EDIT: as Suez pointed out, Winton is student grade paint, so I'll be looking for an artist's burnt umber later today. How embarrassing.
Howdy folks, I recently bought a new tube of burnt umber made by Winton and noticed that it was much darker than the tube I have been using made by M. Graham.
Here's a comparison photo, the smaller dab on top is the M. Graham burnt umber and the larger one below it is the Winton burnt umber.
No wonder I've been having such a hard time mixing black!