Thanks for the demonstration I did thE TLC where i study The teacher told us to draw a line like you do but he told us to draw another line in solvent front hardly .
The TLC plates are impregnated with a fluorescent compound, causing them to glow green. The products that climb up the plate with the solvent block the UV light from reaching the plate, causing a dark spot! Sometimes, the compound you are testing on the TLC plate will glow own their own due to the uv light!
