The loveliness of Quink

Isn't Parker's Quink ink just lovely when you water the lines?

I was reminded of this when someone posted a pen and wash on fb today.

This is black Quink.  It separates into a gorgeous array of blues and browns when it gets next to water.  
(Just a little sketch from a magazine - on cartridge paper, dip-pen, black Quink and water wash)........

Quink Magazine Girl

Detail - Quink Magazine Girl