Black paper was hypothesized to be the best insulation material, but the experiment found otherwise. The experiment tested how well different materials insulated beakers of hot and cold water over 15 minutes. For hot water, a wool sock proved the most effective insulator, maintaining water temperature best. For cold water, tin foil performed best by insulating temperature rise the most. In conclusion, the experiment disproved the initial hypothesis that black paper would work best, instead finding a wool sock and tin foil superior insulators.