Alexander Grabovetskiy, woodcarver, School of Woodcarving · Published 2017
Why does an ancient acanthus leaf have a V cut inside it?
Quick answer: A V groove inside the lobe is the shape a knife produces fastest, and the earliest carvers worked with little more than a blade. That is why the oldest acanthus forms all carry it. Byzantine work still shows some grooves, and later periods gave them up almost entirely.
The oldest acanthus leaves carry a V groove inside every lobe, and the reason is the tool. A carver with a knife and very little else produces that shape faster than any other, so the earliest work carries that shape. Later periods owned more tools and gave the V up.
Which means the groove you are carving today is not a decorative preference. It is a fossil of an ancient Greek workshop, two and a half thousand years ago, and the fastest way to understand it is to put the V tool down and do a whole lobe with a chip carving blade.
Several lobes here went that way, and the middle lines they left came out noticeably sharp.
Key takeaways
- Never dead centre.
- Roughly an eighth toward the leaning side is the usual shift, and the whole purpose of it is to put a sharper shadow on the flank that stands higher rather than splitting the light evenly down the lobe.
- Start shallow, then deepen.
- The high ridge beside your groove is a boundary, and the moment the wing of the V tool crosses it you have carved away the thing the groove was supposed to define.
- A knife does this whole job, and the ancients prove it.
- Turn a curl slowly.
Where does the centre line go on a leaning leaf?
Toward the lean. I shouldn't say never about anything, and sometimes I do put a line dead centre, but most of the time the leaf is tilting one way and the groove follows it. Here the lobe leans left, so the left side stays wider and the line moves right.
How much does it move?
About an eighth. Locate the true middle between the two edges of the detail, then walk the line that far toward whichever flank will stand higher. Hard to explain and obvious once you look at the finished lobe under a lamp.
Which side gets the shadow?
Whichever one is riding up. A lobe leaning left has its right flank riding up, light comes across the panel, and the groove pushed toward that high flank throws a sharper dark line along it. Even out the groove and the shadow evens out with it, and the lobe flattens. Such is the entire mechanism of carved ornament at reading distance.
What stops the tool going too far?
A ridge you can already see along one side. Look along the lobe before you lean the V tool over and there is a high point running down one side, and that ridge is your boundary. Use the right hand wing as a chisel up to it and then stop. Cross it and the shape you were defining has gone.
Can a knife do the whole thing?
Most of it, and quicker than I expected the first time I tried. Straight in on the line, then a second pass from one side, then turn the panel and come in from the other. The middle line a blade leaves is sharper and cleaner than a V tool manages, because a knife has one edge doing the work instead of two meeting at a corner.
Low bevel on the approach. Gradual, right up to the line, and the waste lifts out.
What did the ancient carvers actually own?
A knife, almost certainly, and very little beside it. Now think about what that does to a design over a few centuries. The V groove is what a blade produces in two passes, so the plant they carved ended up with a V down every lobe of the relief. Centuries of carvers then copied that form, people with better tools who no longer needed the shortcut at all. Tradition is often somebody else's constraint.
Why a spoon V tool for small work?
Thumb control. The 12A spoon at 3 millimetres lets me press my thumb into the curve of the shaft. That puts the force where the edge is rather than back at the handle, and I can lift out of the cut the instant I want to. Nobody says you must use a spoon. On small details nothing else I own comes close to one.
How small does the gouge get?
Small enough that mine has no numbers on it. For a concave nick right beside a pipe I reach for a little dockyard gouge in the limewood, roughly 3 millimetres, possibly two and a half, and nobody ever stamped a sweep on the shaft. Then a number 5 at 3 millimetres rounds the area off. Several of the most useful tools I own carry no marking at all.
Which side of a gouge cut comes out clean?
One of the two, never both. Any gouge travelling across a surface meets the grain running with it under one half of the sweep and against it under the other, so one wall comes out glassy and the other slightly torn. Work out which is which before you commit, and put the clean one where it will be seen.
How deep is too deep?
Any groove reaching the level of the floor has gone past it. Carve a V that deep and there is a hole under the leaf, the eye reads it as a gap rather than a fold in the carved surface, and the whole thing stops looking like a plant. I want no holes underneath. Deep enough to hold shadow, shallow enough to stay attached.
Does every detail need a centre line?
This one did not get one. I looked at a small lobe near the edge, decided a groove would clutter it, and used nothing but a sweep on it. Whether that was right I will find out when the panel is undercut and I can see the whole thing together. Leaving a decision open is allowed.
When did the V cut die out?
Gradually, and it was on its way out by the Byzantine period. Byzantine work still carries some grooves, particularly on the larger lobes, and after that the carvers of later classical revivals stopped cutting them almost entirely. Anyone carving a Greek leaf without the V has carved a handsome leaf from the wrong century.
How is a curl turned with a V tool?
Slowly, with the tool resting on a finger. I lay the shaft across one finger and hold it with another, and that finger becomes the governor on how far each pass travels. Running off a spiral and ruining the line is very easily done. Manage it, and get one long unbroken groove following the spiral round, and the result is beautiful.
Watch the depth on the turn. A curl wants to get deeper exactly where it should not.
Where do you strop, inside or out?
Inside bevel only, on a gouge like this. I stopped mid lobe to touch up the number 7 and went nowhere near the outer face, since that is the face whose geometry sets how the tool enters the wood. Round the outside bevel and the gouge stops behaving. Polish the inside and it cuts like new.
What is a number 1?
Flat, and worth knowing because the numbering confuses people. Number 1 is dead straight, so it is neither a gouge nor a veiner, and mine is 8 millimetres with a bevel ground on both faces. They also come single bevelled. I used its corner to take one side of a lobe in to the centre line, which a knife would also have done.
More than one way to the same result. Most of carving is like that.
Which way does the grain run under a chisel?
Downhill from the peak, and locating that comes first. Look along the lobe, work out where the surface rises highest, and work away from it with the grain falling ahead of your edge. Reach the far side and the grain has reversed, so spin the work and come back the other way. Forcing a pass through that change is how a lobe ends up split.
Why must the two lines stay apart?
Where they touch, the eye stops seeing two leaves. Run the groove of one lobe into the groove of its neighbour and the pair merges into a single shape with a kink in it. Before any tool goes down I check that every centre line ends short of the next, and on this panel one pair was heading straight for each other.
The gap does not have to be visible from across the bench. Separate is enough.
What does a low bevel buy on the approach?
Waste that lifts instead of tearing. Coming in to the line with the blade held almost flat means the shaving thins out gradually and parts company with the surface exactly where you wanted it to. Come in steeply and the same pass levers a chunk out. One more approach from the opposite side and the whole piece snaps free.
Is the 45 awkward from one direction?
Very. A 45 degree V tool has a narrow throat, and when a lobe curves back on itself the handle ends up somewhere your hand cannot follow. Which is when I set it down and pick up the knife, which has no such geometry. The tools course covers why a spoon or a short bend solves the same problem differently.
Where does this leaf sit in the sequence?
Between the one that came before it and the one that follows. The Corinthian leaf teaches proportion, this Greek one teaches the groove and the curl, and the Roman version that comes after gives the whole plant more flesh. The drawing lesson at the start of this course is where the proportions were set.
How the tools divide this lesson
| Tool | What it does here | The reason you would reach for it |
|---|---|---|
| Number 12 knife | The whole groove, in three passes | Sharpest middle line of anything here, and it is what the ancients had |
| A 45 at 6mm | Long grooves, and the curl when you are patient | One travel, rather than three separate passes with a blade |
| The 12A spoon at 3mm | Everything too small for anything else on the bench | Thumb on the shaft, and you can escape the cut instantly |
| Number 7, 14mm | Taking a flank in toward the line | Twenty years on my bench and still the one I pick up |
| Number 1, 8mm | Flattening and blending | Its corner does what a knife does, with more control behind it |
The tool I have had twenty years
A number 7 at 14 millimetres, European length, which is a little shorter than a full size handle and sits better in my hand for it. I own several sevens. This is the one that gets picked up, and it has been getting picked up for about twenty years. Tools you keep that long stop being equipment and become a way of working.
Micro rotations, again
Every single pass on this panel turns while it travels. Not a push, not a scrape, a slight rotation so the edge slices across the fibres rather than crushing into them. It is the same motion in the eyes and pipes lesson and it will be the same motion when this leaf is undercut. Learn that motion once and it will serve you for everything that comes after.
Why more than one tool reaches the same result
Because the wood does not care which handle you are holding. A flank can come down to the centre line under a knife, under the corner of a number 1, or under a seven driven from the edge inward, and nobody looking at the finished surface could tell you which. Pick whichever one your hand is already on.
Tiny places are the exception, and there the tool genuinely does decide.
What is unfinished
Quite a lot of it, honestly, and that is the perfectly normal state of a panel at this particular point. Several lobes I would call somewhat happy rather than done, the curl could go deeper, and one side of the big detail still bothers me. None of it gets settled until the undercutting, because undercutting the leaf off its floor changes how every surface above reads.
Sharpen the inside bevel, find your high points, and try one lobe with nothing but a knife before you decide the V tool is faster. The previous lesson put the middle lines off centre, the tools course covers spoons and long bends and what a number 1 actually is, and sharpening decides whether any of it works. The rest of this course sits behind one door. Shall we carve?
How it's done
- Read which way the lobe leans. That decides everything else. The flank standing higher is where the shadow has to fall.
- Walk the line off centre. About an eighth of an inch from the true middle, toward the lean.
- Make sure the lines stay apart. Two centre lines that meet at the join read as one mistake rather than two leaves.
- Start shallow. A light pass the whole length first, then deepen it. Committing at full depth on pass one leaves you nowhere to correct.
- Stop at the ridge. The high point beside your groove is the boundary the wing of the tool must not cross.
- Try a lobe with the knife alone. Straight down on the line, a low bevelled pass from one side, turn the panel, a pass from the other.
- Turn the curl on a finger. Lay the shaft across one finger and let it govern the travel. Slow, and mind the depth all the way round.
- Bring the flanks down. A seven at 14 millimetres, edge inward to the centre line, or the corner of an 8 millimetre number 1. Find the high point, work downhill, then turn.
Frequently asked questions
Why is the centre line moved off centre?
To put the shadow on the flank that stands higher. A groove splitting the lobe evenly throws even light and the surface reads flat, while an offset groove exaggerates the turn and carries at a distance.
How far off centre should it sit?
Around an eighth on a lobe of ordinary size. Locate the true middle between the two edges first, then move the mark that far in the direction the leaf is leaning.
What does a spoon V tool give you?
Control on small work. The curve of the shaft takes a thumb, which puts your pressure right behind the edge instead of back at the handle, and lets you lift out of a cut the moment you want to.
What to carve next