A liquid foam dispenser having a porous foamer element includes a liquid passage and a distributor for distributing the liquid across the outer surface of the foamer element during actuation, an air passage for transmitting pressurized air during actuation through the foamer element pores for generating a foam on or from the outer surface of the foamer element, and a separate vent passage permitting a rapid recovery of the container during depressurization.

A foam producing device for the alternative dispensing of foams or liquids comprising a porous element comprising a partially gas permeable wall, a gas distribution plenum, a gas entry port in fluid connection with said plenum; a second wall opposite the outer surface of said gas permeable wall; a mixing chamber comprising at one end, the proximal end, a small annular opening between said gas permeable and second wall, comprising an orifice for the uniform distribution of foamable liquid therethrough into said chamber and at the distal end an exit port for the discharge of foams or liquids from said chamber said chamber being tapered, or not, as required; a liquid distribution plenum for the uniform distribution of said foamable liquids to said orifice and a liquid entry port in fluid connection, through a conduit, with said plenum wherein said plenum and a source of foamable liquid are in fluid connection through a conduit therebetween; with the proviso that only the portion of said gas permeable wall between said orifice and said exit port is gas permeable said device further comprising, in the conduit between the pressurized gas source and said gas distributing plenum valve means to prevent entrance of said gas to said device when only the dispensing of liquid is desired.

There is described an aqueous, foamable composition delivered from a foaming device for conditioning, lightening and highlighting hair which comprises: (i) a conditioning agent, (ii) a peroxygen compound, (iii) an acid, and (iv) a foaming agent; said composition having a pH of 5 or less. There is also described a method for conditioning lightening and highlighting hair which comprises treating said hair with a composition of the invention.

A foam dispensing device mixes a foamable liquid with ambient air and dispenses a foam having a relatively constant ratio of liquid to air even during rapidly repeated foam dispension. The device contains a passage for foam return from a foam conduit to a liquid reservoir having one-way valve means to permit flow only in the direction from the foam conduit to the liquid reservoir during operation of the foamer, and a means of separating the inlet to the air passage from the outlet of the foam return passage to prevent flow of foam through the air passage during rapid, repeated foam dispension.

A foam dispensing device mixes a foamable liquid with compressed ambient air and dispenses a foam having the desired liquid-to-air ratio at an early time during foam dispension. The device, which has a vertical liquid conduit and a restricted air passage leading to a mixing chamber, also has two one-way pressure-activated valves to delay the flow of air and to accelerate the flow of liquid to the mixing chamber when the compressed air is introduced. The first valve is located in the liquid conduit below the air passage to prevent liquid from flowing down the tube, thereby accelerating the flow of liquid when the compressed air is introduced. The second valve is located above the air passage to delay air flow.