https://en.wikipedia.org/wiki/Plywood
Why Baltic Birch
 
1.Superior Screw Holding, because all layers are Baltic Birch veneers no softersecondary wood in use
2.Strenght and Stability, Baltic birch in particular won’t change much in width orlength, that’s why it’s great for jigs and fixtures that need to maintain accuracy overthe years.
3. Attractive, Baltic Birch is decorative and does not need to be painted. Its edgescan also be left visible.
4. Well suited to industry (processing) and laser cutting