Thread: A method for pressing horn

Xnay on the "boiling" horn. I heated a slab yesterday, and took it to a little higher heat and longer period. When the micro bubbling stopped, I took it out to find that it had shrunk badly. Flat surface on top had a sunken lagoon in the middle, other flat had developed waviness, the edges were concave, and the whole piece wanted to revert to its curved memory. Not good. Seems that only slight treatment at lower temperatures and times has any value whatsoever.