The reversibility of asphaltene adsorption has been a subject of debate in the literature. Indirect observations that are used to support the argument in favor of irreversibility of adsorption include formation of wrinkles on the surface of water droplets aged in asphaltene solution upon compression similar to other irreversibly adsorbed particles , caused by layer collapse when the saturation surface coverage is reached with decrease in interfacial area. Some investigations of wrinkling and water/crude oil emulsion stability suggest that factors other than irreversible adsorption can cause the layer collapse . Moreover, observations from contraction experiments of droplet aged with asphaltenes left at rest indicate relaxation towards higher interfacial tensions till similar values to those before the compression are approached and the wrinkles formed on contraction also disappear after some time suggesting the partial desorption of asphaltenes from the interface .