how does the vatican make white smoke

They use a specially prepared chemical “smoke bomb” mix burned in a stove, not just ordinary paper or straw.

Quick Scoop

When a pope is elected, cardinals burn the paper ballots in a dedicated stove inside the Sistine Chapel, then ignite a separate chemical charge designed to give off white smoke. That smoke travels up the famous little chimney so people in St. Peter’s Square (and cameras worldwide) can see the signal: Habemus Papam – “We have a pope.”

How the white smoke is made (modern method)

Since 2005, the Vatican has relied on a precise pyrotechnic recipe so the color is unmistakable.

Most recent disclosed “white smoke” mix includes:

• Potassium chlorate (the oxidizer – provides oxygen for burning).
• Lactose (milk sugar – fuel that makes lots of particles).
• Pine resin/rosin from conifer trees (another fuel that makes light-colored droplets and ash).

These ingredients are packed into cartridges and burned in a second stove alongside the ballots. The reaction doesn’t burn completely, so instead of invisible gases you get a dense cloud of tiny water droplets and light-colored particles – essentially a man‑made fog that looks bright white as it billows out of the chimney.

What about the black smoke?

To say “no pope yet,” they burn a different mix to make thick black smoke.

A typical formula uses:

• Potassium perchlorate (oxidizer).
• Anthracene (a coal‑tar hydrocarbon that makes lots of black soot).
• Sulfur (helps control the burn and adds more particles).

This cocktail produces big, dark soot particles that strongly absorb light, so the plume looks clearly black even from far away.

Why they changed the recipe

In older conclaves they tried simple tricks like:

• Wet straw for white-ish smoke.
• Tar or pitch for black smoke.

But the results were often gray and hard to interpret, causing confusion in the square and on TV. Modern chemistry solved that: the Vatican adopted the current formulas and added electric heaters and fans in the flue so the smoke comes out strong, thick, and clearly either black or white.

In short: the Vatican makes white smoke by burning ballots plus a controlled pyrotechnic mixture (potassium chlorate, lactose, and pine resin) in a special stove, creating a dense white cloud that signals a new pope has been chosen.

Information gathered from public forums or data available on the internet and portrayed here.