where can you find ROE and EDTA,

[Kaolin washer]

I have the book scientific soap making, and they guy mentioned that DOS is caused by oxidation of metals and that preservatives such as ROE and EDTA can greatly reduce this plague in your soap . but i cant seem to find who sells them

 

[earlene]

The best quality ROE for the best price I have found is here: Rosemary Oleoresin (ROE)1 lb - $68.75

EDTA is available as well (You want the Tetrasodium EDTA, btw): Tetrasodium EDTA1 oz - $3.95

 

[glendam]

I have gotten the ROE from New Direction aromatics, and the EDTA from lotion crafter’s or Makeyourown.

 

[LynetteO]

I got my ROE from Wholesale Supplies Plus. $7 for .5oz
https://www.wholesalesuppliesplus.com/products/rosemary-oleoresin-extract-roe.aspx

 

[Kaolin washer]

thank you all , now how much do you use in a pound of soap ?

 

[Kaolin washer]

both effective and economical. Typically, 0.2 - 0.5 grams will be added to 1000 grams of oil.

 

[LynetteO]

thank you all , now how much do you use in a pound of soap ?

Found this at WSP Q&A about their product.

 

[earlene]

Re: ROE usage in soap:

"0.2 to 1.0 g ROE per 1000 g fat (0.02% to 0.1% based on total fat weight) "

https://classicbells.com/soap/ROE.asp

And more detail about research on using ROE in combination with chelators to prevent DOS:

DreadedOrangeSpot-Dunn.pdf (cavemanchemistry.com)

If the above won't open for you (some browsers won't), then here it is at the HCSG site.

https://www.soapguild.org/how-to/make-soap/dreaded-orange-spot.php
Before I knew anything about DeeAnna's site with her fantastic compilation of soapy information, Dr. Dunn's paper was a constant reference point for me for DOS prevention.