The compound curve
Okay. Ten lessons in, and today we're combining the overturn and the underturn into one shape. That's really all a compound curve is. It's an underturn that rolls straight into an overturn, or the other way around, without stopping in the middle.
You've already got both pieces. You just haven't had to hand them off to each other yet.
What it actually looks like
Picture the letter "n" for a second — not writing it yet, just picturing it. You go up, curve over the top, come down, curve under at the bottom, go back up, curve over again. That whole thing, that up-over-down-under-up motion, is built entirely out of the overturns and underturns you've been drilling. The compound curve is just... two of them, connected, sharing one stroke.
Same idea shows up in "m," in "h," in the humps of a lowercase "u" if you flip it around. It's everywhere once you know what you're looking at.
Setting up
Same paper, same pen, same guidelines you've been using. If your guideline sheet got coffee on it or you lost it under something, print a fresh one. Don't try to eyeball the baseline and the x-height today. This stroke has more moving parts than the single curves did, and you want the lines doing some of the thinking for you so your hand doesn't have to.
The motion, broken down
Start at the baseline. Thin upstroke, light pressure, going up and slightly to the right, same as you've practiced. When you hit the top of the x-height, that's where the overturn starts — you curve over the top, and as you come down the other side you start adding pressure. Downstroke, thick, controlled, all the way back to the baseline.
Here's the part that's new: instead of lifting your pen, you keep going. At the baseline, you ease the pressure off — this is the switch we talked about back in lesson four — and you curve under into the next upstroke. Thin again, up to the top, and if you're doing a full compound curve like an "n," you overturn one more time.
So the rhythm in your head should be something like: light, heavy, light, heavy. Not four separate movements. One continuous one.
And the thing is, most beginners try to draw this shape instead of feel it. They think about where the pen needs to end up instead of what the pressure is doing right now, in this instant. Slow down. I'd rather see you do three of these carefully than a whole line of them fast and sloppy. You're not behind if this takes you longer than the single curves did — it should. There's more happening.
A caution on pressure here specifically
This is where I'll bring up my first pen again. I ruined my very first brush pen in about a week because I pressed straight down on it like a pencil, no taper, no release. Frayed the tip clean out. I still keep that pen in my cup at the counter so I remember what it looks like when pressure goes too far.
The compound curve is exactly the stroke where that habit sneaks back in, because you've got two pressure changes happening close together and it's tempting to just mash down through the whole heavy part instead of easing into it and out of it. Watch your hand, not just the ink. If your fingers feel locked or your knuckles are white, you're pressing like it's a pencil again. Ease up.
Practicing it
- Draw a full line of just the underturn-into-overturn shape, no letters yet, just the curve itself, over and over.
- Then flip it — overturn into underturn — and do a line of that.
- Then try connecting three in a row without lifting the pen, which is basically an "n" shape stretched a little.
Pressure is the whole thing here still, same as it's been every lesson. Fancy shapes are not the goal. Thick down, thin up, and the compound curve is just proof that those two things can talk to each other without you having to stop and think between them.
Before next time
Get a full page of compound curves done, even if the first half of the page looks rough. The back half of the page is usually where it clicks.