Given that the pen writes for 1.2 miles, we may divide 1.2 by 0.009129786 to calculate miles per ounce of ink. This is a stunning 131.44 miles of ink in the bottle, but we're using feather pens and assuming they use twice as much ink as a ballpoint pen, so it comes to a still-impressive 65.72 miles of writing. Feathers are very thin strips of bird skin or hair used for drawing or painting. The word "feather" comes from the Latin fauces, meaning "seal." The first known written reference to feathers as we know them today was in 1556 by Martin Luther. He described them as "little strips of leather" used by vintners to distinguish their wine. Ink is the fluid that fills the chambers of a pen and allows it to write. It is made up of water and dyes that have been mixed together to create different colors. There are two types of ink: soluble and permanent. Soluble ink will disappear when exposed to water while permanent ink will not dissolve in water. Both types of ink need to be cleaned from the writing surface after use. If you own a luxury hotel, then you probably use gold ink on your invitations because it is considered a symbol of honor. Black is also acceptable if you want to show respect for the event's theme or location. Otherwise, go for color! The more shapes, patterns, and textures in your ink design, the better. It will make your invitation unique.