This lab report describes an experiment using paper chromatography to separate and identify the components in a mixture of inks. The student spotted samples of blue ink, black ink, and a mixture on a chromatography paper strip and developed it in a solution of 60% ethanol and 40% water. This caused the different components to travel different distances up the paper based on how strongly they were absorbed by the stationary paper versus the mobile solvent. The student then calculated retardation factors to quantify the separation and identified the individual inks. Paper chromatography is commonly used to analyze mixtures and study processes like DNA sequencing, food testing, and drug detection.