When mixing a gin with a mixer, a gin can sometimes turn a milky, hazy colour. This happens when the oils and flavour compounds, which have been held in suspension by the alcohol, are suddenly freed from suspension releasing their flavours and visible oils. There are some gins that louche and many more that don’t. Louching is not a reflection on ... Found on https://thegincooperative.com/the-complete-glossary-of-scottish-gin/