Cuped Drawer Bottoms

[SteveF]

1 of my newly created \ unfitted drawer bottoms has started to cup
the wood is old so I think is just sulking from being resawn \ glued up
it is thin enough 6mm that I can flatten with minimal finger pressure
as this will be going into a drawer slip should I be concerned?
I have just weighted it down for now but could clamp in cauls if a better option?
should I try to remedy this now or just hope the slips will do the work for me?

Steve

 

[custard]

Often times the cupping that results from deep ripping will correct itself over a few days, maybe not entirely but it frequently it is much improved a few days later as the moisture gradient between the outside face and the sawn face reduces with exposure to the air. The most important thing now is to allow free air circulation all around.

You can get away with a bit of cupping in a drawer bottom because, as you say, the slips help straighten it out. But too much cupping might interfere with the drawer stop (assuming that is you're using the traditional design of a drawer stop morticed in just behind the drawer front, as shown in this photo of a desk tidy)