Importance of Iodine value?

[Best Natural Soap]

what's the importance of the iodine value that soapcalc gives?

 

[agriffin]

http://soapcalc.net/info/soapqualities.asp

"Iodine - As a general rule, the lower the number, the harder the bar and the less the conditioning qualities and vice versa. A recipe with iodine values higher than 70 will tend to produce a somewhat soft bar of soap. Definition: number of grams of iodine that will react with the double bonds in 100 grams of fats or oils."

 

[ToniD]

I read somewhere that iodine values of higher than 70 will produce DOS--but I have not seen it written anywhere else.

I have been wondering if that is so?