Faber Castell Pitt Artist's Pen Big Brush are watersoluble... sort of

Checking the product videos in the newly redesigned Faber Castell Website, I noticed the tip that the Pitt Artist pens inks could be blended to some degree with a water loaded brush right after applying a pen brush stroke and right before the ink dried in a permanent pattern. Narrow window of opportunity, but it worked well creating watercolor wash-like effects on smooth Canson bristol paper. While I was aware that their inks were water based, odorless, waterproof and permanent once dried, it had not occur to me to try to spread the pigment with water before the inks had a chance to dry on the paper. Since the Big Brush format creates a much juicier pigment loaded stroke than the nib pens or the original brush pens, it allows a few more seconds to manipulate the Pitt inks in this fashion.