In article ,
Owain wrote:
On 17 Jan, 08:04, (D.M.Chapman) wrote:

From my younger days I seem to remember that play chalk was a lot
'grittier' than teachers' chalk, as well as the sticks being thinner
and breaking more easily.


Dunno - SWMBO didn't complain and being a teacher she is used to school
chalk.

Seemed ok to me but I'm hardly and expert

Darren