Great work with a novel idea !!! . I too would like to hear more about this technique, Please.
You must have had to work VERY quickly.
What did you use for the coloring agent ? . Looks like a powder of some kind.
I am wondering if it might be a good idea to mix the color with just the resin in 5 or so puddles and then add the hardener to each puddle, one at a time. . You could apply the epoxy in each puddle right after adding the hardener. . Seems this would give you more time to work.
Excellent Pen, David.
Brilliant Concept and Execution.
That is Really "Thinking Outside the Square".
Like others, I would love you to share more about What you used, and How you did it.
Congratulations,
Brian.