Editing Smoke screen (section)

===Dyes===
{{Main|Colored smoke}}
[[File:Smoke Signal 1.jpeg|thumb|Yellow smoke screens deployed to mark soldiers completing an objective during [[Exercise Northern Edge]] 2017]]
Various signalling purposes require the use of [[colored smoke]]. The smoke created is a fine mist of dye particles, generated by burning a mixture of one or more dyes with a low-temperature [[pyrotechnic composition]], usually based on [[potassium chlorate]] and [[lactose]] (also known as milk sugar).

Colored smoke screen is also possible by adding a colored dye into the fog oil mixture. Typical white smoke screen uses titanium dioxide (or other white pigment), but other colors are possible by replacing titanium dioxide with another pigment. When the hot fog oil condenses on contact with air, the pigment particles are suspended along with the oil vapor. Early smoke screen experiments attempted the use of colored pigment, but found that titanium dioxide was the most light scattering particle known and therefore best for use in obscuring troops and naval vessels. Colored smoke became primarily used for signaling rather than obscuring. In today's {{When|date=December 2019}} military, smoke grenades are found to be non-cancer causing, unlike the 1950s AN-M8 model.