Do your results suggest that the chemical characteristics of these pigments might differ according to their color? Explain. What did you observe when you placed your TLC plate under the UV light? What is a possible explanation for what you observed? Which of your pigment molecules was the most nonpolar? polar? Would the separation of the pigments be greater or lesser if a more polar coating was used on the film? Explain why. Why should you not use ink on the coating to mark your pigment placement?