I think I have been told that you can use copha instead of coconut oil. is this true & do you just substitute the amount in grams? Would you melt it first?
I did a quick search on Copha and found it is made up of 98% hydrogenated coconut oil and 2% soyabean lethicin.
I would imagine that you could use it just like you would coconut oil but I've never used it myself so I'm not positive of the outcome.
I did read that lecithin can cause the soap batter to thicken making you think the soap has traced when in fact it has not so you will have to be careful with that.
Lecithin also has a SAP value of 110 - 140 whereas coconut oil has a SAP value of 250 - 270 so give yourself a bit of a bigger superfat than normal or you might end up with a slightly lye heavy soap.