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Old 10-07-2008, 03:08 AM   #11
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I know it's a little late, but for future reference, this is what I used the first time I did an all-grain. (The link takes you directly to the iodine page, but the entire 'Wanna Mash' thing is pretty good)

Listermann.Com - So you Wanna Mash Page

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Old 10-07-2008, 05:31 PM   #12
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Yep, iodophore works (which is good, since iodine is tougher to find due to meth lab scare). I've never tried the sidewalk chalk. My kids go through it too fast. However, I use either a saucer or the lid of a bucket. I put a drop or so of iodophore on there and a drop of mash liquor and tease the two together.


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Old 10-07-2008, 05:49 PM   #13
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Quote:
Originally Posted by ifishsum View Post
It turns black with starch, if it's fully converted the color will stay yellow/orange.



BTW, I've been wondering - is there any reason one could not use a drop of Iodophor to perform this test?

I use it all the time...it works fine for the iodine test.
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Old 10-07-2008, 06:08 PM   #14
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I wouldn't worry about it. If you mash for 60 minutes at a decent temperature (150-156, depending on the maltiness you want), it will very likely be fully converted. I've never done an iodine test and probably won't ever do one.
I used to think this way. I tried one time after I had a low gravity. It proved to be beneficial because several times after 60 minutes I have found starch in the mash.
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Old 10-08-2008, 01:10 PM   #15
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Quote:
Originally Posted by Schlenkerla View Post
I used to think this way. I tried one time after I had a low gravity. It proved to be beneficial because several times after 60 minutes I have found starch in the mash.
I agree. Do the test!

I had a mash, once time, that went for an hour. I figured I was good to go, but went ahead and did the test. It turned VERY purple to my great surprise. It turned out my thermometer was messed up and I had been mashing somewhere around 140ish for an hour - not a whole lot of converting goin' on there. A couple gallons of boiling water and a bit more time later, I was all fine. However, had I just started lautering, I would have been VERY unhappy with the results.

An iodine/iodophore test is a quick, simple, and reliable check on how things are going. There is no good reason to skip it. If you find yourself just out of the stuff, at least give your wort a taste to see if is starchy.


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Old 10-09-2008, 11:54 AM   #16
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Quote:
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An iodine/iodophore test is a quick, simple, and reliable check on how things are going. There is no good reason to skip it.
Plus it lets you get your Jr Scientist groove on.
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Old 10-09-2008, 12:06 PM   #17
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When using the iodophor, do you use it straight from the bottle or diluted?

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Old 10-09-2008, 02:41 PM   #18
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Straight from the bottle.


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Old 10-09-2008, 03:25 PM   #19
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When using the iodophor, do you use it straight from the bottle or diluted?


I dilute it about 1:5 with water or ethanol.

Here is a cool series of iodine tests I took on a piece of drywall for one of my batches. I generally don’t go that far and take repeated samples. Just at the end of the mash to be safe:



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Old 10-09-2008, 03:27 PM   #20
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Quote:
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When using the iodophor, do you use it straight from the bottle or diluted?
I use it straight, with an eye dropper.
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