Getting the correct length of a foam pump or atomiser is really important to the final look and function of the pack. The terminology can be a bit confusing, so here are the common ways of measuring a diptube length:
The total height of the bottle should be broadly the same as the Seal To Tip measurement, so for this reason Richmond uses this measurement when specifying. However, the length can change depending on other factors, so it is best to test first!
A wrongly-specified diptube could mean that the tube is too long and effectively seals against the container, meaning a viscous product cannot be drawn up the tube. An overly-long diptube can also cause trouble on filling, as excessive force is needed to push the pump onto the bottle, and could also cause stress to the pump engine, leading to the pump failing. The aesthetics of the pack could also be affected - a straight diptube may look better than a curved one. Finally, a diptube which is too short could result in the consumer unable to empty all the product from the bottle and could cause complaints.
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