Projected to grow at a rate of 6.2% from 2017 to 2022, the global dry shampoo market
is expected to reach an estimated value of $4.1 billion by the end of 2022...
July 2019 SPRAY 33
differences. Advancing the typical RGB (Red/Green/Blue) values
obtained through optical imaging, hyperspectral imaging combines
photography with spectroscopy, obtaining the entire visible spectrum
per pixel and allowing for improved depth of perception and
analysis. Focusing on the background, color and shine, overall hair
condition was evaluated for an Advantage Revive formula versus
a commercial Dry Shampoo (Figure 4). Performance effectiveness
was measured as a function of these measurements, representing
the level of cleaning, impact on hair vibrancy and shine and the
impact on perception of hair color. Images were
acquired of the mannequin in the clean, natural
state. Sebum was applied to the root and worked
through the fiber assembly, and test products
were applied, worked through and combed. Images
were acquired, and the shine, background
and color were measured. As demonstrated
(Figure 5), Advantage Revive polymer restored
the hair to its clean state, as the control muted
the color, shine and overall appearance.
Traditional starch-based formulations can have
spray drift during application due to the particulate
particle size, high use level and surface modification.
This spray drift can cause product to
be observed on clothing and bathroom surfaces.
Advantage Revive polymer’s optimized particle
size, lower use level and hair affinity due to its
pseudo-cationic behavior (Figure 6) helps reduce
spray drift and allow for a more efficacious and
sustainable application (Figure 7).
The recommended use level of Advantage Revive
polymer is 2–6%; employ ≤ 0.5x starch use level for replacing/
evaluating against existing starch-based formulations. A minimum
1:4 polymer/solvent ratio is required for optimum dispersion;
higher ratios of solvent are preferred. For applications where
residue is perceived as a signal of cleaning, compatibility with existing
starch offerings allows for reduction of use level and improved
efficacy. Robust solvent and propellant compatibility enable the
formulation of anhydrous and water-containing formulations.
Glycols/polyols improve the performance with respect to overall
hair condition and reduction of perceived residue; the incorporation
of water enables further reduction of use level and the ability
to create ethanol-free sprays.
Accelerated studies have demonstrated
no observable clogging with long-term
studies in progress. Packaging screening
has discerned no incompatibility with
lined aluminum and unlined tinplated
steel; inhibitors are required where waterbased
systems are employed in unlined
tinplated steel.
Game Changer
Dry shampoos have been a game changer
in the hair cleansing space. They allow
consumers to skip the arduous process
of washing, conditioning and styling hair
on a daily basis and provide a solution
to simplify their lives. Hair care consumers
are not shy in voicing their opinions
of what works and what does not. Many
online reviews capture their sentiments of
numerous formulas on the market, calling
out the lackluster results achieved from
some dry shampoo formulas, especially
with respect to poor cleaning, visible resi-
Figure 3: Advantage Revive polymer (right half - tress and mannequin),
commercial starch-based control (left half - tress and mannequin).
Figure 4: Areas of measurement.