One reference for the words that surround the water in a bottle of whisky. Here are plain-English definitions of blending water, proofing, cut points, ABV and proof, and cask strength — the terms distillers, buyers and enthusiasts trip over most — each tied to what actually happens between the still and the glass.
There is no single magic number, but the science and the master blenders agree on a useful anchor — roughly 80% whisky to 20% water — and on how far each style will bend from it. Here is a ratio guide for bourbon, single malt Scotch, and Indian single malt, and why the water you pour matters as much as the amount.
Proofing is the last thing a distillery does to a whisky before it goes in the bottle, and it is easy to get wrong. This is how commercial producers cut cask-strength spirit down to bottling strength — the water they use, why they add it slowly, and the defects that appear when they don't.
Adding water to whisky is not a beginner's crutch — it is what master blenders do every day. Here is how to dilute a dram properly at home, how much water to add, and which water actually improves the glass rather than flattening it.
A distillery's famous spring rarely ends up in the bottle. Here is what actually happens between source and bottling line — the two very different waters a distillery uses, the reverse-osmosis-and-deionisation train that strips one of them to near-nothing, and the two parts per million of calcium that can wreck a batch.
The number on the label is the story of how much water a distillery already added — and how much is left for you to add. Here is what cask strength and bottled strength really mean, why the reduction happens at all, and the chemistry behind the drop of water that transforms a glass.