Leave the samples at room temperature exposed to the open air. Each day for several days, observe the surface and the thickness of the gelatin. Record the changes that you see. Compare the samples in terms of how well the lotion conserved the moisture in the gelatin. The following experiment could be done with real hair but since it may be difficult to come up with lots of long hairs for testing, we will substitute some wool cloth instead.
Nail polish includes the following ingredients.
Ground pigments give the polish its color. A solvent dissolves the nitrocellulose and allows you to spread the polish. A plasticizer keeps the film flexible. A suspending agent keeps the pigment spread throughout the polish. Record the differences in the samples.