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Thread: Wood Chatoyance
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22nd May 2022, 11:20 PM #1Member
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Wood Chatoyance
Hi everyone
This is Paolo, from the PZC Chatometry – A standard system to measure wood chatoyance team.
I just wanted to share something about what we've been doing last years. Basically, we identified a reliable method to measure wood chatoyance, which is the way many wood species shift their color depending on the lighting direction.
This is a common example (all pictures show wood sanded to 1500-grit with no finish):
Eucalyptus – PZC Chatometry
Now the useful info: we put together a summary table based on thousands of samples, showing the typical chatoyance value of many wood species - here:
Summary Table – PZC Chatometry
Each wood can be clicked to reach its specific page, which shows some example of chatoyance on that wood.
I hope these data can actually help some of you
Paolo
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22nd May 2022 11:20 PM # ADSGoogle Adsense Advertisement
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25th May 2022, 08:17 PM #2
Many thanks Paolo.
Excellent work on Chatoyance measurements and the website on your results.
I mostly work (woodturn) with our Australian Blackwood (Acacia Melanoxoylon) and I know from experience the striking chatoyance it exhibits, so I looked that up and, yes, it is way up there at the top of your species list...
For those who are not familiar with the term... it comes from French, "œil de chat", cat's eye.Stay sharp and stay safe!
Neil
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26th May 2022, 03:01 AM #3Member
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Yes, indeed.
You can see an example in this page:
Acacia (misc) – PZC Chatometry
Unfortunately it is not cheap to purchase it from here. We would need at least 4 more samples (each coming from a different individual tree) to create a dedicated page and typical value for Acacia Melanoxylon.
Is it common in Australia?
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26th May 2022, 08:12 AM #4Senior Member
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Is it common in Australia?
Acacia melanoxylon
It also varies significantly in appearance across that geographic distribution.
What sample size pieces do you use?
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26th May 2022, 08:40 AM #5Member
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Thank you, very interesting. I heard there are some trees in Italy too, but still I couldn't find any pieces.
Anything that is at least 120x38x0.6mm (so even just a little piece of veneer) works for us, except for end-grain cutoffs. Even small firewood pieces can be turned into samples, provided a 120x38mm piece can fit inside. The tricky part is finding pieces from different individual trees (or from different sources).
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26th May 2022, 08:55 AM #6Senior Member
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Well, at that size and really negligible weight I'd be happy to send over a couple of pieces. If they get past customs at your end, all well and good if not, well you get that.
I have some melenoxylon from Cardwell in North Queensland. Where do I send it?
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26th May 2022, 09:35 AM #7.
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Wood will usually easily make it through customs as long as it doesn't have any bark or evidence of bugs. Most countries won't blink an eyeat wood but I was surprised at how much interest a canadian customs officer took in the pieces I had brought from Australia to Canada. They were inspected with a head magnifier and the inspector wanted to know all aennout them - turned out he was a woodie.
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26th May 2022, 03:32 PM #8
It's common here in South Australia, but it's not a big tree so supply isn't plentiful. The primary demand for it is as a cabinet timber and for turning.
The amount of chatoyance varies greatly as does the colour. Where I live in the Adelaide Hills it can be a deep rich colour like the sample on your website, with quite spectacular chatoyance, especially on large platters.
It also grows on the sandy soils in the south east of our state and that can be very pale.
IME, it is not obvious what the chatoyance will be like on any one piece until you have fine sanded it, which allows you to then see into any reflective cell structure.Stay sharp and stay safe!
Neil
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26th May 2022, 08:45 PM #9SENIOR MEMBER
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Acacia Celsa rivals Blackwood for Chatoyance
Flindersia Brayleyana too!
Log Dog
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26th May 2022, 08:52 PM #10Senior Member
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I'm happy to be corrected, but are you not talking about figure as opposed to chatoyance? I have some fairly run of the mill timbers with respect to figure in the grain, however, the chatoyance is stunning.
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26th May 2022, 09:02 PM #11SENIOR MEMBER
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26th May 2022, 09:52 PM #12GOLD MEMBER
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26th May 2022, 10:11 PM #13SENIOR MEMBER
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Fiddleback grain will often display a 3D appearance that changes when viewed at different angles
This is known as wood chatoyance
Log Dog
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26th May 2022, 10:15 PM #14
Tigers Eye
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26th May 2022, 10:23 PM #15SENIOR MEMBER
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