Types of veneer and cuts

Why the cut decides the look

A log is not a uniform block. It is made of concentric growth rings, radial medullary rays and a web of fibres that differs with the conditions of growth. How a saw or knife passes through it decides which plane is exposed, and so how the veneer looks.

A radial cut across the growth rings exposes the rays and gives a straight, parallel structure. A tangential cut along the log meets the rings at a low angle and gives the typical arched figure. Between these extremes lie intermediate cuts, each with properties of its own.

That has practical consequences for planning a pattern. A calm geometric surface needs a cut that gives calm grain; if you use arched figure as a design element, you need to know where in the sheet it is strongest and how it reacts to light. Decisions about the cut are made when choosing the veneer, not when cutting it up.

Direction of cut and run of the fibres

The run of the fibres in a sheet is a direct result of the direction of the cut. In a radial cut the fibres run mostly parallel to the long side and the face of the sheet. In a tangential cut the growth rings meet the face at a shallow angle, and the visible lines spread apart, run together or sweep in long arches.

Grain direction in intarsia refers to the run of the fibres within a veneer already cut. The cut sets the range of that direction: quarter-cut veneer has a narrow corridor (straight and parallel), while crown-cut veneer can show very different directions in different parts of the same sheet.

For geometric intarsia, that means how predictable the grain is depends on the cut. Quarter cut allows more reliable planning because the direction is more consistent; crown cut offers more life but demands a more careful choice of the part of the sheet you use.

Crown cut (flat cut, plain sliced)

Crown cut is the most common cut for hardwood veneer. The log, or a half of it, is sliced parallel to its length, so the face runs tangentially through the growth rings. The result is the typical crown or cathedral figure: large arches in the middle of the sheet that turn into parallel lines towards the edges.

• Character: lively, organic, full of movement. The figure creates depth and drama, and no two sheets are identical.
• Movement of the grain: strong in the middle of the sheet, calmer at the edges, so the direction changes within one sheet: in the middle the lines spread apart, near the edge they run parallel.
• Behaviour in light: uneven and changing. In side light the figure reflects differently with the orientation of the fibres, which deepens it but can also cause uncontrolled changes of brightness across an apparently uniform area.
• Strength of figure: high to very high, depending on the position in the log and the species. Oak shows very pronounced figure in crown cut, walnut can give wavy, flame-like patterns, ash fairly calm stripes.
• Suitability for geometry: demanding. The figure competes with geometric lines for attention and can overload small elements. Good for large, calm background areas if you use the calmer edge of the sheet.
• Contrast: crown cut can create light and dark zones within one wood that interfere with the contrast of a neighbouring species, so the figure has to be part of planning the contrast.

Quarter cut

For quarter cut, the log is first split into four radial segments, and each is then sliced across the growth rings. The face runs almost parallel to the medullary rays and at right angles to the rings.

• Character: calm, straight, controlled. The grain runs parallel to the length of the veneer. In oak, the rays show as silvery stripes or flecks that give the veneer its typical silky sheen.
• Movement of the grain: low to very low. The lines run consistently parallel, with no spreading and no arches, and the transition between the middle and the edges of the sheet is hardly visible.
• Behaviour in light: even and predictable. Because the fibres are consistently aligned, quarter cut reflects side light evenly and looks the same in changing light. In oak, the rays can create regular patterns of reflection in side light.
• Strength of figure: low to moderate, except in woods with pronounced rays such as oak or plane. In wenge, quarter cut gives very calm, parallel dark stripes without the dramatic variation of crown cut.
• Suitability for geometry: very high. The calm, parallel grain supports geometric lines instead of competing with them, and small elements stay readable against the quiet ground. It is the preferred cut for precise geometric intarsia.
• Contrast: stable and reliable. Quarter cut shows no uncontrolled changes of brightness within an area, so its lightness is more consistent and allows more precise planning of contrast between species.

Rift cut

Rift cut lies between the tangential crown cut and the radial quarter cut: the face meets the growth rings at an angle of roughly 30 to 60 degrees. In the narrower sense, rift cut (comb grain) is sliced about 15 degrees off the radial, so that the rays are cut at an angle and show hardly any fleck; in oak that is exactly why it is used.

• Character: moderately lively, striped. The lines run slightly at an angle, can spread a little and show a subtle movement without arches, livelier than quarter cut but more orderly than crown cut. Strict rift gives an almost pinstriped veneer without ray fleck.
• Behaviour in light: slightly uneven because of the angled fibres. In side light rift can show subtle changes of brightness that quarter cut does not, though much weaker than crown cut and controllable in most uses.
• Suitability for geometry: good, with limits. Suitable for main areas if the chosen sheet does not move too much; for very small elements, quarter cut is usually easier to control.

Rotary cut

Rotary-cut veneer is made by turning a whole length of log against a fixed knife and peeling the veneer off as one continuous sheet. The figure is very broad, with pronounced arches of the growth rings and often restless transitions. Rotary veneer goes mostly into substrates and plywood; the exception is species whose figure only appears in a rotary cut, such as bird's-eye maple.

For geometric intarsia, sliced veneers (crown, quarter, rift) are therefore the usual choice, and rotary veneer hardly plays a part.

Behaviour in light by cut

How a veneered surface behaves in light is not a matter of species alone but of species and cut together. In raking light, two sheets of the same species can reflect very differently if they come from different cuts.

Crown cut reacts most to changes of light, because the different angles of the fibres within the figure scatter light in different directions; some parts look clearly lighter or darker in side light than in diffuse light. That can be wanted, but it has to be anticipated.

Quarter cut behaves most evenly: the parallel fibres reflect consistently, and the effect stays more stable in changing light. That matters for desk objects, which have to stay readable in different room light and from changing angles. Rift lies in between: less dramatic than crown cut, less stable than quarter cut.

Figure and how to control it

Figure is the trade word for special markings in the wood beyond the ordinary grain: flame figure, bird's eye, waves, burr or fiddleback. These figures come from irregular growth, knots or particular positions in the log.

Crown cut is likely to reveal figure, because the tangential cut shows the structures of growth in section. Quarter cut hides many of them, because the radial cut divides them lengthwise rather than across.

For geometric intarsia, strong figure is usually a risk. Pronounced figure in a small piece of a pattern draws the eye and weakens the geometry; on large, calm background areas, though, subtle figure can add depth and life without competing. It pays to sort veneers by the strength of their figure: very figured sheets away from the main areas, calmer sheets or calmer parts of a sheet for precise geometric elements.

Contrast by cut

The cut affects how stable the contrast between two veneers stays in changing light, a point often underestimated when planning contrast.

Quarter cut gives stable, predictable contrast: two quarter-cut veneers with a clear difference in lightness, wenge and oak for instance, keep a similar perceived contrast in different light. Crown cut brings changes of brightness of its own: in a wenge and oak pair with crown-cut oak, a light zone of the oak strengthens the contrast in one place and a darker zone weakens it in another. That can be used on purpose, but it needs careful choice of sheets.

With very dark woods such as wenge the influence of the cut shows less, because its figure contrasts less in the dark. With light woods such as ash or oak, the visual difference between cuts is considerable.

Stability and how the veneer works

Quarter-cut veneer is usually more stable than crown cut. Its growth rings stand upright to the face, and since wood swells and shrinks much less radially than tangentially, the smaller movement lies across the width of the sheet. The risk of cockling and distortion before pressing is lower.

Crown-cut veneer, with rings at a shallow angle, cockles more readily, especially when the moisture changes between storage and use. Very figured crown-cut veneer can be hard to keep flat before pressing, which makes fitting harder and can increase drift in the press.

When cutting and fitting, quarter cut behaves more evenly at the cut edge, because its structure stays the same across the whole width. Crown cut can react unevenly where the rings run at an angle. For precise geometric work, quarter cut is therefore the safer choice in the workshop too.

Visual rhythm in geometric compositions

Cut and grain direction together create the visual rhythm of a geometric intarsia: the repetition of visual signals at recognisable intervals, made in veneer by lines of grain that continue across several segments or break on purpose.

Quarter-cut veneers with parallel grain can create a strong rhythm when several segments share the same direction: the even lines run from segment to segment and join the surface visually even where the cuts divide it. Crown cut tends to create contrast rather than rhythm, because its figure rarely continues across the boundaries of segments. That makes it less suited to patterns meant to flow across several elements, and well suited to patterns built on discontinuity and tension.

Cuts for geometric work

For geometric intarsia, quarter cut and calm rift are usually the more reliable choice. They meet three demands better than crown cut: the pattern stays readable, the surface looks even in changing light, and the veneer cuts predictably. When the veneer itself says too much, it competes with the composition instead of carrying it.

Stability in light matters especially for desk objects, which are seen by morning light, under a desk lamp and in the evening. For dark areas, wenge with the most parallel stripes possible works well; light woods such as oak and ash look clearest with calm grain and little arched figure. The striped figure of the Reihax mahogany shows that lively but orderly figure can carry too (mahogany).

Crown cut is not ruled out. Its calm edges can be used for precise pieces, and on large background areas its figure can be used deliberately for life. The condition is that the decision is planned, not the result of a random choice.