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I'm trying to understand how to properly prepare hand pulled noodles. I've read about Kansui and Lye water and in some instances I've read that they serve a similar purpose. However, after some reading, it seems that kansui could potentially affect the dough differently than lye water. Some expert insight into this would be appreciated very much.

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What is kansui? – Blessed Geek Sep 5 '12 at 3:26
    
The link TFDs comment explains kansui. Thank you for the link TFD I'll review – Theorian Sep 6 '12 at 6:22

In accordance to this page the lye water only has a minor effect on the ability to pull the noodles:

http://www.lukerymarz.com/noodles/ingredients.html

Lye water is supposed to be the secret ingredient in hand pulled noodles. I've tried recipes with it and without it, and it does not make the dough any easier to pull. In fact, if you use too much of it, you'll make the dough IMPOSSIBLE to pull. Something about the basic nature of it causes the gluten to tighen up. Adding lye water or baking soda at about 1% (more will ruin the dough) will adjust the texture of the noodles a bit. The flavor is supposed to be slightly different, too, but I haven't noticed a difference.

Your question is from 2012. What did you learn from your experiments? :)

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Kansui is a mixture of sodium carbonate and potassium carbonate, both alkaline. Since lye is also alkaline, it could serve a similar function in the dough but it would depend on the relative strengths of their alkalinity.

Specifically, alkaline water interfere with enzymes in the flour and thus inhibit the development of gluten, allowing for the dough to be stretched more readily. That being said, you need some gluten development or else the dough won't form.

Alkaline water also will change the color yellow and make the noodles slippery on your tongue. This reaction is the same one that would take when you combine soap with water.

Harold McGee wrote an article in The New York Times about the effects of alkalines.

All this being said, I've only made ramen style noodles, not the hand pulled ones. Your best bet would be to try both and see whether there truly is a difference or not... but I imagine the most traditional method would be to use kansui or jian.

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