Variant: Plastová pumpička, biela, hadička 130 mm, 28/410
Very good quality
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Closures DIN28
The plastic pump with 28/410 thread is a dispensing closure for bottles with liquid and semi-viscous products. full description
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The plastic pump with 28/410 thread is a dispensing closure for bottles with liquid and semi-viscous products. A single press delivers a measured dose, allowing one-handed dispensing without opening the bottle and without unnecessary contact between the contents, air, and fingers. It is ideal for liquid soaps, shower gels, shampoos, conditioners, and body lotions, as well as household cleaning products such as washing-up liquid.
The pump material is suitable for contact with cosmetic products.
One full press delivers approximately 1 ml of product. The actual dose depends on the viscosity of the contents: thicker products dispense slightly less and more slowly. The repeatable dose makes it easy to estimate usage and to recommend a number of presses per application on the label.
Before first use, the pump should be pressed several times without product until the dip tube and mechanism are primed. Only then will it dispense evenly.
It is worth testing a new formula with the pump before filling an entire batch. Simply fill one bottle and check whether the product draws up, whether it dispenses smoothly, and whether it dries out at the pump nozzle after a few days.
The pump works best with products that flow freely:
Less suitable are thick creams, butters, and gels that hold their shape, as well as products containing solid particles, such as scrubs with salt, sugar, or ground kernels. Particles may clog the valve and prevent the pump from dispensing.
The designation 28/410 describes the neck the pump fits: the first number is the neck diameter in millimetres, the second indicates the thread type. Both values must match; a bottle with a 28 mm neck but a different thread type will not seal. Bottles with the same neck type and ready-made bottle-and-pump combinations are available from Handymade. For a custom combination, we recommend verifying the seal, dispensing performance, and compatibility of the closure with the specific formula.
The dip tube should reach just above the bottom of the bottle. If it is too long for the chosen bottle, trim it with sharp scissors, preferably at a diagonal cut. This prevents the end from suctioning against the bottom so that the product can be drawn up almost completely.
The bottle is filled to the nominal volume, not to the brim. The nominal volume is the quantity for which the bottle is designed under standard filling conditions; the total brim-full volume is its physical capacity right up to the neck. The difference between the two forms a headspace that, with a pump, is taken up by the mechanism body and dip tube. If the bottle is overfilled, product will leak through the thread when the pump is screwed on.
Before the first fill it is recommended to flush the pump: pump warm water through it several times, then isopropyl alcohol or ethanol, and allow it to dry completely. Any residual water in the mechanism would otherwise find its way into the product.
The pump is made of polypropylene. For products with a high proportion of essential oils, alcohol, or solvents, it is advisable to check beforehand whether the contents attack the plastic and whether the pump still seals and dispenses correctly after several weeks.
With products that dry out or crystallise on exposure to air, a plug may form at the pump nozzle. Rinsing the nozzle with warm water usually resolves this.
Variant: Plastová pumpička, biela, hadička 130 mm, 28/410
Very good quality
Translated automatically