop, but the liquid properties are decisive.<\/p>\n<h2>Teat swelling, softening or sticking<\/h2>\n<p>Some formulations, especially those with essential oils, solvents or alcohol, can affect rubber. NBR and TPE teats differ in resistance, so a teat that suits one formula may deteriorate in another. Signs include stickiness, swelling, a change of colour or an unusual smell. Run a compatibility and stability test with your actual product, and choose the teat material accordingly.<\/p>\n<h2>Pipette difficult to insert or remove<\/h2>\n<p>If the pipette catches on the bottle neck, check that the collar and pipette are aligned and that the pipette is not bent or too wide for the opening. A pipette that is too tight may indicate a mismatch between collar and bottle. Never force glass components.<\/p>\n<h2>Troubleshooting checklist<\/h2>\n<ol>\n<li>Inspect the bottle neck and collar for damage or contamination.<\/li>\n<li>Confirm the thread is DIN18 on both parts.<\/li>\n<li>Check the pipette length against the bottle size.<\/li>\n<li>Examine the teat for cracks, swelling or looseness.<\/li>\n<li>Test the closure with water before filling a batch.<\/li>\n<li>Run stability tests with the real formula.<\/li>\n<\/ol>\n<h2>Ofte stillede sp\u00f8rgsm\u00e5l<\/h2>\n<h3>How often should a dropper teat be replaced?<\/h3>\n<p>There is no fixed interval. Replace it when it shows cracks, hardening or loss of suction. For finished products, shelf-life testing shows how long the teat performs.<\/p>\n<h3>Can a dropper be repaired?<\/h3>\n<p>The components can be replaced individually. If the bottle contains medicine, check with a pharmacist before changing parts.<\/p>\n<h3>Why does the liquid darken near the teat?<\/h3>\n<p>Contact with the teat material or vapour may be involved. Test alternative teat materials and keep the bottle upright.<\/p>\n<h2>Choosing droppers for your product<\/h2>\n<p>Many dropper problems can be prevented at the selection stage by matching the thread, pipette length and teat material to the product. Packaging.si offers NBR and TPE teats, several collar types and pipettes matched to bottle sizes from 5 to 100 ml, and free samples are available for compatibility testing before you order.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.packaging.si\/da\/vare-kategori\/dele-komponenter\/\">Replacement parts and components<\/a><\/li>\n<li><a href=\"https:\/\/www.packaging.si\/da\/byg-din-draabetaeller\/\">Build your dropper set<\/a><\/li>\n<li><a href=\"https:\/\/www.packaging.si\/da\/kontakt-os\/\">Ask for free samples<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Most problems with droppers for pharmaceutical and similar bottles can be fixed by checking four things: the seal between collar and bottle, the fit of the pipette and teat, the compatibility of the teat with the liquid, and the user&#8217;s technique. Leaks, weak suction, dripping and sticking caps usually have a simple cause once you&#8230;<\/p>","protected":false},"author":1,"featured_media":107640,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[216],"tags":[],"class_list":["post-104770","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-droppers-and-pipettes"],"_links":{"self":[{"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/posts\/104770","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/comments?post=104770"}],"version-history":[{"count":1,"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/posts\/104770\/revisions"}],"predecessor-version":[{"id":901985,"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/posts\/104770\/revisions\/901985"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/media\/107640"}],"wp:attachment":[{"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/media?parent=104770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/categories?post=104770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.packaging.si\/da\/wp-json\/wp\/v2\/tags?post=104770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}