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Thread: End Grain
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2nd December 2010, 10:55 AM #1
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End Grain
Hi,
Whenever I make a box with light coloured timber ie celery top pine I find that the exposing end grain (dovetails) turns out a bit grubby looking. Almost like glue has absorbed into the grain.
Should I perhaps seal the end grain before cutting the dovetails?
I can post a pic of a box if it will help.
Andy
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2nd December 2010, 11:04 AM #2
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The photos might help Andy, then we can make a more informed comment
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2nd December 2010, 11:12 AM #3
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Ok I'll post one tonight. I thought it may just be the celery top pine that it happens too, but I recently saw another box with the same looking end grain.
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2nd December 2010, 08:22 PM #4
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Consider the piece of timber as a bundle of drinking straws bonded together. Cut through the bundle accross the straws and you have endgrain, i.e. very hollow and porous fibres. Any body oils, dust, etc can penetrate the timber via the endgrain and cause discolouration, this is of course more evident in very light coloured timbers due to the greater contrast between the timber and the soiling.
Sealing the endgrain ASAP in the production process would tend to minimise the absorption of soiling materials for some time, but once you start to cut dovetails into the material, you will reopen the fibres behind the sealing layer allowing the entry foreign materials once again. The discolouration may be less severe, but contamination remains possible.
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