The influence of the surface tension difference on the floatation of the paint in the ordinary color mixing, it is often found that some color paste in the white base paint is difficult to disperse evenly, soon there is color separation or floating phenomenon, or paint can not open the effect. In the process of making paint, the making of white paste is different from that of color paste, which is usually made with anionic dispersant or ionic polyelectrolyte dispersant, while color paste is usually made with nonionic dispersant, white pigment and color pigment particles have different surface properties because of adsorbing a different wetting dispersant, and their hydrophilic and hydrophilic values are different, the surface tension is also different. In general, ionic Surfactant have higher surface tension than non-ionic Surfactant. They are all non-ionic Surfactant, and their surface tension is different because of their different hydrophobic end structure. Moreover, the outermost link in the hydrophobic end structure contributes the most to the surface tension. A molecule with low surface energy means that the forces between molecules are small and the surface tension is low. From the view of thermodynamics, the substance with low surface tension is easy to adsorb and transfer to the interface, which makes the system stable, the additional pressure difference of the curved liquid surface is reduced, so it is beneficial to the stability of the liquid surface and the dispersion system. Therefore, if the surface tension between the white paste or color paste and the system surface tension difference, with this paste configuration of paint is more likely to float
