Adding volume to limp hair, especially those with historically delicate
follicles, can be easier than you think. Some common techniques will
work in most cases, giving not only the desired thickness, but also
adding bounce, body, and shine. The style and the length of the hair
can always be a little bit thicker, or at least to appear voluminous,
even if the reality is not what it seems.
Start with the cut, keeping the length ranging from the shoulder to the chin. Shorter hair will make your mane appear depleted, and longer hair can awkwardly emphasize that lean and hungry look. By establishing maximum body, this will make your hair appear thicker, and it doesn't hurt for a style that includes layering. The next step is to consider varying the color. If you opt for a less permanent treatment; for example, demi-permanent, these treatments will coat the surface of the strands, adding a thickening to the surface, which will ultimately thicken the hair. Of course, there is always a permanent color, containing ammonia, which roughens the cuticles, causing an effective swelling. You will feel as if you have more hair. The final composition effect is to take advantage of optics. Add colored streaks (just a brief shade of variation, nothing gothic, only a shade or two off your natural shade). This will create the illusion of depth, dimension and texture, which ultimately generates the overall appearance of greater volume.