The paper investigates the phenomenon of ring-like deposits formed when solids disperse in a drying drop. The authors explain that this occurs due to an outward flow within the drop, driven by evaporation and the need to maintain a fixed boundary shape. They develop a theoretical framework to predict the flow velocity, the rate of ring growth, and the distribution of solute within the drop. The theory is based on the assumption that the contact line is pinned, leading to an outward flow to replenish liquid lost at the edge. The theory is validated through experiments using various solvents, substrates, and solutes, showing good agreement with the observed ring formation. However, some discrepancies suggest the presence of additional mechanisms, such as vertical mixing, viscous stresses, and Marangoni effects. The study highlights the potential for controlling deposition processes using this mechanism, particularly in applications like concentrating deposits into fine lines for electronic or information storage purposes.The paper investigates the phenomenon of ring-like deposits formed when solids disperse in a drying drop. The authors explain that this occurs due to an outward flow within the drop, driven by evaporation and the need to maintain a fixed boundary shape. They develop a theoretical framework to predict the flow velocity, the rate of ring growth, and the distribution of solute within the drop. The theory is based on the assumption that the contact line is pinned, leading to an outward flow to replenish liquid lost at the edge. The theory is validated through experiments using various solvents, substrates, and solutes, showing good agreement with the observed ring formation. However, some discrepancies suggest the presence of additional mechanisms, such as vertical mixing, viscous stresses, and Marangoni effects. The study highlights the potential for controlling deposition processes using this mechanism, particularly in applications like concentrating deposits into fine lines for electronic or information storage purposes.