How to check Moisture content Wood

Wood Water Content the Most Important Factor when we are Inspection furniture or Rattan

 Wood moisture content shows the amount of water contained in wood, expressed as a percent of dry weight and wood needs to be dried before working, until it reaches the water content that is appropriate to the place where the wood will be used. Wood moisture content is the amount of water contained in wood expressed in percent of the oven dry weight. Air-dried water content is the condition of wood in a dry state of air, which in this condition wood does not absorb or release water. Therefore, if it is used for building components, it can be said that the wood does not experience any development or shrinkage, even if it occurs very small, so that it does not damage the whole building element. Therefore, building wood must be known before its water content. Wood water content that is safe for use in buildings is the level of dry air water, for Indonesia area around 10% - 20%

 if the moisture content of the wood is high, the wood must be dried. Wood drying is the process of removing a portion of the water contained in a wood so that it reaches a certain or desired water content of the wood. Measurement of wood moisture content can be done both in the field and in the laboratory. Measurement of wood moisture content in the field is done by using a moisture content (MC) tool. On the tool will be read directly the amount of wood water content measured.

MOISTURE CONTENT CHECK

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MOISTURE CONTENT CHECK

Moisture content is used as a unit of measurement to determine the standard of wood dryness before processing. A good MC standard for furniture is between 8-12%, this does not mean the volume of water in wood is 12% of the total volume of wood.

Wood is composed of several natural materials. Then how is the size of 8%, 10% or 20% obtained?

The following is a simple method for knowing MC wood:

For example a piece of wood that is still wet (100 x 12 x 6 cm) weighs 5.40 kg (hardness of wood around 650 kg /m3). This weight will later be called the Wet Wood Weight.

Then the wood is dried in a special oven at 100 degrees Celsius for 48 hours (according to ASTM D2395-93 standards).

With this process water evaporation occurs and the wood weight becomes 4.68 kgs (for example). This weight is Dry Wood Weight.

We use the formula as below.

Wet Wood Weight = 5.40 kgs

Dry Wood Weight = 4.68 kgs

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