The term book-matched is used by designers, architects, and others obsessed with having to know everything about everything. In some way, this is said to promote good tone from the wood when it is eventually used for instrument making..One thing is for sure… if the wood selected for your instrument is not ideal for the purpose, then your insturment begins with a permanent handy cap which will limit its success.Tree selecting and cutting family from Northern British Columbia, Canada.
On the other hand, if we place the majority of the material outside the bandsaw blade, it is much more likely that the main part of the plank may collapse in on the cut, and screw it up. An additional advantage of putting most of the material between the fence and the blade is that drift will be minimized, and if drift does occur the blade will not ‘come out’ of the material (and ruin the veneer) – you will simply end up with a slightly thicker section of veneer.
Again, the thicker side of the trunk (from the center to the outside) is probably the best bet for violin plates; this being the wood from the sunny side of the tree trunk..The wood is normally naturally cured by stacking, putting sticks between the (slightly oversized) pieces to promote air circulation, and keeping it inside for a period of years; at least five years, with twenty years being even better.
Stand the book up on its spine now and imagine a saw going right through the book in the center parallel with the pages. Cross-section through a tree trunk.Some general tips for woodcutters is to only use wood cut in the dead of winter, and preferably during the dark of a new moon. Alternating pieces of veneer are flipped over so they face each other as do the pages within a book. I trust this will help you in selecting a matching option when working with resawn veneers.
Not only is the beauty of the natural wood highlighted to best effect, but the finished product really can look incredibly stunning. There are endless possibilities when working with wood veneer, and you’ll find over 200 varieties of wood to work with on the Oakwood Veneer Company website. Cross section of a tree branch or limb with the grain usually running at right angles to that of the piece of wood in which it occurs.
I believe the information on Wikipedia to be inaccurate in terms of what is required by the woodworking machine regulations and therefore not something that I would take as working procedures. But bookmatching has been done for ages even in small guitars when the size of the wood was not an issue. Certain stone slabs can also be book-matched with either complex or simple veining. Wood veneer panels are manufactured by slicing a very thin sheet from a wide timber.
With lumber in hand, I worked out my cut plan-where to make the cuts on each board to use as much good wood as possible, and jump over cracks and significantly warped parts where possible. A number of years back, a nationally repsected instrument dealer showed me a new Taylor with a four piece top… very cleverly spliced to look as a a two piece book matched top. Starting with the legs, I took a piece of 1/4” thick oak that had the right colour and a gentle curve that followed my shaping of the legs yet to be. I planed both faces of the veneer stock and sandwiched it between the two adjacent legs.
However, If we turn the wrong side up then we be cutting across the grain more which hurts sound transmission..For instance in the example at left we would want to cut out violin plates as illustrated:.Another thing to be concerned with it that different parts of the tree will transmit sound differently. That can only happen if in case of veneers, where the wood is sliced with a blade and there is no wood lost to saw kerf.
I’ll try to explain the bookmatching process simply do you know what it is. Grab a book off your shelf and put it in front of you. Two pieces of wood are matched together so that the two adjoining tops mirror each other… thus giving the impression of an open book. For most species, Panel End Match yields pleasing blended appearance and grain continuity.
Can be made up into any one of these symmetrical variations by stitching them together on the face side using veneer tape. Definitely get lots of practice with scrap wood before you try it with the nice figured wood. A panel or core product composed of small particles and wood fiber that are bonded together with synthetic resin adhesives in the presence of heat and pressure. Complex patterns, such as the chevron pattern of this William Switzer Zebrawood buffet, are quite labor intensive and can result in wasted scraps of wood. In figured wood this means the light streaks on one side are the dark streaks on the other.
Random Matching assembles veneer flitches without regard to grain pattern or color. Adding the veneer afterwards meant I simply had to cut the shoulders of the tenon equal to the existing shoulders. The grain of this piece even when professionally sawn shows the grain on both sides of a sawn/split adjacent piece can have different (and pleasing) shading. Rotary cutting is the only method of producing veneer that will produce whole piece faces. Slip matching is different from veneer book matching because the latter involves turned over alternating leaves.
Flat sawn: wood that has been cut in an orientation where the growth rings form an angle less than 45 degrees to the wood surface. You’d be lucky to find a couple of slabs of the same batch let alone enough to clad a room or complete a wall. Rip cuts are the most common cuts on the table saw, and involve cutting along the length of the board with the grain of the wood, splitting a larger board into narrower sections. Veneer-Core products are created from thin slices of wood which are glued onto core panels. I find that, with quarter sliced veneer, slip matching or a slip and turn works best, for grains and light refraction as you mentioned.
The nice thing that happens as a result of slip matching is that when you combine this with a Rift” or Quarter” sawn veneer, the joints between the separate pieces of veneer will not be very noticeable. Even then, if the wood is sanded for finishing some of the surface will be lost and the grain pattern can change slightly. Slip Matching: As book matching but involves joining veneers together, all facing the same way – without turning over the alternating veneer. Using one solid piece of wood for tops or backs would be scary on acoustic guitars. Thus, the back of one veneer meets the front of the adjacent veneer producing a matched joint design.
It is always better to cut your own edging from the top sheet in order to achieve a matching grain to the edges of your piece. A straight grained quartersawn piese of wood can often be matched so closely that it’s often hard to tell when one piece of wood ends and the other begins. I let it sit longer than usual and wiped it off unevenly to give the wood a distressed, almost burnt tone.
Laid up on plywood or veneer core, it’s a judgement call for whether to book match or not. Book Match: This is the most commonly used match in the industry and it occurs when every other leaf of veneer is turned over, like the pages of a book. This is typically used for veneer core plywood but is also seen commonly on birch plywood. The boards are taken across a knife which is at 75 degrees to the wood, and the veneer is peeled off of the bottom.