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Blending Strength 
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Joined: Thu Jul 07, 2011 10:51 pm
Posts: 153
Post Re: Blending Strength
Hi - You can imagine it like this. There are 30 milliliters in 1 ounce, and typically this is the amount of carrier oil one uses - and can 'factor up from' (meaning if you're making 4oz total, just multiply the essential oil amounts by 4).

If you added 1ml of essential oil to 30ml of Carrier Oil, this would result in a 3.33% concentration of essential oil in the carrier. For simplicity's sake, we just say use 1/3rd ml of essential oil per ounce of carrier to make a 1% concentration. With our measuring pipettes, you can 'eyeball' this, and really 'close enough is close enough'.

You can of course also count drops. Every essential oil has a different number of drops per milliliter coming from a pipette or glass eye dropper. This varies from about 30 to 40 drops per ml depending on the EO. Rather than bog down on getting an exact number, use 12 drops of essential oil for each ounce of carrier oil to give you a 1% concentration.

So even if you use 3 essential oils, you could add 4 drops of each to one ounce of carrier oil, giving you a 1% concentration.

Sat Sep 07, 2013 11:23 am

Joined: Mon Feb 09, 2015 8:27 am
Posts: 2
Post Re: Blending Strength
I read your info chart on wintergreen essential oil and it says to "only used topically in dilutions of 25% or less to limit the transdermal absorption to safe levels." Isn't 25% rather high? That's a quarter of the blend.

Mon Aug 10, 2015 5:10 pm

Joined: Tue Nov 25, 2014 1:20 am
Posts: 5
Post Re: Blending Strength
Ok, I haven't seen this addressed: without having a recipe, how do I think about concentrations when using more than one oil? Suppose I had 2 oils that I knew I shouldn't use higher than, say, a 5% concentration for each. Also suppose that each oil has 40 drops per ml.

If I wanted a 5% concentration for each oil in 1 ounce of carrier oil and I used 60 drops (1.5 ml) for EACH oil (for a total of 120 drops / 3 mls) that would give me a 10% concentration of EOs per 1 ounce but a 5% concentration of each oil. Which is the correct way to think about this?

I guess what I'm worried about is the fact that a 10% concentration sounds too high even if each oil is within a safe range. As you can see, this becomes more critical when using many oils in a blend.

Thu Nov 12, 2015 10:48 pm

Joined: Mon May 27, 2013 4:12 pm
Posts: 107
Post Re: Blending Strength
In general, a blend should contain no more than 5 to 7% total essential oils. Less is better with these powerful healing agents.

For example, a well-researched blend for healing scar tissue contains 1% helichrysum in carrier oils.

Fri Nov 13, 2015 12:42 am
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