Iodine Starch Testing and Defining Mash Conversion

TroubleShooting

Andrew Robb — Sydney, Australia asks,

I’ve been brewing for a few years now and have very recently joined up with BYO. In the last few days I’ve reviewed the Double IPA recipe listings, which look really good and I’m gearing up to start my first clone attempt. In the instructions is the phrase “until the enzymatic conversion is complete.” Problem is I’ve never heard that phrase before so could you help by explaining what it means and advising how I can tell when it’s complete.