I started with a photo of me (at a medieval recreation event) and applied the adjustment layers. I didn't want to blow out the exposure on the white veil, so the contrast isn't as bold as it might be with a different photo.
Following along with the videos, I experimented with some colors, not referencing any color inspiration exactly.
After getting a handle on how the Gradient Map technique works, I started to get a bit more diverse with the color pairs, then branched out to a different image.
Continuing along with the lessons, I located a vintage illustration and played with the gradient and solid overlapping to create a finished graphic illustration.
I then went back to my original photo and applied the lessons on layer masking to create an effect that treated the foreground and background as two separate duotones. I didn't think the version with a more diverse pair of duotones worked as well as the version where the colors were more harmonious.
Next, I used the layered "overprint" techniques using vintage illustrations.
Using these techniques, I got a bit outside of my own style comfort zone and layered various duotones and blending modes to create a poster, just to see some of the possibilities.
After all this, I wanted to use the Duotone technique in a real-world project. I had previously created a CTA using a blue layer set to multiply over a colored photo, and while the look wasn't bad, and it worked with other CTAs in the set, I realized that a duotone effect would create a cleaner, crisper look.