Baltic Birch Plywood for CNC & Laser Cutting
Void-free core, consistent density and — the part most suppliers never mention — the right adhesive. 3 and 6 mm B/BB are our steadiest lines because this is what they are bought for.
Ask for interior bond, not exterior
Every glue line in the panel is something the beam has to get through. Interior-grade (MR) adhesive cuts cleanly and leaves a pale, even edge. Exterior phenolic resin is a tougher, darker bond: it chars harder at each ply, smokes more and leaves a banded edge where the glue lines sit.
So for laser work the exterior panel is the wrong panel, even though it is the more expensive one — a case where paying more gets you a worse result. Our 5x5 line is interior-bonded throughout, which is why laser shops end up on that format. Exterior bond has its place — trailer floors and formwork — just not under a beam.
Void-free core
A void under the beam means a sudden change in what the laser is burning through: a missed cut on the pass, scorch where it lingers, and on a router a blown-out edge. All-birch construction has nothing hollow to hit.
Consistent density
Feed rate and power settings that worked on the first sheet still work on the fiftieth. That is the difference between a nested run you can leave alone and one you have to watch.
Even thickness
Laser focus and router Z depth are both set once. Thickness that wanders across a sheet shows up as inconsistent kerf and as parts that will not release from the tabs.
Patches and the beam
This is the one application where grade is a technical decision rather than a cosmetic one. A BB face carries sound wood patches — different grain direction, sometimes different density and moisture content from the surrounding veneer.
Engrave across one and it takes the beam differently: the depth changes, the tone changes, and the patch outline appears in the artwork. Nothing is wrong with the panel. It simply is not the grade for engraving.
Engraving or a visible cut face: B/BB. Through-cut parts that get painted, assembled or hidden: BB/BB is fine and costs less. The grades page sets out the rest of the ladder.
Matching the machine
- Laser beds
- Most bed sizes are well under a metre. A 5x5 panel breaks down into bed-sized blanks with less waste than a long sheet, and it is a two-hand lift rather than a two-person one.
- Router tables
- A 4x8 table wants a 4x8 sheet — nest the full bed, clamp once. Our exterior-bonded 4x8 suits routing, where the adhesive argument above does not apply.
- 3 mm
- Model making, inlay, layered signage, packaging prototypes, puzzle stock.
- 6 mm
- The volume laser thickness: boxes, fixtures, toys, display parts, jigs.
- 9 – 12 mm
- Structural cut parts, templates, fixture plates and machine jigs.
Consistency is the product
A cutting shop does not really buy plywood, it buys settings that keep working. That means the same mill and the same construction order after order — which is why we run a short, deep list instead of whatever happened to be cheap that month.
- Steadiest lines
- 3 mm and 6 mm B/BB in 5x5, interior bond, sanded two sides. Held at Houston and Baltimore.
- Emissions
- CARB Phase 2 and TSCA Title VI documentation on request — worth having on file if you cut in an enclosed shop or sell into California.
- Samples
- We can send offcuts so you can dial settings before committing to a load.
- Minimum
- Five packs, mixed across thicknesses and grades.