Obviously an air conditioning system will remove it much faster. Haze may disperse quite quickly, depending on the venue, humidity, air movement, and number of people present. Many effects lights rely on the presence of haze to show up the beam, as the actual points of the stage which are illuminated by the light are not relevant – only how the beam looks travelling through the air. Haze is designed to hang in the atmosphere, and to enable light beams to be visible. Parcan beam through haze at the Northcott Theatre, Exeter for ‘Seneca’s Oedipus’ (lighting design by Jon Primrose) 2. Video: Le Maitre Peasouper Dry Ice Machine This is usually achieved by a Pea-Souper device (see video below), named after the London fogs in Victorian times. The dry ice effect is created on stage by immersing pellets or blocks of dry ice into boiling water. If there’s more than 5% carbon dioxide in the air it can be toxic – suffocation will result if there’s an actor or technician in that environment. This removes the wastage due to storage losses.Īs carbon dioxide is heavier than air, you must take care that any area lower than the dry ice machine cannot fill with carbon dioxide which Long-running shows or those that require a large amount of dry ice often use Carbon Dioxide gas bottles to produce their own dry ice on site, on demand. The box should be packed with newspaper to help the dry ice keep itself cold. The best way to store dry ice is in a polystyrene box with a loose fitting lid. As the dry ice sublimes, gas is produced which will cause a build-up of pressure, eventually resulting in an explosion. Also, dry ice should not be stored in an air tight container. The surface temperature of a block of dry ice is much lower than the freezer can maintain (minus 109.3 degrees Fahrenheit or minus 78.5 degrees Centigrade), and damage to the freezer may result. It goes without saying that dry ice must not enter your mouth!ĭo not store dry ice in a freezer. Skin damage will occur if you touch dry ice directly. A block will last longer, but won’t be as spectacular.ĭue to it’s extreme cold, dry ice must only be handled wearing thick non-woollen gloves. Pellets have a larger surface area, so produce a larger effect. These independent reports demonstrate that Concept are producing the safest artificial fog available.Dry ice is frozen solid carbon dioxide which when placed into hot water sublimes into a gas and forms a thick white cold vapour which hangs low to the ground.ĭry ice is available in two main varieties – pellets and blocks. Concept have available on requested a comprehensive MSDS which includes multiple independent reports from analytical laboratories, government authorities and research organisations. Alternatively pyrotechnics fog bombs can be used but these are often considered to be toxic, messy and hazardous from a shipping perspective.Ī. The most effective way to create coloured fog is to use coloured lights. 2 micron mmd which (assuming unit density) settles at a rate of 18.5”/ hour whereas a 0.2 micron mmd particle (created by the ViCount, Vulcan, Spirit 900, Colt 4) on se□les 0.315”/hour.Ī. Also the chances of deposition occurring are dramatically reduced, for example most entertainment fog machines will create a particle size of approx. Smaller fog particles will mean that your chemical usage is reduced (and therefore your running costs). Is a smaller smoke / fog particle size important?Ī. It is diffraction / refraction of light through the particles that creates the effect. The fog produced by all of Concept’s fog generators is in basic form fog or an aerosol, consisting of millions of tiny liquid spheres. We manufacture specialist smoke systems for professional smoke detector testing.Ī. Artificial smoke can still trigger smoke detectors, if the smoke is dense enough. Will a fog machine set off my smoke alarm?Ī. In either case the fog effect will be poor and will void any manufacturer’s warranty. If you over heat the fog fluid you can create a potentially toxic fog. If fog fluid is under heated you are likely to create a wet fog, leaving a residue etc. If the wrong fluid is put through a fog machine it has the potential to either under heat the fog fluid or over heat the fluid. All fog machines having a heating element which is designed to operate at a specific temperature.Īll fog fluids have different characteristics (long lasting or quickly dispersing) and to get these characteristics different mixtures of fog chemicals are used.Įvery mixture will have its own specific vaporising temperature. Is there any difference between a smoke machine and a fog machine?Ī. When the vapour leaves the fog machine heat exchanger and mixes with the cooler atmospheric environment, it cools rapidly, expands / condenses to produce the fog effect. This element will heat the fog fluid above its boiling point and transform it into vapour. The fog fluid is based through a heating element inside the fog machine.
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