Foaming z Dispersions of gas bubbles in a continuous liquid or semisolid phase that contains a soluble surfactant z Factors affecting foam formation and stability – Solubility (good foaming capacity and stability) – Surface viscosity (stabilizing, insoluble particles) – pI (improves stability, intramolecular attractions increase thickness and rigidity of film) – Good foam performances at extreme pH z Increase viscosityFoaming z Dispersions of gas bubbles in a continuous liquid or semisolid phase that contains a soluble surfactant z Factors affecting foam formation and stability – Solubility (good foaming capacity and stability) – Surface viscosity (stabilizing, insoluble particles) – pI (improves stability, intramolecular attractions increase thickness and rigidity of film) – Good foam performances at extreme pH z Increase viscosity