As far as I know, the cold ones were made with some kind of resin binder. Often, this was used to make double sided hones, fine and coarse sided. One layer was poured, allowed to set enough so it did not mix with the second pour, then the other layer was poured. If you examine the sides of some you can see that the lower layer contracted some, as the top layer, of another colour, seeps down.

I don't know for sure, but the hot baked ones probably had some clay type binder that set up in tbe oven, like a brick or tile would.

If memory serves, a young girl was put in charge of the process and had great success. She saw to the mixes and recorded it all in a book. It was said that she listed all the ingredients but kept part of the process committed to memory. She memorised times, temps or weights, possibly all three, just in case the book fell into wrong hands.

All this was recorded in a newspaper artic,e, either in her obituary or shortly after she died. Maddeningly, I cannot recall her name at the moment.

Randy would know. He either bought a lot of the old stock from the defunct works, or maybe a building. I think he either saw, or owns, that book too! He really is the man to asy...

Regards,
Neil