I16. Dr. Ph. Martin's Iridescent Calligraphy Colors.
These are great for pointed pen and they flow out of a broad-edge pen like ink. 1oz glass bottles with dropper top. Colors can be mixed. Truly waterproof when dry. The manufacturer says they are lightfast. Copperplate Gold is the most popular color (Copperplate Gold is listed here as "Gold"). Use rubbing alcohol to thin for better flow in your pens, especially broad-edge pens.
VERY GOOD QUALITY AND THE COLOR IS BEAUTIFUL
BEAUTIFUL COLOR WHEN IT DRIES. WRITES VERY SMOOTHLY. GOOD QUALITY PRODUCT