Answer:
Rf value or retention factor.
Step-by-step explanation:
TL C, is a separation techniques used for separating non volatile mixtures.
it is performed on sheet of glass,aluminum foil and plastic.
They are coated with adsorbent materiials e.g silica gel or Aluminuim oxide to form a staionary phase.
When the solvents and mixtures are applied the Rf values indicate the separation of the mixture