The Forestry Forum
General Forestry => Drying and Processing => Topic started by: bestillcody on August 19, 2020, 07:53:10 PM
I have been setting pitch in our local Los Angeles softwoods for a couple of years now with good results. Suddenly I have been having trouble. I have an Italian Stone Pine slab that I cannot get to stop running. Ran it at 160 for a week, pulled it out, still runny, put it in again for another week. Still having trouble with the pitch.
Anyone have any suggestions? I am at a loss.
What's the MC?
Did you give it a chance to cool off?
You need to go to 180 F. As mentioned, the pitch is only set for room temperatures, where any remaining pitch will be hard.
How do you get to that high of a temp (180) to set the pitch? I'm new to this, but have a lot of eastern white pine that I plan to saw into 1x and dry for interior work. Have started shopping for a kiln and see that the smaller dehumidification kilns top out at 120 degrees. Is that enough to "set" the pitch in pine?
The DH kilns have a max temp of 120°F for drying. On the Nyle kilns you can raise the temp as high as 160°F if the compressor is turned off.
Many small operations have a separate heating chamber for this.
Quote from: GeneWengert-WoodDoc on August 31, 2020, 11:55:00 PM
Many small operations have a separate heating chamber for this.
How long do I have to hold 4/4 EWP @ 180F?
I would say that 12 hours at 180 would be sufficient.