Click for more from Wikipedia!) In other words, distilled water should be free of metals, salts, and biological contaminants like bacteria and viruses. This means our products will be free of metals, salts, and contamination, too!
mechanisms of rancidity...) Even in the absence of air, we find oxygen. Oh oxygen, you are so necessary but so annoying! Through the breaking of the double bonds, the oxygens helps the the fatty acids break down...Metal ions in the water at low levels can promote auto-oxidation. This is why we use chelating or sequestering agents like citric acid and EDTA to bind the metals so they won't be a nuisance in our lotions.
Have you ever had a glass of water from your bathroom tap? Do you notice how it always tastes sweet or soapy? My dad - the plumber - explained that years of using soap and toothpaste and so on means we get a tiny build up in the faucet thingie and it tastes funny!
Using distilled water means few opportunities for beasties and metals to ruin your products through contamination and auto-oxidation. You still need to heat and hold your ingredients, but know that you are starting from a really really good place when using distilled water.
As an aside, my town won the award for the best drinking water in the world a few years ago, but I still wouldn't use my tap water in my products. Best drinking water doesn't mean no metal ions and no beasties!
I get mine at my local megamart in the pharmacy section for about $2 for 4 litres (3.75 gallons). Distilled water isn't the greatest drinking water...but don't take my word for it. Try it yourself! Normally I suggest you don't eat or drink our ingredients, but this one is interesting and safe.
Click for more from Wikipedia!) he down side of using deionized water is that the metals and impurities are removed, but the possible contamination by beasties isn't reduced.
And what about Kangen water, the one that claims to be alkaline and better for you? Do not get me started on what a bunch of hooey, hogwash, and blankity-blank-blank this stuff is. Ignore this water. Walk away. Do not believe anything the person with absolutely no chemistry background is saying about their very very expensive water system! (And don't use this in your products - alkaline water can mess up the pH of our products!)
To devotees of Kangen water...please do not comment about how wrong I am about your water. Let's keep it civil. As I always say, please provide me with a good study from a reputable source and I'll take it under consideration.
Rancidity: A primer
Mechanisms of rancidity
What contaminants can get into our products?