How is Neon Color Made?

Neon color, often referred to as fluorescent color, is created through different methods depending on the application. In neon signs, the color is determined by the gas inside the tube.

The classic neon sign's color originates from the gas contained within the glass tube. While neon gas produces the well-known orange glow, other gases create diverse colors:

• Neon (Ne): Orange-red
• Helium (He): Yellow or pink
• Hydrogen (H₂): Purple-red
• Carbon Dioxide (CO₂): White
• Mercury (Hg): Blue

The electricity passing through the gas excites its atoms, causing them to emit light at specific wavelengths, resulting in the characteristic color. This process is called electrical discharge.

Fluorescent Colors in Other Applications

Outside of neon signs, "neon" colors in paints, inks, and fabrics are achieved through the use of fluorescent dyes or pigments. These materials absorb ultraviolet (UV) light and re-emit it as visible light, creating a brighter, more intense appearance than conventional dyes. This is a different process from the gas discharge in neon signs. The intense brightness is what gives these colors their "neon" look.

The Difference Between Neon and Fluorescent

It's important to note the distinction: while neon signs utilize neon gas and other noble gases for their glow, the term "neon color" is more broadly applied to vividly bright colors, often achieved through fluorescence. The appearance of "neon" in many applications isn't directly related to the use of neon gas.