
I think it is for the nature of the image itself as well as the sparcity in the sense that it didn't really have an edge. I had to impose that be adding a visual thin black frame.
The other monotype of Sharron's, that I quite was/is the one here with the darker palette of blues. I found the initial image in the Guild's 20th Anniversary exhibition which is online at their website. The blue image I located at Sharon's own website.

You can check out more of her work at her website

There was one other image which I found to be really calming, relaxing and just very visually appealing was that of a face and a turtle perhaps(?) underwater. Its by an artist called Linda Horvitz Post. More of her work can be seen on her Saatchi website portfolio