Introduction Droppers let users take a small amount of liquid from a bottle and dispense it drop by drop or by volume. For pharmaceutical and similar liquid products, the choice of dropper affects dosing, hygiene, closure safety and compatibility with the formulation. This article covers the main dropper types, the options for each part, and…
A dropper dispenses small amounts of liquid in a controlled way, a few drops at a time. The most common uses are liquid supplements, essential oils, cosmetic serums and oils, and oral or eye and ear liquids packed in small bottles. Droppers are also used in laboratories and in crafts such as inks and colourants….
Why density matters before filling Density is the mass of a liquid per unit volume, usually given in g/ml (g/cm³). Bottles are labelled by volume, but many filling lines dose by weight. Converting between the two requires the density of the product. For example, 30 ml of a liquid with a density of 0.92 g/ml…
Why thread measurement matters A cap seals only if its thread matches the thread on the bottle neck. Two necks can look the same and still not fit, because diameter, pitch and thread profile all have to match. Knowing how thread is measured helps you specify the right closure and avoid ordering parts that do…
Introduction Glass is widely used for medicines because it is chemically stable, does not absorb the contents and is a very good barrier to gases and moisture. Not all pharmaceutical glass is the same, though. Pharmacopoeias such as the European Pharmacopoeia classify it into types according to chemical (hydrolytic) resistance. This article explains the main…
Introduction There is no single standard size for pharmaceutical bottles. Sizes depend on the product (oral liquid, drops, tablets, cream), the market and the dosing regime. For small liquid products dispensed with a dropper, a fairly consistent range of sizes is used. This article covers those sizes and what to consider when choosing one. Common…
Introduction A dropper pipette is a simple part, but it has to meet several requirements at once. The tip must be smooth, the length must suit the bottle, and the top must hold the teat securely. This article explains how glass pipettes for dropper bottles are generally made and how they are combined with a…
Droppers come in sizes that match the bottle they fit, and for standard dropper bottles the key size is the DIN18 (GL18) thread. A DIN18 dropper fits DIN18 bottles of 5, 10, 15, 20, 30, 50 and 100 ml, while the glass pipette inside is cut to a length that suits the bottle height. Thread…
AI assistant – answers may contain mistakes. Prices and stock are checked live in the shop.
