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PZC Chatometry

A standard system to measure wood chatoyance

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    • Africa
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    • Oceania
      • Agathis
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      • Australian Blackwood
      • Black Bean
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      • Eucalyptus, unspecified
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      • Oak, Tasmanian
      • Jarrah
      • Maple, Queensland
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      • Pine, Huon
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      • Spotted Gum
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    • South and Central America
      • Angelim
      • Araucaria
      • Aspidosperma
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      • Carapa
      • Cedar, Spanish
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      • Tatajuba
      • Timbauba
      • Tineo
      • Tulipwood (Brazilian)
      • Ziricote
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    • Epoxy resin
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      • Surface preparation on Curly Maple
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      • Finishing European Ash
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      • Finishing European Oak
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      • Finishing Indian Rosewood
      • Finishing Hackberry
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      • Finishing Snakewood
      • Finishing Purpleheart
      • Finishing Padouk
      • Finishing Mulberry
      • Finishing Niangon
      • Finishing Tasmanian Blackwood
    • Progressive grit sanding
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    • Raw Veneer vs fine sanded
    • Cleaning Black Walnut
    • Quartersawn vs Flatsawn
      • Quartersawn vs Flatsawn on London plane
      • Quartersawn vs Flatsawn on Red Oak
      • Quartersawn vs Flatsawn on European Beech
      • Quartersawn vs Flatsawn on Louro Faia
      • Quartersawn vs Flatsawn on White Mulberry
    • Runout Angle
    • Mud Curing on Osage Orange
    • No. 1 – Hawaiian Koa
    • High-res videos
    • Large GIFs [heavy pages…]
      • Large GIFs 1
      • Large GIFs 2
      • Large GIFs 3
      • Large GIFs 4
      • Large GIFs 5
      • Large GIFs 6
      • Large GIFs 7
      • Large GIFs 8
      • Large GIFs 9
      • Large GIFs 10
      • Large GIFs 11
      • Large GIFs 12
      • Australian species
    • Wood samples
    • Fresh-cut wood
    • From firewood to PZC results
    • Hunting for Tasmanian Blackwood
    • Included branches and Crotches
    • Chatoyance distribution within a tree
    • Tasmanian Blackwood – heartwood and sapwood
    • Stabilization
    • Microscope pictures
    • Out of the tablesaw
    • Chatoyance vs Fluorescence
    • Patch of Black Cherry trees
    • Spalting
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    • Thuya Burl
    • Dying Curly Maple
    • Ammonia fuming
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Epoxy resin

This page shows the effects of epoxy resin on different wood species.

42 samples (42 different species) were sanded to 1500-grit and then their chatoyance was measured.

Then each sample was coated with epoxy resin in two layers, the first aimed at filling pores and the second aimed at providing a clear coat, with 240-grit sanding in between.
Then each sample was subjected again to PZC measurement.

The chart shown here reports a quick summary of the results:

Effect of epoxy resin on chatoyance

On most species, epoxy has some beneficial effect (the average increase is +4 PZC points), while on some it has no effect or it even causes a deterioration.

The GIFS shown here compare the “before” and “after” conditions for two extreme cases: Spanish Cedar (PZC +16.5) and Bog Oak (PZC -3.8).

Cedar, Spanish – PZC = 20.8
Cedar, Spanish (Epoxy) – PZC = 37.2
Bog Oak – PZC = 13.7
Bog Oak (Epoxy) – PZC = 9.9

It must be remarked that Epoxy has a significant impact on brightness (-48% on average). It appears from chart below that this darkening effect causes dark wood species to lose their visible chatoyance, while lighter species are advantaged.

Effect of Epoxy on PZC vs initial brightness

Based on the technical chatoyance value “P” it can be concluded that Epoxy always increases technical chatoyance, but the effect on visible chatoyance is negative for dark woods.

GIFs below show the results on all other tested wood species:

Khaya (Epoxy) – PZC = 33.0
Oak, Sessile (Epoxy) – PZC = 15.2
Spruce, Fiemme (Ciresa Tonewood) (Epoxy) – PZC = 17.5
Walnut, Black (Epoxy) – PZC = 26.6
Larch, European (Epoxy) – PZC = 16.8
Walnut, European (Epoxy) – PZC = 16.8
Cherry, Sweet (Epoxy) – PZC = 25.8
Afrormosia (Epoxy) – PZC = 15.6
Ash, European (Epoxy) – PZC = 15.7
London Plane (Epoxy) – PZC = 16.5
Movingui (Epoxy) – PZC = 19.1
Aniegre (Epoxy) – PZC = 16.2
Red Gum (Epoxy) – PZC = 14.5
Limba, Black (Epoxy) – PZC = 24.4
Birch (Epoxy) – PZC = 28.0
Iroko (Epoxy) – PZC = 16.0
Ovangkol (Epoxy) – PZC = 31.3
Pear (Epoxy) – PZC = 10.5
Zebrawood (Epoxy) – PZC = 15.2
Teak (Epoxy) – PZC = 24.2
Olive (Epoxy) – PZC = 12.6
Okoume (Epoxy) – PZC = 39.7
Koa (Epoxy) – PZC = 25.2
Louro Faia (Epoxy) – PZC = 22.6
Black Locust (Epoxy) – PZC = 31.1
Beech, European (Epoxy) – PZC = 13.9
Maple, Hard (Epoxy) – PZC = 22.4
Granadillo (Epoxy) – PZC = 16.2
Rosewood, Indian (Epoxy) – PZC = 13.0
Ziricote (Epoxy) – PZC = 6.7
Purpleheart (Epoxy) – PZC = 16.4
Sapele (Epoxy) – PZC = 30.1
Wenge (Epoxy) – PZC = 10.0
Rosewood, Santos (Epoxy) – PZC = 9.6
Rosewood, Kingwood (Epoxy) – PZC = 16.0
Bubinga (Epoxy) – PZC = 20.1
Padouk (Epoxy) – PZC = 20.6
Walnut, African (Epoxy) – PZC = 17.3
Etimoe (Epoxy) – PZC = 23.0
Makore (Epoxy) – PZC = 22.2

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