I am looking for ways to create razor sharp edges of watercolor paintings.
I provided an exeample that I found online from a paper manufacturer.
Was wondering how on earth they managed to stop the watercolor ink from flowing into the edge of the papier in such a straight line in the margins?
Ordinary painters' tape would cover the margin but the ink would surely creep underneath it making the edge less sharp right?
How can one achieve such a razor sharp white margin, on rough paper when using watercolors?