I think Mike has a valid concern whether there will be damage in the long term. It is definitely a good question to ask. He used a 100 year old photo as an example in this post. Considering the age of his example photo, "long term" could be defined as 25+ more years in the future. Although I have been removing editor's ink (using water) for several years, I don't have a 25 year old sample to judge whether damage occured as a result of using water.
I will update this post in 15 years when I have a 25 year old post-removal using water example.