Determine your hair properties
We've simplified the process of determining your hair properties. The fact is that your hair is made up of proteins, so every hair needs protein to a greater or lesser extent. It's up to you to find a good balance between protein and moisture. Observe, feel, and experience what certain routines/products do to your curls. Unfortunately, it doesn't work the same for everyone; if only it did, we'd be done in no time. This is truly a personal process, and as time goes on, you will increasingly experience and understand what your curls need.
Hearth density
This refers to the thickness of a single strand of hair. You can have fine, medium (normal), or coarse hair. You can test this by holding a single strand of hair up to the light. If you can barely see the hair, you have fine hair. If the hair is clearly visible, you have coarse hair. If it's in between, you have medium hair.
You can also test it by holding a single strand of hair between your fingers and observing what you feel. If you feel almost nothing, you have fine hair. If you clearly feel the hair, you have coarse hair. If it's in between, you logically have medium hair.
A third method is to compare a single strand of hair with sewing thread. Fine hair is thinner than thread, medium hair is roughly the same thickness as thread, and coarse hair is thicker than thread.
Fine
People with fine hair do not have to have thin hair (in terms of density). Their hair can therefore still look very full. Fine hair is fragile and that is why it is often difficult to grow your hair long. You should therefore be extra careful with fine hair. Fine hair can become greasy more quickly and it often cannot handle heavy products very well.
Medium/normal
This hair structure is somewhere between fine and coarse hair.
Course
Coarse hairs are generally strong hairs. Coarse hair usually needs good hydration and usually less need for protein.
Porosity
Porosity is the term used in hair care science to describe how well your hair can absorb and retain moisture. Porosity is influenced by the outermost layer of the hair (cuticle). This layer consists of scales. How porous your hair is is genetically determined, but it can also be influenced by external factors such as harmful ingredients in hair products, the heat from a straightener or hairdryer, or chemical treatments like dyeing your hair.
It is important to know your hair's porosity because it indicates, for example, whether you can use products with or without protein for your hair. You can have high, normal, or low porosity.
Determine porosity
You can determine your hair's porosity by careful observation and performing a few simple tests. For the Slip & Slide test, run your fingers down a strand of hair from tip to scalp. Does it feel smooth with no bumps? Then your hair likely has low porosity. If you feel a few bumps, it's medium porous, and many bumps indicate highly porous hair. These bumps are the open hair cuticles.
Another method is the drying time test: let your hair air dry and observe how long it takes. Highly porous hair dries in 2–4 hours, medium porous in 4–6 hours, and low porous hair takes more than 8 hours. Keep in mind that drying time also depends on your hair's thickness, the products used, and humidity.
However, porosity can vary, even per individual hair strand, and these tests only provide an indication. If the result isn't entirely clear, start with lighter products and discover what best cares for your hair.
Curl types
Using this image and a strand of your own hair, determine your curl type. This is not strictly necessary for ordering the right products but helps in the process of better understanding and categorizing your curls.
Discover your curl type
Curl type 2a
Slightly wavy and little volume
Curl type 2b
Wavy and distinct S-shapes
Curl type 2c
Smaller, more defined S-shapes
Curl type 3a
Slightly wavy and little volume
Curl type 3b
Wavy and distinct S-shapes
Curl type 3c
Smaller, more defined S-shapes
Curl type 4a
Slightly wavy and low volume
Curl type 4b
Wavy and distinct S-shapes
Curl type 4c
Smaller, more defined S-shapes