Showing posts with label bellini. Show all posts
Showing posts with label bellini. Show all posts

Saturday, 2 November 2019

Building a 13 Course Lute, Start to Finish, 6: the Rose

Hi again. Today I shall talk about the 13 course lute's rose--preparing the belly for the pattern, gluing the pattern on, and carving the rose. There's much ground to cover, so let's get started.

As I mentioned at the end of the last episode, after thicknessing the belly I placed it in the low-humidity light box for 24 hours, then gradually allowed the humidity to rise over a couple of days until the belly stabilized in the ambient humidity of my workshop (about 40-45% relative humidity.) I'm now ready to thin the rose area, to prepare for gluing the pattern.

The belly centreline and rose position are marked. The central area of my belly is around 1.5mm thick; I'll want to thin the rose area to just under 1mm.

I use a small, curved fingerplane to remove most of the material. It seems to work best (to minimize tear-out) to plane diagonally across the grain. I can only plane up to the belly centreline, since the grain direction will reverse on the other side of centre. I'll need to approach from the opposite direction.

I work in a crosshatch pattern, over an area that is slightly larger than the diameter of the rose pattern I'll be using.

I do the fine thinning of the rose area with a small, sharp hand scraper. I don't want too abrupt a transition from thin to thick, so I also use it to blend these areas.

The rose pattern--photocopied onto 60 lb. watercolour paper--is cut out with about 5mm extra width around the perimeter. I locate it very carefully, and hold it in place with one hand...

While with the other I spread hot hide glue under one side of it, then the other, and then on the top of the pattern. The paper more or less becomes saturated with glue, and the glue on the outside acts as a lubricant for my finger to rub the pattern securely in place, and press out any air bubbles.

Once the pattern's on, I set the belly aside overnight to dry. I can begin rose carving the next morning.

I'll mention one thing about the glue itself. When I glue on a rose pattern, I mix a little alum into the glue, by dissolving a bit in a dish with hot water, then adding it to my glue jar. Adding alum tends to counteract (a little) hide glue's tendency to contract as it dries--a sometimes-useful, sometimes-maddening property. In so doing, I hope to minimize shrinking and distortion of the rose pattern.

My rose carving station--cutting mat, reading glasses, a clean, soft brush, a block of wax, and a photo of the original pattern, which is from an early-17th century archlute from the Sellas workshop.

This rose is going to eventually have a chip-carved border, so before I can begin punching out the pattern I need to do some preliminary layout work with my compass. (One foot has a sharp point, and the other a small, sharp blade.) The first step is to find the true centre of the pattern--which, owing to distortion from the gluing process, may or may not be as marked. I need to adjust the compass and work by trial and error to find the true centre point.

Once I've found the centre, I can transfer it to the topside of the belly by pressing a fine pin all the way through. If I'm careful and don't push too hard, I can make a very tiny mark that will be visible on the top of the belly but won't mar the pattern.

Once I've got that point, I place directly over it a small piece of plexiglass with a pin-mark in it. This is my centre point, and I can use it to lay out all the circles I need for the various rings of the chip-carved border.

Here's a good look at the circles that I've scribed. I don't push too hard with the compass to deepen the cuts--I've found that doing that can distort them pretty badly. Instead, I scribe them fairly lightly, and at a later stage I'll deepen them with my carving knife. 
These are my two main rose carving knives, both made with lengths of 2mm graver steel set in pear handles. The upper one is shaped as a small chisel, while the lower one has a fine, slightly curved knife edge.


Quick note on the carving station. I have three roses to carve, for three lutes; each will take about 24 hours, or 3 good, long days at the bench, making 9 days in total. I made it only a couple of days before... umm... certain parts of my anatomy rebelled, and I had to reconsider my method of work. For the first time, instead of sitting, I decided to try a stand-up carving station instead. I'm happy with the result: the roses turned out nicely, and various parts of my physical person were thankful as well.

I 'punch' the pattern out in two stages, using both of my knives. First, I make a relief cut about halfway through the wood, along all the lines...

Then cut at an angle into those outline cuts, to remove a chip of wood.

I go over the entire pattern--except for the outer edge--making these 'relief' cuts.

Then I use my tiny chisel to punch through the remaining thickness of wood.
Why do it in two steps? Well, I used to use just the chisel to try to cut all the way through, but found that it's impossible for me to shape and sharpen a chisel that will cut well (and I mean almost flawlessly) all the way through the 1mm thickness of wood. I almost always found that instead of a pure cut, the chisel would compress some fibres, and I'd end up crumbling or even breaking out pieces--especially pieces cut across the grain--that I'd then have to glue back in place. It was a pain. I'd spend time fixing, and the pattern would end up weak in crucial areas. This two-part method takes a bit more time to do in the initial stages, but I end up with a physically stronger rose pattern that allows me to be more bold with the top carving. I actually end up saving time, and get a better result.

The majority of the pattern is punched through from the back...

But the outer circumference is punched from the front. The chisel seats nicely in the scribed ring, and I get a very round and orderly-looking result.


I keep my photo of the original rose close by as I begin work on the top carving, because I don't want to confuse the over-under pattern that 'weaves' the organic and geometric parts together.

I us my knife to 'peck out' all the points where the elements cross; all the 'crotches' among the vines and leaves; and all the terminus points of what will become parallel v-channels in the geometric elements.

I'm always amazed by how making single, sweeping cuts to relieve the edges of the vines makes them instantly come to life.

Three cuts are enough to finish these leaves--one down the middle, then one small scooping cut at an angle on each side of it. (It should go without saying that one needs to be conscious of grain direction when doing this; it usually works best to follow the grain 'downhill.')

For the smaller leaves, there is no actual cut, just a pin-prick which I then widen by twisting a small, sharpened point of my own making.

There's the profile. It's a salvaged broken drill bit set into a piece of dowel for a handle. The angle of the tip is pretty flat, and I've ground some (rather random) facets into the sides. It seems to work well.

I make the parallel v-channels with three cuts (all of them free-hand, without any kind of straightedge, just in case you were wondering.) The first cut is the most crucial. I mark out the spacing between them first, by making a couple of parallel knife-pricks.

Then I set my little curved blade in one of the marks, and push it away, rather lightly, in a slightly rocking motion, toward my destination, the terminus point that I've already marked.

Then I pull the knife back toward me, hopefully in the very same line I've just made, confirming and deepening the cut. (It's hard to say exactly how deep the cut is, but I suspect it's at least halfway through the thickness of the wood.)


Then I make an angled cut alongside the central line, first on one side, then the other.

The result should be one nice, crisp, v-shaped channel, sharing the  width of wood in an amicable way with another nice, crisp, v-shaped channel.
And this is where we're at so far: all the vines, lines, and leaves as crisply cut as I can make them. All that's left to do is define the outer scribed rings, and execute the chip-carved border.

First: deepen the scribed rings. Again, I'm going about halfway through the material.

Then: lay out the border. I make these cuts by eye, estimating the angle of the cuts and the width between them. I use the geometric elements of the rose pattern to help orient the cuts.

The border's all laid out--not with perfect uniformity, perhaps, but hopefully with some assurance and energy.

Now, the chip-carving. With the cuts you see here, I'm working with the grain and cutting away from me, but as I get round to the top of the circle I'll be going against it, and will need to reverse my knife blade to cut toward me.
Another v-channel. Always cutting with the grain, I'll need to change my cutting direction four times on this outer side of the ring, then four more on the inner side. (On the very outside ring, I won't make a v-channel, only a bevel cut on the inner side.)

That's about it for this rose. I'll go over it once more with a very sharp knife to relieve little shaggy edges that catch my eye, and perhaps tidy up some cuts that don't quite make the grade. In general, though, I try not to revise my work too much. My sense of how the ancient makers cut their roses is that they worked quickly and surely, and didn't look too much in the rearview mirror, but pressed on to the next job. This gives their work a liveliness and energy that I find very appealing, and I strive for it in my own rose carving.
So there we have it: nine days' work at the rose carving bench. Seems like a lot of time to spend on a purely decorative item, but then again the rose is where, more than practically any other place on the lute, the maker asserts his/ her/ their craft. It's really an emblem of beauty for its own sake.

But it is a long time to stare intently at very small things. I'm going to go outside now, and look at the horizon for a while. I'll be back with the next instalment of the blog in a few days; until then, please have a look at the two other roses I carved alongside the 13 course rose, during my nine-day stand.

For the 8 course lute: the rose pattern from the 1592 Venere, in the Accademia Filarmonica, in Bologna.

For the 7 course lute: a variation of the Gerle/ Bellini pattern, drawn by Ray Nurse.



Monday, 4 June 2012

The Name of the Rose

Hi again.  I have a small correction to make.

My last post contained a reference to an early 16th century painting in Urbino.  Michael Stover, who took the photo of the painting (and whose 6 course lute I modeled after the lute in the painting) got in touch after I published the post to clarify some information about it.  Here's what he wrote:

Hi Travis,

I was very interested to see your blog discussion of the two 6-

course lutes. Kenneth Bé just told me about it. Very nice. There's
one small correction -- the angel holding the lute is at the bottom
of a large painting on canvas of the coronation of the virgin in the
Cathedral art museum, rather than a fresco. (We don't want anyone
going hunting for a fresco that isn't there.) I haven't been able to
find out any information about who the artist was. Kenneth has seen a
photo of the whole painting in situ, and tells me that it's a typical
"incoronazione" of the 1540's.

Isn't the Gerle lute supposed to be later than that? If so, the

Urbino lute would be the earliest appearance of that design, and it
ought to be called the Urbino rose!


Michael brings up an interesting point about the name of the rose (to coin a phrase), which I'll get to in a second.  First, though, a bit more about the painting.  (Michael tracked down the images and information that follow.)

The painting is by Pierantonio Palmerini, entitled "Madonna con Bambino e Santi" and dates from 1532 to 1535.  The painting is preserved in the Museo Diocesano Albani.  Taken from the museum's website, here is the full painting in all its glory--
Michael also tracked down a very nice detail shot of the lute and player.  I reproduce it here courtesy of the photographer, Terry Clinton (visit Terry's flickr page here.) 
Here's a close-up of the belly of the lute, showing very clearly a segment of the lute rose design that I have, up until now, been rather blithely calling the "Gerle" pattern.
 Just to refresh your memory, here's my version of the full pattern.
Michael's question about what we should call this lute rose pattern is an interesting one.  The Gerle lute, from which this pattern was originally traced, dates from the 1580s (so says the Vienna Kunsthistorisches Museum, where it's housed); the Urbino painting, which shows the same pattern, dates from 40 to 50 years earlier.  So as Michael asks, why not call it the Urbino rose?

Well, for one thing, the Urbino painting isn't necessarily the earliest representation we have of this rose pattern.  There's another Madonna and child with saints from the 1520s showing a lute with this rose (the image is from David van Edwards' website)--
Giovanni Antonio Pordenone (1483/4 -1539)
Madonna and Child Enthroned with Saints. c. 1525
Parish church, Susegana (Treviso). (Reference courtesy of Gernot Hilger)
And, as Ray Nurse reminded me last week, Bellini's San Giobbe Altarpiece, dating from around 1500, has a lute with a rose that's a close variation of this design.
If you can't see that too well, here's my recent version of Ray's Bellini pattern.

So it seems pretty clear that this rose pattern was indeed around for a long time before Georg Gerle took a stab at it in Innsbruck in the 1580s, but just how long, we can't really say.  The geometric pattern which underlies it, the 6-pointed "Star of David," is of course a very old motif in middle eastern art, and serves as a constant reminder of the lute's 'genetic code,' the eastern origins of the instrument.

I suppose the reason why we call the pattern the "Gerle" is that Georg Gerle's version is simply the best exemplar we have of it.  It's clearly, cleanly and quickly carved, and, to my mind, fairly vibrates with the creative energy of the craftsman.  Like so many of the best old rose carvings, there's an almost monumental kind of simplicity to it.  Have a look.
Grant Tomlinson photo
The pattern was very popular throughout the renaissance and baroque periods; Robert Lundberg estimates that around 30% of the extant old lutes use this pattern in one form or another.  Here are three examples from my own repertoire.

This is a rose I carved for a large 10 course lute--the pattern's taken from a Venere lute of 1619 (it's basically the Gerle pattern with a double chip-carved border). 
This rose was carved for an 8 course lute.  The original design is from a Sellas archlute of the 1630s.  As you can see, the geometric elements (the 6-pointed star) are identical to those of the Gerle pattern, while the organic (curved) elements have been replaced by a vine and leaf pattern.
Finally, here's a triple-rose variation that I just completed last week, for a new 12 course lute.  The pattern is taken from an archlute by Giorgio Sellas, from the 1620s, and uses cut-down segments of the Gerle pattern in a really ingenious way.