Oh this is really interesting to see!
I don't if it is appropriate ti ask this here but I'll just shoot : Does the blue lines disappear if you scan the paper in black and white (I think that's what I rememeber)? Or does it disappear after you color scan it and change color mode to grayscale + adjust the contrast on photoshop?
The blue lines disappear after Rachel erases the page when she is done inking the pencils.
Oh! Wow, ok, Thanks! I also remebered that with some shades of blue or red, the lines disappear after you photocopy it. Same with the blue lined comic papers that they sell in stores. XD. Thanks for the reply ^^.
I find your work very informative. It is amazing.