Universal fit gas mantels.
Every gas lantern needs a mantle. It is one of the most crucial parts. A gas flame alone does not spread much light. Thus you need a catalyst to gain a proper lamp.
Gas lanterns use oxide.
These oxides are being created by burning special kinds of salt that are applied to the surface of the mantle’s fabric.
Depending on the salt the flame brings it to glow in a colder (“white”) or warmer (“yellow”) light.
When setting the mantle on fire it will burn, leaving a construction built on salt crystals.