All modern plastic films have long-chain molecules. Stretching aligns them in the plane of the film, making the film stronger and highly impermeable to small molecules. Daedalus now wants a film with molecules oriented perpendicular to its plane. Langmuir–Blodgett films are like this, but they are normally too thin for the purposes Daedalus has in mind.

Langmuir–Blodgett films are made from a substance whose long-chain molecules float on a solvent such as water; their chains are vertical and nearly touch. When a substrate is passed through the water's surface, the film is transferred to the substrate. Many such passes build up a Langmuir–Blodgett film of numerous perpendicular layers. To make the films thicker, DREADCO chemists will lay them on a flexible substrate, perhaps paper or non-woven porous film. Many passes through a polymer solution will then be needed to build a thick Langmuir–Blodgett film. The frail product will be retained on the substrate, although it may be stripped off if it is strong enough. Its molecules will run across the film.

Unlike normal films, DREADCO's 'Langblofilm' will have little strength and will be highly permeable. With its molecular chains side-by-side across its whole width, it is in effect riddled with long, narrow, intermolecular holes lying between the chains. Small molecules will percolate through them. Daedalus recalls that in electro-osmosis a liquid is impelled along a narrow capillary by a voltage across its ends. This works best for capillaries of small radius, and for fluids of high permittivity. Water has a very high permittivity, so Langblofilm is an ideal pump for water.

One obvious use is air conditioning. Daedalus will evaporate a thin layer of aluminium on the film faces, and will lay it as a wallpaper on a porous wall. An electro-osmotic voltage applied across the faces will then suck water out of the air and into the film. At the other face it will be desorbed, and will diffuse through the porous wall to the outside. In this way the whole area of wall will dehumidify the room. Traditional air-conditioning systems, with their complex machines and pipework, will be totally outclassed. To suit popular taste, the DREADCO team may have to print floral patterns on their product, overlaying the aluminium electrode layer. This itself must be thin enough not to block the holes of the film, but weak electrostatics over a wide area will then take over from air-conditioning motors pumping on a tiny cross-section.