I'm guessing you've been watching RJBWoodturner's videos. It looks like the blanks have turned out good, let us know how it goes.
It was still up last time I looked. if I can get to turn a pen over the weekend I will let yall know how it turns out.
I tried this process in a segmented bowl, using three layers for color between segments. After having it come apart on the lathe several times at the paper joints, I set it aside as a failed experiment. It acted just like the paper glue joint between a bottom of a bowl and the waste block. Granted, the weight and size of the bowl likely contributed to the failures along with the vibration forces from turning. On a pen blank, I imagine it will work fine.