Comparative Hair Oiling Evaluation

One sample
from each of the different types of hair samples was taken and set
aside as the reference hair sample. One of them was set aside for
shampoo application only. Safflower seed oil was applied to one, rosehip
oil to one, and grapeseed oil to one of the remaining three hair samples
from each hair type. Oils (0.5 mL) were applied to the hair with the
help of a pipette. The oils were left on the hair for 12 h. While
determining the optimum ratio for the oil applied to the hair, trials
were carried out in the range of 0.1–1.0 mL. As a result of
the tests and analyses such as color, stretching, elongation, morphological
appearance, etc., no change was observed in the properties of the
hair samples after a certain value. For this reason, all test and
analysis results were compared in detail, and the optimum amount to
be applied to the hair was determined as 0.5 mL. This rate corresponded
to a rate of 1.5% (v/w) over the determined amount of hair. In practice,
the minimum time for all applications to the hair was 12 h. In addition,
because of the preliminary trials performed between 6 and 24 h, there
was no significant change in the analysis and test results after 12
h. Therefore, the optimum time was determined as 12 h. After 12 h,
the hair was washed with a base shampoo and oiled again. This washing,
drying, and oiling process was repeated 10 times. After the 10th lubrication,
the hair was washed again with a base shampoo, dried, and ready for
tests. Some images taken while applying oil to hair samples are given
in Figure 4. In this
experiment, safflower seed oil, grape seed oil, and rosehip oil were
used comparatively.