On Wed, 1 Jul 2020 19:57:57 +0100 (GMT+01:00), Jimk
wrote:
[snip]

Chipboard has visible er chips....
MDF being just glued together dust, doesn't have any visible chips...

https://www.addicted2decorating.com/...ds/2014/01/mdf
-vs-particle-board.jpg

Its MDF. Sorry about the confusion.