It is not obvious to most dealers, buyers or even experts in the field, but the simple difference between sawn or sliced veneer material provides absolute proof of the date of the furniture. There are few elements of furniture construction which are as conclusive as this difference in how the veneer was produced.
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of wood rising". This saw made veneer much more available and regular in thickness, and the cabinetmaker no longer needed to use the toothing plane on the veneer. However, he continued to use the toothing plane on the ground work, as that wood was still surfaced by hand tools.
In the 18th century, hand sawn veneer was uneven in thickness, much thicker and irregular saw marks can often be visible. The machine sawn veneer was still thick (1.5-2mm) but regular in thickness and often shows the regular saw marks on the glue side. When the surface is refinished many times and the veneer gets quite thin, the refinisher can see the saw marks through the veneer, and knows to stop sanding before he pierces the surface. The saw marks look like very even and parallel marks about 1mm wide, and are always perpendicular to the grain direction.
As the sawing of hardwood veneers was difficult and time consuming, it was expensive. In addition, about 50% of the wood was lost in sawdust. The mechanical saw was also expensive and required a technician to properly sharpen and control the cutting. It took as much as one hour to saw a single piece of hardwood, so the process was quite slow.
In America and some other countries large circular saws were redesigned to saw veneers. This produced a very uneven surface, as it was nearly impossible to control the accuracy of the large spinning saw blade. This method was replaced by slicing machines by 1850 in most cities.
In America and some other countries large circular saws were redesigned to saw veneers. This produced a very uneven surface, as it was nearly impossible to control the accuracy of the large spinning saw blade. This method was replaced by slicing machines by 1850 in most cities.
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The slicing of hardwood veneers was made possible by the introduction of steam power. Slicing veneers requires that the log be boiled for several days in a pressure cooker. This boiling changes the character of the wood, and minerals and chemicals are removed in the process. When the log is removed from the boiling water, it is quickly placed on a table and a large knife is forced through the wood, slicing off a layer of veneer. This veneer needs to be dried and often ends up warped or wrinkled. There is no waste, as the entire log is sliced into useable material, so that is a commercial advantage. From 1850 to around 1995 the industry standard thickness was 0.9mm (1/28"). Since 1995 most veneer produced is much thinner, from 0.6mm (1/42") to 0.3mm (1/60") and even thinner. These thin veneers are now sold as paper backed veneer, since they are impossible to work unless they are glued to a backing paper material. The veneer which is sliced has no tool marks at all on the glue surface.
Also, when the knife slices through the wood, it bends the veneer and breaks the fibers of the wood. This is one of the easiest features to use when examining the surface of furniture to determine if it is sliced or sawn. Sawn veneer will never show overall cracks, but will break in a single area where the ground wood shrinks and breaks. Sliced veneer will always start to break over the entire surface, as the wood moves due to shrinkage and environmental conditions. These breaks are very small and can easily be seen in a raking light.
It is impossible for any piece of furniture made before the Industrial Revolution to have an original surface made with sliced veneers. However, it is entirely possible for furniture made after the Industrial Revolution to have an original surface made with sawn veneers, such as high end recreations. I always use sawn veneers in making my furniture, as they are natural and stable, and represent the original material which I value highly for authenticity.
It is impossible for any piece of furniture made before the Industrial Revolution to have an original surface made with sliced veneers. However, it is entirely possible for furniture made after the Industrial Revolution to have an original surface made with sawn veneers, such as high end recreations. I always use sawn veneers in making my furniture, as they are natural and stable, and represent the original material which I value highly for authenticity.