Tired of students guessing why some pigments race up the paper while others barely move? Picture your class confidently measuring solvent fronts, calculating Rf values, and building evidence-based explanations — all from one easy-to-follow lab handout. You know the drill: some students rush through labs, others get lost measuring or writing conclusions, and you spend hours correcting sloppy data. This Chromatography Lab: Unmasking Green Pigments solves that problem with a focused, teacher-test