A formulator learns that "viscosity" is rarely constant. Tadros categorizes flow behavior:
A significant portion of the text is dedicated to —how surfactants orient themselves at the interface. Tadros demystifies the Hydrophilic-Lipophilic Balance (HLB) system, moving beyond the simple "HLB number" to discuss the limitations of the concept in modern mixed-surfactant systems. Formulation Science and Technology- Volume 1 Ba...
Volume 1 begins with an unavoidable truth: most formulated products are heterogeneous systems. Whether a solid suspended in a liquid (suspension), a liquid dispersed in another liquid (emulsion), or a gas in a liquid (foam), the interface between phases is the site of instability. Tadros meticulously explains that the high surface free energy at these interfaces drives the system toward coalescence, flocculation, or creaming. A formulator learns that "viscosity" is rarely constant