Thanks Jacqui - it was the pH I was worried about - but of course I didn't even think of the fact that it is liquid! I am making a cocamidopropyl betaine free bar though.I wouldn't use that much decyl glucoside because the pH of this surfactant is quite high and you don't really want to have to try and adjust the pH. I would also suggest limiting the liquid surfactants to a maximum of around 25% so that your bar is not too soft.
I would advise using at least 10 to 15% of cocamidopropyl betaine as part of the liquid surfactant amount to help melt the SCI.
Hope this helps
Thanks for your response Jacqui - I've actually just made them and now they're in the mold, so I will give an in depth report on performance in a few days. Not too sure of the smell - Litsea, Rosemary and Patchouli - smells a bit weird. Ah well - can always give them as Xmas pressies to get rid, lol!You could possibly use another amphoteric surfactant such as sodium lauroamphoacetate instead of the cocamidopropyl betaine. Amphoteric surfactants help to improve mildness so they are always a great addition.
I use the SCI in powder form as I think it gives a more consistent appearance and melt/blend it with the cocamidopropyl betaine as a first step. I haven't tried with the granules so can't advise too much there but I think you would probably get better performance with a powder form melted/blended into a homogeneous mix.
I have seen a few formulas that have 40% SCI and I remember reading somewhere that people used SCI as the only solid surfactant so I don't think this would be an issue.
You could possibly use another amphoteric surfactant such as sodium lauroamphoacetate instead of the cocamidopropyl betaine. Amphoteric surfactants help to improve mildness so they are always a great addition.
Ive done a search for
SODIUM LAUROAMPHOACETATE and I can't find a supplier in NZ
Thanks Jacqui - I will look them up : )I only know of TRULUX in Australia that sells sodium lauroamphoacetate. They do ship internationally but I have no idea of what the shipping fees would be to NZ.
You could also look for other amphoterics such as cocamidopropyl hydroxysultaine, sodium cocoamphoacetate or disodium cocoamphodiacetate.