Crystals on cedar

Crystals on cedar

Post by John oles » Tue, 13 Jan 1998 04:00:00



I turned two cedar boxes and left the lids on for several weeks.  When I
removed the lids the inside of the boxes were covered with a large number
of very fine, needle-like crystals with a diameter much finer than hair.
The length of the needles was about 1/2 inch.  Has anyone observed this
effect and any ideas on the type of coumpound/chemistry causing this?

Regards

John Olesen

 
 
 

Crystals on cedar

Post by John M. Obertli » Wed, 14 Jan 1998 04:00:00


The crystals that your seeing are most likely on red cedar. The red cedar
closet liner that you buy in the store has the crystals on it and I saw red
cedar on my mill and it also has the crystals on it. I guess thats what
makes it aeromatic cedar.

Mike



Quote:
> I turned two cedar boxes and left the lids on for several weeks.  When I
> removed the lids the inside of the boxes were covered with a large number
> of very fine, needle-like crystals with a diameter much finer than hair.
> The length of the needles was about 1/2 inch.  Has anyone observed this
> effect and any ideas on the type of coumpound/chemistry causing this?

> Regards

> John Olesen


 
 
 

Crystals on cedar

Post by Martin H. Eastbur » Wed, 14 Jan 1998 04:00:00


Sounds like slow evap around open pores.
They aren't oils - but 'salt cedar' comes to mind.
I suspect the tree absorbed real salt from the ground
and evap'd into the crystals, or another chemical (a salt family member)
is it.  e.g. Magnesium sulfate.....
Martin
--
NRA LOH, NRA Life
NRA Second Amendment Task Force Charter Founder

 
 
 

Crystals on cedar

Post by mroegne » Fri, 16 Jan 1998 04:00:00


I'm not exactly sure of the composition of the crystals, but I can
attest that they are perfectly normal when turning aromatic cedar
(actually a juniper).  They appear to be an extrusion caused by sap
leaving the piece and outgassing on the surface - I've seen them up to
an inch long on larger pieces.  A word of warning here - if you like
to turn green wood and microwave dry it, DO NOT attempt to do this
with aromatic cedar.  The gases that are produced by heating the cedar
are highly flammable, and I had a piece actually ignite and blow the
door open once several years ago.  Also, if you allow the sap that
seeps out to overheat and burn, you'll add a "permanent" scent to your
microwave and shop.

                                        Michael

On Tue, 13 Jan 1998 22:01:46 -0800, "Martin H. Eastburn"

Quote:

>Sounds like slow evap around open pores.
>They aren't oils - but 'salt cedar' comes to mind.
>I suspect the tree absorbed real salt from the ground
>and evap'd into the crystals, or another chemical (a salt family member)
>is it.  e.g. Magnesium sulfate.....
>Martin

 
 
 

Crystals on cedar

Post by Martin H. Eastbur » Fri, 16 Jan 1998 04:00:00


How about one of you try to describe the crystals -
e.g. - color - shape - is it hex....
approx size - maybe someone here can ID them.
I might be able to if they are some common mineral..

Is it transparent/frosted.....  Might be good to really know.
Martin
--
NRA LOH, NRA Life
NRA Second Amendment Task Force Charter Founder