Like other spirits, gin is subject to various filtration processes to ensure a clean, high-quality spirit. Between distillation stages, gin undergoes distil filtration, where is passes through particle filters and activated carbon blocks to ensure the removal of any contaminants.
This is a vital process in the creation of gin, for this process is often repeated multiple times to reduce the easily achieved build up of particles and organics such as chlorine. In turn, this eliminates haze, adjusts colours, softens flavours, especially during the production of Sloe Gin, where further filtration is required to remove the ‘pith’ that forms.
Distil filtration can even correct the colour of gin that has been contaminated with copper sulphide during distillation, for this reaction often results in the still taking on a blue hue that is undesirable to distillers and consumers alike.