I am building a kitchen hutch out of primavera, also known as "white
mahogany". The wood was purchased from an importer with a kiln, so it is
kiln dried. I milled the wood to 3/4", glued up a bunch of panels roughly
16 inches wide, composed of 3 boards 5 to 6 inches wide. All was well for a
couple of weeks. Then, when I started assembling the hutch, I discovered my
panels are cupped across the grain - roughly 3/16 of an inch across 16
inches. Not all of them are cupped, but perhaps half of 20 panels are. The
moisture content is 12 to 14%, which seems high. I can't tell any
significant difference between cupped and uncupped panels. My genuine
mahogany and some oak, also stored in the shop, both measure around 8%.
I've noticed that the cupped panels will "uncup" over a few days, then
re-cup.

Any ideas why this is happening? Are the panels useable? I'm thinking not.

Also, when you glue up panels, should they be stickered while stored? I've
always just stacked 'em up on some sawhorses or whatever is handy.

This is the first time I've worked with primavera, so maybe it's just not a
good species to use for furniture...

Thanks.

Bob