Short answer Standard dropper teats are not designed for contact with acetone. Acetone is a strong solvent, and many common elastomers swell, soften, harden or crack when exposed to it. The most reliable prevention is to choose a compatible material and to test it with your own liquid. Coatings and handling tricks are only a…
Introduction Hydrogen peroxide is a strong oxidiser. Elastomer teats that are in prolonged contact with it, or with its vapour, can harden, crack, swell or turn sticky. This article explains what drives that damage and what you can do to limit it. Why hydrogen peroxide damages teats Oxidisers attack the polymer chains in many elastomers….
Why teat cleaning matters The teat is the part of a pipette dropper that you squeeze to draw liquid into the glass pipette. It is in contact with the pipette and often with the contents, so residue on it can affect the next fill. This guide covers how to clean teats for DIN18 (GL18) droppers…
Introduction A glass pipette for droppers and a graduated cylinder both handle liquids, but they are designed for different jobs. The pipette is part of a dispensing closure that takes liquid from a bottle and releases it in drops or small doses. The cylinder is a stand-alone vessel for measuring a volume. This article compares…
Introduction A glass pipette for a dropper and a Pasteur pipette look similar, because both are narrow glass tubes with a tapered tip. They are made for different jobs, though. This article explains how they differ and which one suits which application. What is a Pasteur pipette? A Pasteur pipette is a simple laboratory tool…
Overview The two names sound similar, but the tools do different jobs. A glass dropper pipette is part of a dropper closure on a bottle and dispenses liquid by the drop or in approximate doses. A micropipette is a laboratory instrument for measuring and transferring precisely set volumes. This article explains how they differ and…
Introduction The terms “Pasteur pipette” and “glass pipette for droppers” are often mixed up, because both are thin glass tubes that draw up and release liquid with a rubber bulb. They are made for different purposes, though. A Pasteur pipette is a laboratory tool. A dropper pipette is one component of a bottle closure, used…
Introduction A glass pipette in a dropper closure is a dosing aid, not laboratory volumetric glassware. The volume it draws depends on the pipette, the teat, the liquid and how the user squeezes. If your product depends on a defined dose, check the pipette under realistic conditions instead of relying on the graduation marks alone….
“Filling a dropper” can mean two things: filling the bottle with liquid, or drawing liquid into the glass pipette of an assembled dropper. This guide covers both, with notes on accuracy and common mistakes. Drawing liquid into a dropper pipette An assembled dropper consists of a teat (the rubber bulb), a collar and a glass…
Introduction A glass pipette cannot be adjusted like a laboratory instrument, so “calibrating” it in practice means checking how much liquid it actually delivers and recording the result. This is useful if you fill or label dropper bottles and want to state a fill level or an approximate drop size. Graduation marks on a dropper…
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