Rosemary Oleoresin

[SoapDaddy70]

I am dying to make my first batch of soap. As of tonight I will have everything I need in terms of equipment and oils and lye and all that good stuff. Unfortunately an order i placed that included Rosemary Oleoresin might not come till next week. Since this will be my first batch should I just skip the Rosemary Oleoresin and get my first batch under my belt?

 

[Misschief]

Could I ask why you want the Rosemary Oleoresin? I've been making soap for over 5 years and have never used it in any of my soaps with no issues.

 

[SoapDaddy70]

Could I ask why you want the Rosemary Oleoresin? I've been making soap for over 5 years and have never used it in any of my soaps with no issues.

Only because I am easily influenced and a newbie and read that it will extend the shelf life of the soap.

 

[GemstonePony]

Do you have a Chelator (citric acid, sodium citrate, sodium glutamate, EDTA, and I think I'm forgetting one)? I feel like those are more important.
ROE can help if your recipe is high in Oleic or Linoleic acid and your superfat is high, but if you're under 38% Oleic and under 14% Linoleic and your superfat is 5% or under, I would just go with the first batch.
I have it, but I don't bother with it unless I'm experimenting with a recipe that's high-risk for DOS.
It might also hedge your bets on longevity if you were selling, but that absolutely shouldn't be a consideration for your first year or two anyways.

 

[SoapDaddy70]

Do you have a Chelator (citric acid, sodium citrate, sodium glutamate, EDTA, and I think I'm forgetting one)? I feel like those are more important.
ROE can help if your recipe is high in Oleic or Linoleic acid and your superfat is high, but if you're under 38% Oleic and under 14% Linoleic and your superfat is 5% or under, I would just go with the first batch.
I have it, but I don't bother with it unless I'm experimenting with a recipe that's high-risk for DOS.
It might also hedge your bets on longevity if you were selling, but that absolutely shouldn't be a consideration for your first year or two anyways.

According to soap calc numbers Oleic is 60 and Linoleic is 10. I am probably over complicating my first batch so I probably wont wait for it and just get my first batch under my belt. Just in case anyone was wondering here is the oils in the recipe.

Olive Oil 75% - 595g
Shea Butter 16% - 127g
Castor Oil - 9% - 71g
with a 5% superfat

 

[earlene]

I use ROE in oils to help ward off rancidity of the oils. In conjunction with EDTA (ethylene-diamine-tetra-acetic acid) to ward off DOS. PLUS the EDTA helps reduce soap scum. The combo works very well for me.

Here is a good article on what ROE (Rosemary Olesresin Extract) is and why it is often used in and by soapmakers:
https://classicbells.com/soap/ROE.asp
Here is a good reference that is written by Dr Kevin Dunn (chemistry professor & author of Scientific Soapmaking) that documents scientific results of different additives used in soap for the purpose of warding off DOS:
http://cavemanchemistry.com/DreadedOrangeSpot-Dunn.pdf
As many other soapers have reported doing, I add it to each container of liquid oil when I open it (and write the date the ROE was added onto the container so I know for sure it was done.) I also sometimes add it to hard oils after melting to use in soap, paricularly if the formula doesn't contain a lot of soft oils.

And another good article on EDTA (just as an FYI):
https://classicbells.com/soap/EDTA.asp

 

[shunt2011]

I add ROE to my liquid oils when I open them. I don't add it to my soap specifically.

 

[SoapDaddy70]

I use ROE in oils to help ward off rancidity of the oils. In conjunction with EDTA (ethylene-diamine-tetra-acetic acid) to ward off DOS. PLUS the EDTA helps reduce soap scum. The combo works very well for me.

Here is a good article on what ROE (Rosemary Olesresin Extract) is and why it is often used in and by soapmakers:
https://classicbells.com/soap/ROE.asp
Here is a good reference that is written by Dr Kevin Dunn (chemistry professor & author of Scientific Soapmaking) that documents scientific results of different additives used in soap for the purpose of warding off DOS:
http://cavemanchemistry.com/DreadedOrangeSpot-Dunn.pdf
As many other soapers have reported doing, I add it to each container of liquid oil when I open it (and write the date the ROE was added onto the container so I know for sure it was done.) I also sometimes add it to hard oils after melting to use in soap, paricularly if the formula doesn't contain a lot of soft oils.

And another good article on EDTA (just as an FYI):
https://classicbells.com/soap/EDTA.asp

Thank you so much. Read the Kevin Dunn PDF. Very interesting stuff. I have not even made my first batch of soap and I am freaking obsessed already!

 

[DeeAnna]

I do the same as Shari (shunt) and Earlene -- ROE in the fats for storage if they're not otherwise preserved. I add a chelator to the soap itself.