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Tone wood -95 "Soil" project

posted 20 Jun 2014, 09:03 by Peter Grankulla   [ updated 22 Jun 2014, 00:23 ]
Selecting wood for my Soil project. These are the candidates for the top

The Plan
17:45 
Baking the wood for 45 min 150 °C, starting from cold oven. 
Then 30 min 180 °C (carefully monitoring what's going on)

Execution:

18:30
Extended to 60 min in 150 °C, as things started to happen just after 35 - 40 min - Fresh, nice smell of wood. 
I acts like newly cut green wood! Storage in the outside shed since 1995 seams to have had no seasoning effect on the wood.

19:00
A lot of resin and fumes is still coming out of the wood after 60 min in 150 °C so I continued another 20 min.

19:45
Continued to 2 hours in 150 °C until it stopped loosing weight, but i think there is still bound water in the wood
Rising to 180-190 °C

Monitoring so it wont burn and overcook...

20:30 Oven off
Leaving the wood in the oven to cool down with the oven

Total time 2 hours 45 min

 wedgestart g 2 h
150 °C
45 min
185 °C 
% loss 
 A304285280 7,9 % 
 B411382 380 7,5 % 
 C440 416 410 6,8 % 
 D372352 345 7,3 % 

I think I was too gentle to the wood? Or another possibility is that 
my MC% meter is picking up resin and gives false readings on this spruce. This was also what I was thinking when tuning/monitoring my ongoing project, because humidity in air and MC% in the top did not correlate. which it did on the back plate and other pieces of wood.

The MC meter showed 4 - 4,5 % after the cooking (9,5 % before)

Photos taken before and after:

https://picasaweb.google.com/107031328716467771098/Wood#6027041731898556834
https://picasaweb.google.com/107031328716467771098/Wood#6027648776963308722https://picasaweb.google.com/107031328716467771098/Wood#6027648833965351906

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