15% Superfatting?

[alexander1234]

Hi there,

I've made some batches with 12-15% supperfatting. I'm wondering if someone else did that and with what results.
I used:
10% Castor
20% Coconut
10% Cocoa butter
10% Sunflower
50% Olive
I had an 8% initial SF and added 4-7% Castor oil at trace. I wanted castor oil unsaponified in my soap . Made several batches.
Although I had some silicon moulds I had to freeze it to be able to take the soap out of them. it was very soft at the beginning and took about 3months to get dried. but I am very happy with the result.
Anyone else? what's the risk for DOS?


Alex

 

[lsg]

Unless you hot process and add the Castor oil after the cook, I think the lye is indiscriminate in what oils are saponified. There are some oils that have more unsaponifiables. You might choose oils from that category. I regularly superfat at 5% unless I am making a salt bar and then I superfat it at 20% because I am using mostly coconut oil with a little shea butter. High superfat values can contribute to DOS.

 

[CaliChan]

Ive super-fatted at 25% with my Coconut oil only soap. but like lsg said unless your HP and add the castor oil after the rest of the oils have fully saponified then the lye is going to treat the castor oil just like the rest of the oils and saponify it as well.
I dont know about DOS, ive only had it happen once with a soap that contained canola and they were improperly stored.

 

[MikeInPdx]

Unless you hot process and add the Castor oil after the cook, I think the lye is indiscriminate in what oils are saponified. There are some oils that have more unsaponifiables. You might choose oils from that category. I regularly superfat at 5% unless I am making a salt bar and then I superfat it at 20% because I am using mostly coconut oil with a little shea butter. High superfat values can contribute to DOS.

This.

Although you may luck out because you have some oils with a long shelf life in there as well. It all depends. Good luck.

 

[alexander1234]

Hi,
Thank you for your answers... So... though the trace is reached there is no guarantee that the oil added at trace stays unsaponified...the lye is still active in the batch...
got any idea where I can find a list over the oils that are most and least saponifieble?

Thanks

Alex

 

[lsg]

I believe that olive pomace, avocado oil, & shea oil, have a high percentage of unsaponifiables

 

[alexander1234]

I've made several batches with SF between 12-15%. Soap is fine... soft at the beginning but ok after 3 months. I even used it... it leaves oil traces in the sink/bathtub . I'm going to store it .. see what's going on with it....

 

[DeeAnna]

"...a list over the oils that are most and least saponifieble..."

You already have the list, if you use a soap recipe calculator. The saponification values tell you this. Most SAP values (assuming you're looking at the NaOH numbers) run about 0.135 g NaOH / g of oil or more. Look for SAP values that are lower than that and you've found your answers. Shea, for example, is 0.130.

Unfortunately, a low SAP value says nothing about whether that particular fat will be your "superfat". A low SAP number is only telling you is that there are other non-fat chemicals in the fat that do not saponify. Those other chemicals might add nice things to your soap, but they don't have anything to do with the superfat issue.

The fats that remain when saponfication is complete will be determined by the ingredients in your specific recipe, the temperature at which the saponification occurs, and the kinetics of the competing reactions of the NaOH with the various types of fat molecules.