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So the density of plywood is mainly depended on the timer species of the core veneers . Usually 4 kinds of timber species are used to manufacture the cores of plywood ( film faced plywood ) , i.e. birch, hardwood, pine and poplar. The density of different plywood is listed as follows:


Usually, the density of combi core plywood is about 550~650 KG/CBM . However, suppliers usually name the plywood by using name of the species of face/back veneers . For example, Birch plywood can have a poplar core or combi core. In this case, the density of the birch plywood with poplar core will be about 580~620KG/CBM .


Basic plywood can be divided into three main categories: birch plywood (density approx. 680 kg/m3), mixed plywood (density approx. 620 kg/m3) and conifer plywoods (density 460-520 /m3). Birch plywood is used in applications requiring great strength or high quality, such as in special flooring and demanding interior linings.


The density of plywood is roughly 34.08 pounds per cubic foot. Because plywood is a flat material, it is generally measured in mass per area rather than mass per volume. Thicker plywood is heavier per each square foot.


Tropical plywood is superior to softwood plywood due to its density, strength, evenness of layers, and high quality. It is usually sold at a premium in many markets if manufactured with high standards. Tropical plywood is widely used in the UK, Japan, United States, Taiwan, Korea, Dubai, and other countries worldwide.


The birch veneer is actually accounts for a small portion of the plywood's density. The core layers are more important. The Purebond plywood that I see at my local home despot is probably from ...

wolstenholme.com/pdf/Baltic Birch Plywood Specifications.pdf

SPECIFICATIONS FOR ALL 5’x5’ BALTIC BIRCH PANELS . THICKNESS . 3mm . 6mm . 9mm . 10mm . 8mm . 12mm . 15mm . 25mm . 18mm . 28mm . 32mm . 40mm . CORE . BIRCH . PLY ...


Density Range. David Kriege and Richard Berry, in their book “The Dobsonian Telescope: A Practical Manual for Building Large Aperture Telescopes,” report that a sheet of Baltic birch HDP plywood that is 3/4 inch thick and has 13 plies has a density of .026 pounds per cubic inch.


All plywood runs the risk of warping, and the most common type of warp in plywood is bowing. Baltic birch is not immune, it’s still a wood product. However, Baltic birch has the odds stacked in its favor much better than other plywood, chiefly in 1/2″ and 3/4″ thickness.


Birch plywood from the best raw material. Metsä Wood's birch plywood products are produced of high-quality Finnish birch. Birch plywood is characterized by excellent strength and stiffness properties, and therefore it performs very well in applications demanding high strength and rigidity.