Juglans hindsii
Claro Walnut
California's figured walnut, and the wildest figure in the walnut family. Graft unions between English walnut and Hinds rootstock produce violet, gold and marbled patterns no other walnut can match.
- Coltivato fuori dall’Europa e importato tramite depositi europei.
- Gruppo botanico. Le conifere hanno foglie aghiformi, le latifoglie hanno foglie larghe.
- La famiglia botanica a cui appartiene la specie.
Avvisami quando arrivaSpecie di riferimento. Al momento non ci sono pezzi disponibili.
È adatto al tuo progetto?
Ideale per
- Heirloom dining tables
- Statement live-edge slabs
- Executive desks
- Gun stocks
- High-end cabinetry feature panels
Nessun pezzo di Claro Walnut nel lancio attuale
Specie simili disponibili
Al momento non è disponibile Claro Walnut. Queste specie sono adatte agli stessi progetti e hanno pezzi disponibili.
Ricevi avvisi per Claro Walnut
Ti inviamo un’email quando arrivano nuove tavole di Claro Walnut su KORENA. Ogni pezzo è unico, quindi conviene saperlo in anticipo.
Aspetto del legno
Che aspetto ha
Heartwood ranges from chocolate brown to purple-grey, often streaked with violet, gold and reddish tones. Sapwood is pale cream and usually contrasts sharply. Figure is the headline: fiddleback, marbled, feathered crotch, and dense burl clusters are common in graft-figured boards. Grain is typically straight in clear sections but wild around figure. Medium texture, satin natural lustre.
- Chocolate-brown to purple-grey heartwood
- Violet, gold and reddish streaking
- Pale cream sapwood with sharp contrast
- Fiddleback, marbled and crotch figure common
- Often heavily figured; prized for slabs.
Lavorazione
Come si lavora
Works well by hand and machine across sawing, planing, sanding, turning and carving. Glues and screws without drama. Wild grain around figure and burl tears out easily, back off feed rates, use sharp tooling, and finish-sand rather than hand-plane figured zones. Steam-bending is moderate at best; not the wood for tight curves. Note: published laboratory data for Claro is limited. No reliable MOR or MOE figures exist. For structural calculations, treat mechanical properties as broadly comparable to Black Walnut (Juglans nigra) and design with that proxy in mind.
Finitura
Takes oil, hardwax and lacquer cleanly. Oil finishes deepen the violet and gold tones and lift the chatoyance in fiddleback areas, worth a sample board before committing. Sand to 180–220 grit; going finer can close the surface and dull the figure. Open pores will show under high-build finishes, so grain-fill if a glass-flat surface is required.
Essiccazione
Dries at a moderate rate. Shrinkage is moderate (radial 4.0–4.7%, tangential 6.0–7.0%, volumetric 10.2–11.2%) with a tangential-to-radial ratio around 1.5, manageable, but figured and crotch sections can check or honeycomb if pushed. Slow kiln schedules and weighted stickering are standard for slab stock. Acclimatise indoors for several weeks before machining.
Quanto si muoverà?
Il legno si gonfia e si ritira in larghezza al variare dell’umidità dell’aria. Stima il movimento stagionale di un piano in Claro Walnut prima di progettare i fissaggi.
Movimento stagionale previsto
circa 7,4 mm
Fissa il piano con nottolini o staffe asolate, non con colla o viti serrate.
Modello di ritiro lineare: larghezza × (ritiro ÷ 28 % di saturazione delle fibre) × variazione stagionale dell’umidità. Usa un ritiro tangenziale del 6,5 % per Claro Walnut. È una stima di progetto, non una garanzia.
Quanto costa
Sicurezza e provenienza
- Coltivato fuori dall’Europa e importato tramite depositi europei.
- Stato nella Lista rossa IUCN: la valutazione globale dello stato di conservazione di questa specie.
Walnut dust contains juglone and is a known respiratory and skin sensitiser. Use extraction at the source, wear an FFP3 mask when sanding, and keep offcuts away from horses and dogs, juglone is toxic to both. Cured finished surfaces are food-contact safe.
Leggi la guida completaNote approfondite su marezzatura, variazione del colore, lavorazione e stabilità.
What Claro Walnut actually is#
Juglans hindsii is the northern California black walnut, and it produces the most dramatic figure in the walnut family. Its reputation rests on something that is not really a property of the species at all.
Claro is widely used as rootstock for English walnut, Juglans regia, in Californian orchards. Where the two species are grafted together, the grain at the union becomes violently disrupted, producing marbled patterning in violet, gold, orange and near black that neither species shows on its own.
Slabs cut through or near that graft union carry figure no other walnut can match, and they are priced accordingly. Plain Claro away from the union is a good walnut; graft figured Claro is a different proposition entirely.
The missing numbers#
Density at 640 kg per cubic metre and Janka hardness at 5,030 N are sourced and displayed on the species record. Modulus of rupture and elastic modulus are not shown, and that is deliberate.
Published laboratory data for Claro is limited, and no reliable MOR or MOE figures appear in the references KORENA cites. Borrowing values from Juglans nigra or Juglans regia and presenting them as Claro would produce a page that looks complete and specifies a wood that was never tested.
The practical consequence: do not use Claro where a calculated load path depends on assumed stiffness or bending strength. For a tabletop, a cabinet or a decorative slab, which is what this species is actually for, the missing figures do not constrain the decision.
Domande degli acquirenti
Domande degli acquirenti
What makes Claro Walnut figure so dramatic?
Much of it comes from graft unions. Claro is widely used as rootstock for English walnut orchards, and where the two species join, the grain becomes violently disrupted, producing marbled violet, gold and dark brown patterning that neither species shows alone. Slabs cut through that union carry figure no other walnut can match.
Why are no MOR or MOE figures listed?
Published laboratory data for Claro is limited and no reliable modulus of rupture or elastic modulus values exist in the references KORENA cites. Rather than borrow figures from Juglans nigra or regia and label them Claro, those fields are left empty. Density at 640 kg per cubic metre and Janka at 5,030 N are sourced and shown.
How does it compare with Black Walnut?
Claro is harder at 5,030 N against 4,490 N and considerably more variable in colour, running from pale gold through orange brown to near black, often within a single slab. Black walnut is more uniformly chocolate. Claro is bought for figure and colour variation; black walnut for consistency.
Is walnut dust a hazard?
Proprietà meccaniche
Dati tecnici
Valori di riferimento pubblicati. Quando le fonti non concordano, viene mostrato l’intervallo e il valore tipico è usato per le scale sopra.
| Densità (kg/m³)Massa per metro cubo con circa il 12 % di umidità. In genere, un legno più pesante è anche più duro e resistente. | 600–680 kg/m³valore tipico 640 kg/m³ |
|---|---|
| Durezza Janka (N)Forza necessaria per spingere una sfera d’acciaio fino a metà nel legno. È la misura standard della resistenza alle ammaccature. | 4,700–5,400 Nvalore tipico 5030 N |
| Ritiro radialeRitiro trasversale agli anelli di crescita, dal legno verde a quello anidro. È il movimento delle tavole a taglio radiale. | 4.0–4.7 % |
| Ritiro tangenzialeRitiro lungo gli anelli di crescita. È il movimento delle tavole a taglio tangenziale e della maggior parte delle tavole KORENA. | 6.0–7.0 % |
| Ritiro volumetricoVariazione totale del volume dal legno verde a quello anidro. Un valore più basso indica maggiore stabilità. | 10.2–11.2 % |
