I've carved an "icebergs" block and wanted to experiment with laying down some light undercolors before I print a dense blue for ocean. Here's how the print looked after three colors were printed, yellow, green and red:
Then I added the first layer of blue on top:
Here's a closeup.
I expect to go much denser with the blue in subsequent overprintings, and I'm curious to find out how much these undercolors will show through.