Here's a listing of equilibrium moisture content to relative humidity ratios. July 11, 2000
Can you post the equation or table that gives the equilibrium moisture content (EMC) for differing relative humidities (RH)? i.e., 10 percent RH = x EMC, 20 percent RH= y EMC, etc.
0% RH = 0% EMC
19 to 25% RH = 5% EMC
25 to 32% RH = 6% EMC
32 to 39% RH = 7% EMC
39 to 46% RH = 8% EMC
46 to 52% RH = 9% EMC
57% RH = 10% EMC
65% RH = 12% EMC
74% RH = 14% EMC
80% RH = 16% EMC
91% RH = 21% EMC
The short form is:
0 = 0
30 = 6
50 = 9
65 = 12
80 = 16
Also, an approximate equation good out to about 80 percent RH is: EMC = 0.2 x RH
Gene Wengert, forum moderator
Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?
Have you reviewed the related Knowledge Base areas below?
KnowledgeBase: Primary Processing: Air Drying Lumber
KnowledgeBase: Primary Processing: Kiln Operation
KnowledgeBase: Wood Engineering: Wood Properties
KnowledgeBase: Knowledge Base
All rights reserved. No part of this publication may be reproduced in
any manner without permission of the Editor.
Review WOODWEB's Copyright Policy.
The editors, writers, and staff at WOODWEB try to promote safe practices.
What is safe for one woodworker under certain conditions may not be safe
for others in different circumstances. Readers should undertake the use
of materials and methods discussed at WOODWEB after considerate evaluation,
and at their own risk.
335 Bedell Road
Montrose, PA 18801
Copyright © 1996-2018 - WOODWEB ® Inc.