I am sorry to report my experience with a rogue Micron archival ink pen. I have used a number of these pens in drawing on cotton muslin fabric for products to sell in my Etsy store for a while. Never having had a problem before I was not aware of the possibility of one with these pens. I recently began using a new pen and it created very bright black lines. I assumed it was the newness of the pen and would eventually tone down. While putting together one of these drawings into a project I used water to mist and iron it. To my sad surprise the ink began running and ruined the drawing. Because I use a number of different pens on one piece I wasn’t sure which finished drawings had the potential of ruin if exposed to water. So, I have tested all my present drawn pieces with misting water to check for running ink. These pens claim to be “waterproof, chemical resistant, fade resistant, bleed free, quick drying and pH neutral”. I have found them to be so until now. I will be writing the company for their thoughts on this product.