There has been recent discussion about various application methods and their respective volumes, so I
thought I would start a thread to have it all in one place.
Sprays
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We know (thanks to scientist) that
A4.2 gives .13 ml per spray. It would be better if we could have the figures for all of the spray products (Chikara,
Perception, TE, etc.), because the volume varies widely.
Spraying is more convenient for fragranced products which have a concentration
(mg/ml) suited to applying large volumes (i.e not NPA), and is normally associated with alcohol products. If you are
not confident about the suitability of the concentration or the fragrance, don't
spray.
Drops
A drop can either be from a pipette or
the dropper insert in a product. Normally estimated to be around .05 ml, drops actually vary greatly in volume
between products (or more specifically carrier agents) and droppers/pipettes. Again, it would be useful to know the
drop volumes for each product that the method applies to (this is quite easy to do, and you don't waste any
product).
Roll-on
inches
Brought into popularity by SOE, this one is harder
to measure. However, a previous forum member (Shoe) measured it quite accurately to be about 28 inches per ml, or
.36 ml. Most mixes heavy on di-propelene glycol (SOE, AE, PPA, etc.) can be approximated to be at that volume, but
alcohol or water based mixes will vary.
Dabs
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This one is fraught with controversy
There are several problems with quantifying a
dab, including; variations in method, carrier agent (alcohol, water, etc.), and also bottle size. The "accepted"
method is to cover the opening with a finger or thumb, invert the bottle to wet the chosen digit, and then applying
the liquid on the digit (after returning the bottle to a more sensible orientation, obviously ). Bottle size can
be measured by the size of the opening, so that one isn't really a problem, but volume of fluid yielded from each
dab will inevitably vary between carrier agent. However, from my rough measurements, the variation caused by these
factors is quite small, and I would estimate the average dab volume to be about 0.02 ml, give or take a few
thousandths of a ml.
To many this is the
application method of choice, as is allows application of a small amount of product with
precision.
To date, there quite a few products for which the default application method*
has been measured.
In
summary:
SOE
- inch, 0.036 ml
A4.2 - spray, 0.13
ml
.........
If anyone
has the volumes for any other products default method at hand, could they please post them here. Also, if you
disagree with anything said above, feel free to correct me!
*with TE I think knowing both the spray and dab volume is relevant to most
people.
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