In color theory, a purple is defined as any non-spectral color between violet and red (excluding violet and red themselves). The spectral colors violet and indigo are not purples according to color theory but they are purples according to common English usage since they are between red and blue.
Dry ice fog is a thick, dense, low-lying fog created exactly the way fog in nature is. created, by condensing water vapor out of the atmosphere. We use dry ice (the. solid form of carbon dioxide) to condense the water vapor out of the air. Dry ice. fog contains no chemicals, glycols, or oils, and is truly a water based fog.
Answer: Dry ice is the general term for solid carbon dioxide (CO), coined in 1925 by Long Island-based Prest Air Devices. Though originally a trademarked term, dry ice has become the most common way of referring to carbon dioxide in its solid, or frozen, state.