Chapter 9 313 with the width of the specular reflection band and the nature of the micro-reflections within the band. 2. The chroma band is a secondary specular reflection band, which is most evident in lightly pigmented hair. It appears adjacent to the principle specular reflection band and is the result of internal reflections in hair. Are there better ways to isolate the chroma band from the principle specular reflection band? Can it be done experimentally? 3. What other types of optics can be utilized to better visualize the microreflections that constitute the specular reflection band? Are we observing achromatic aberrations due to our current optics? 4. Why do some treatments cause diffuse light to be less intense (e.g. darkening as a result of the wet effect)? Is this a form of internal reflection causing light to become trapped in the film resulting in greater probability of absorption? 5. How do different types of light affect hair luster? Sunlight is definitely different from fluorescent lighting found in most workplaces. And, both of these light sources are distinctly different than laser light! 6. Further investigation is required to determine if the entire specular reflection curve really is specular reflection. Are the end regions due to diffuse light? 7. Should we be gathering images with a higher dynamic range? The dynamic range of the human eye spans about 14 exposure values as compared to a standard photograph with film or a digital CCD, which covers approximately 8 exposure values. On the other hand, a high dynamic range image can capture more than 23 exposure values in a single image.36 In the last several years, imaging technology has evolved to capture images at several exposures, then to combine them with special software into one high dynamic range image. This type of analysis would