Baltic Birch Plywood, 3 mm 1/8 x 12 x 20 Inch Craft Wood, Pack of 20 B/BB Grade Baltic Birch Sheets, Perfect for Laser, CNC Cutting and Wood Burning, by Woodpeckers

love using this wood .

Aa of this review I have purchased this item 16 times. I find it to be consistent in size and quality for most purchases. Sometimes the wood has come a little warped but not all boards in the order. Thinner boards like this are easier to flatten and one or two warped boards in an order here or there is acceptable. Compared to other companies I've purchased from this company has been the most consistent. Wil continue to purchase for laser cutting.

I have ordered the 12x20 1/8" sheets several times and it seems to be a toss up as to what I get quality wise. This time the sheets were nice uniform color free from surface patches. However a full third of the sheets have had internal filler which is nearly impervious to laser cutting leading to lost product and lost time for me. I suppose the full blame for this may lay with their suppliers, but the result is the same for me. Also, another thing which may be the result of temperature and humidity, is that all 20 sheets are not quite flat with an ever so slight bow. Lasers do not like bows. I'm trying to like Woodpeckers, but these aggravations are making it difficult.

Item is okay for laser work. There are issues now and then cutting completely which is frustrating but overall not a bad product.

I bought this for my research lab to used with our Glowforge laser cutter. The wood itself is very nice quality, pleasant color, good grain. It's a uniform thickness. It glues really well with wood glue and also holds paint well (we make prototypes for children, so we use Real Milk Paint non-toxic paint). It does require a quick round of sanding to be nice to the touch (we use 400 grain sandpaper), but then it becomes buttery smooth! The glowforge settings that work best for us are 195 speed / full power for cutting and 700 speed / 70 power for a nice dark etch. The reason I'm giving this three stars instead of 5 however is that many of the boards do not lie flat. They are warped right out of the box, sometimes to the degree that they are unusable (the head of the cutter hits the raised edge on one side). In other cases, the boards are still usable but the laser will fail to properly focus on some sections, so the cut doesn't go through the wood completely (we could use slower settings, but then other portions of the cut burn). This is partially addressed by dividing the cut into smaller sections, continually repositioning the board so that we're cutting closer to the center (where the focus occurs), and taping the wood down to the bed. But, that doesn't work for all designs (i.e., a large shape) and is generally a pain. I'd say that we've wasted roughly 1/3 of this wood on prints that had to be tossed due to board warping. So, overall, I haven't found a better alternative, but I hope this review helps people plan their prototyping budgets...