On 2007-12-20 19:06:42 +0000, jon said:

I'm aware that a piece of wood (I forget its name) can be used to
prevent the break out as a router bit exists its cut from ruining the
work piece.

Sacrificial board or backer board are two of the names for this.



I have a "breakfast bar" that needs finishing using a
router. This has both edges finished as a curve making the use of a
sacrificial piece of wood difficult/impossible. Anyone know if routing a
worktop like this will cause problems or does chipboard behave
differently anyway?

Thanks,
Jon...

It does somewhat. The main thing is to take smallish cuts and then
for the last one no more than 1-2mm