Hair shape, is it straight, curly, or wavy?

Hairstraind thickness, how thick is an individual hair?
F - Fine hair strands, can barely see or feel them when rolled between fingers.
M - Medium hair strands, in between fine and coarse, are fairly easy to see and feel kind of like a regular sewing thread.
C - Coarse hair strands, easy to see even against backgrounds with the same color, feels stiff between fingers and when you roll it back and forth, you might actually hear it.

Hair volume, how thick is the volume of your hair?
To measure this you need to put all of your hair in a ponytail and measure its circumference.
i - thin, less than 5 cm / 2 inches
ii - average, between 5-10 cm / 2-4 inches
iii - thick, more than 10 cm / 4 inches

Combining these, you get your hair type like this: 3B/C/ii

Oily skin.
Dry skin.
Sensitive skin.
Combination skin.
Normal skin.

It's a schampoo used to remove buildups from your hair, it can be used for a while before you start to use low-/no-poo hair producs or on occations to do a cleansing.
This schampoo needs to contain sulfates to cleans but it can't contain silicons, mineral olies or other products that will build up on your hair.