Patchouli and 5x orange are 5% in bar soap, but I have never seen or used a 15x so you will need to verify that with the vendor, as they should have the IFRA cert on file. As for the ylang ylang I will need to look that one up after I get home and post it to you then.
Blends get a little tricky since you do not want to use the full amounts on each scent. So I usually begin by making a "master batch" blend. I will start with the predominant scent at full max rate and add all the others proportionately. Since you certainly do not want too high of a % scent, no matter if each individual item is below its own max rate, this master batch will allow you to then use the appropriate amount. Once it is made, mix well, then add into your batter from it. This takes doing the math first, to verify your final amount won't be too much of any one ingredient, but using .8 oz ppo from the master blend is quite a bit easier than doing it all individually while trying to maintain the correct proportions. Plus, then you will have more already made that you can use to make lotion or scent bath bombs or whatever.
_________________ Remember, it's not just that we weather the storm, but how we dance in the rain.
Tammy
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