Subtitles section Play video Print subtitles Our topic for today is Chromatography. Please take my cup. Please get me the schedule. Does black ink consist of only black color or any other color as well? Let us find out by the process of paper chromatography. Chromatography is a technique of separating two or more dissolved solids which are present in a solution in very small quantities. Wake up. Please come here. Yes. Please wake him up. Do something. Wake him up. Take a strip of filter paper. Draw a line with a pencil close to the lower edge of the paper. No response. Please call the dropper. Please wake him up. Put a small drop of ink on the center of the line. Let it dry for sometime. No response. Call Mr. Smart. Please wake him up. Take a jar containing some water. Put the filter paper in it such that the drop of ink is just above the water level. No Response. After sometime, the water starts gradually rising up by capillary action. As the water moves up, it takes the dyes present in the ink along with it. As the water rises up, we see different colors on paper. These are the different dyes present in the ink. Different dyes have different solubility levels and travel at different speeds as the water rises up. As a result, we see different colored strips at different heights and the dyes get separated. Hence, paper chromatography is used to separate the different colors in a dye.