This volume contains the proceedings of the VIIIth annual meeting of the European Colloid and Interface Society (ECIS) which took place in Montpellier, France, in September 1994. The contributions cover a broad range of fields in modern colloid science, as well as their technical, experimental and theoretical aspects. Specific emphasis is given to: - Mixed systems: amphiphilic phases incorporating foreign particles - Concentrated suspensions and emulsions: structure and mechanical properties - Interactions and long-range order - Supramolecular structures under flow - Bio-colloidsColloidal stability of model polymer colloids with different functional groups.- Kinetics of crystal growth in charged colloidal suspensions.- Lateral capillary forces between colloidal particles incorporated in liquid films or lipid bilayers.- Colloid structural forces in thin liquid films.- Phase separation in aqueous magnetic colloidal solutions.- Fingering phenomena at bending instability of a magnetic fluid stripe.- Investigation of liquid crystalline phases using microscopy, differential scanning calorimetry and rheological techniques.- Phase diagram of dispersion of anisotropic particles.- Association between hydrophobic polyelectrolytes and nonionic surfactants. Phase behavior and rheology.- Interactions between hydrophobically modified polyelectrolyte and oppositely charged surfactant. Mixed micelle formation.- Surfactant-polymer interaction in thermo-induced gelling systems of ethyl (hydroxyethyl) cellulose (EHEC) studied by NMR self-diffusion, dynamic light scattering and rheology.- A comparison of several samples of modified hydroxyethyl cellulose and their interactions with surfactants.- Study of mixtures of hydrolyzed polyacrylamide-non-ionic surfactant in aqueous phase and in the kaoliin-water interfacial surface.- Effect of the addition of block copolymers on the formation and stability of vesicles (ll(