Theatrical smoke can be made from water vapor, which is safe. It can also be made with liquid nitrogen or carbon dioxide (from dry ice). In both these cases, the fog is made when water vapor in air condenses.
How do you make theater smoke?
A machine heats water to at or near the boiling point, creating steam and increasing the humidity in a closed container. When liquid nitrogen is pumped into the container, the moisture rapidly condenses, creating a thick white fog.
What is the smoke used at concerts?
However, concert “smoke” effects created using liquid carbon dioxide (CO2) can pose severe hazards to the public and venue staff if used in improperly ventilated areas.
Is theatrical fog safe?
Study results revealed no evidence of serious health effects associated with exposure to theatrical fog and haze. Peak exposures to elevated localized air concentrations are associated with increased reporting of respiratory, throat and nasal symptoms, and findings of vocal cord inflammation.
What is in dry ice?
Dry ice has just one ingredient: carbon dioxide. Technicians create dry ice by pumping liquid carbon dioxide into holding tanks, which reduces the temperature to -109° F and pressurizes the substance into solid blocks or pellets.
Why do they use smoke at concerts?
Top of the range hazers create high-quality haze which hangs in the air for a long time and adds drama to lighting effects on stage. It’s up to you whether you hire or purchase the machine of your choice, but they will liven up any event and add a touch of theatre.
Are fog machines bad for your lungs?
This study also found long-term exposure to smoke and fog was associated with both short-term and long-term respiratory problems such as chest tightness and wheezing. Personnel working closest to the fog machines had reduced lung function results.
Is it safe to breathe in fog?
Sawai Man Singh (SMS) hospital former superintendent and allergy and pulmonary medicine specialist Dr Virendra Singh said, “For a healthy person, it may not be harmful but for a person suffering from asthma and other respiratory diseases including chronic obstructive pulmonary diseases (COPD), it is quite risky to walk …
Do theatres use smoke control for proscenium opening protection?
Eleven years later, several theatres are now coming online using smoke control for proscenium opening protection. Smoke control also remains as an alternative to stage house roof vents as indicated in IBC 2018, 410.2.7. Roof ducts for Smoke Control, McKnight Center for the Performing Arts, Stillwater, OK.
What are the requirements for smokesmoke egress systems?
Smoke must remain at least six feet above the highest level of egress for a minimum of 20 minutes, the system must be engineered in accordance with generally accepted and established engineering principals, and the system must be documented with information and analysis that demonstrates compliance.
When was nitrogen smoke first used on a stage?
It was during Hall’s rendition of “Ill Wind” that nitrogen smoke was used to cover the floor of the stage. It was the first time such an effect had ever been used on a stage and caused a sensation.
What are some popular applications of theatre fog?
Common popular applications for theatrical fog include environmental testing (such as HVAC inspections) as well as emergency personnel and disaster response training exercises.
