Cystine is the oxidized dimer form of the amino acid cysteine and has the formula (SCH₂CH(NH₂)CO₂H)₂. It is a white solid that is slightly soluble in water. It serves two biological functions: a site of redox reactions and a mechanical linkage that allows proteins to retain their three-dimensional structure. It is common in many foods such as eggs, meat, dairy products, and whole grains as well as skin, horns and hair. Wikipedia
THE ELEMENTS SERIES – our take on a collection of the essential colors of any writing ink collection. These inks makeup a set of ‘simple’ colors, tasked with coloring the basic spectrum of pure colors. These chemistry-themed inks were our first foray into the ink world, and have stuck with us ever since.
Cysteine brown shimmer fountain pen ink is a deep rich saturated brown with shiny gold shimmer.
Handmade in Maryland.