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.
Combine with water to make fog-like gas. One of the most common uses of dry ice is to create artificial smoke or fog. This is as simple as mixing dry ice and water â splashing a bit of water onto the ice creates a hissing noise and produces lots of carbon dioxide gas.