Engineered wood veneer
corà prex
index
4
Corà
7
Manufacturing Process
9
Gluing tips
9
Polishing tips
5
Corà Prex
8
Characteristics
10 Varnishing tips
11 Patterns
13 Collections
14 - Design
15 - Elite
17 - Classic
19 - Natural
24 Corà Flex
26 Flex uses
20 Prex uses
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corà
corà prex
Engineered wood veneer
In English it is commonly referred to as ENGINEERED VENEER, in Italian we call it MULTILAMINAR VENEER or
RECOMPOSED VENEER, even if among experts in the
field it is known as PRE-COMPOSITE VENEER.
It is an innovative kind of veneer obtained through a sophisticated manufacturing technology which makes it possible
for wood used for decorative or lining purposes to display:
- colour and structure consistency through time.
- optimisation of working scraps, from small craftsmen production to larger industrial productions.
Company
Ethical/environmental issues are just as important for us:
with the development of pre-composite wood technology
it is now possible to produce industrialised veneers with
Corà has been available in the Italian and international markets since 1919.
Its role has been constantly evolving and today represents the largest Italian group in the production, import and distribution
of wood products. A multinational economical and productive reality that operates through the industrial manufacturing of
raw materials.
Thanks to its experience, the advanced technological and organisational structure, as well as a capillary distribution network,
Corà is today a synonym for a company that has been capable of evolving and renewing, reaching a leading position in Italy
similar colour and structure to natural veneers, without further damaging natural reserves of rare and protected wood
species.
All finished and semi-finished products created with Corà
Prex can be marked as real wood products.
and abroad through the generations.
Corà Veneer Division makes available to its clients a commercial and logistics structure based on a 2 millions sqm warehouse of engineered wood veneer ready for delivery, with more than 60 finishes carefully selected to satisfy the needs of the
market.
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Manufacturing process
TRUNK ROTARY PEELING
The process begins with the peeling of the trunk (Ayous
or Poplar) to obtain thin and homogeneous sheets. This is
possible by selecting the growing areas.
DYEING
The sheets are hence dipped in dyeing vats to obtain the
desired colour using organic, non metallic dyes applied in
an aqueous solution.
DRYING
The dyed sheets are dried in suitable driers, to eliminate
excess humidity.
MULTILAMINAR TRUNK COMPOSITION
Depending on the wood type one wishes to obtain, the dyed
sheets are glued according to precise fixed schemes.
PRESSING
The sheets are pressed using special moulds to obtain
flaming, straight grain or other particular shapes.
SQUARING
We have now obtained a multilaminar log. This procedure
leads to the conversion of the conical geometry of the original tree trunk to a regular parallelepiped, minimising working scraps.
VENEERING
Corà Prex is obtained with various thicknesses of
veneering.
TESTING
The process ends with a quality control through a light test,
in order to eliminate any faulty sheets.
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characteristics
Gluing tips
The amount of glue to be used per square meter depends on the type and thickness of the support, the structure of the
veneer (quartersawn or top cut), on the thickness of the veneer and the way its pressed.
Normally, we suggest using 100g/120g of glue per m2, at a pressure ranging from 2.5 to 5bar.
The temperature may range between 90 and 120°C. After pressing, the support must cool immediately to prevent burning
COMPOSITION
Generally speaking, Corà Prex consists of:
Wood (Ayous, Poplar or other): 90-92%
Resin/glue: 8%
Dye: max 2%
the surface or changing its colour.
It is possible to add organic or inorganic additives to the glue (hardener/catalyser), to prevent the glue from leaking through
the veneer pores.
We suggest using glues of similar colour to that of the veneer.
GLUING WITH VYNIL GLUES: TIPS
Humidity (contained): 8/12%. The humidity value may change depending on the environmental conditions experienced
Corà Prex may be glued to any wood fibre support using vinyl glues. Different supports should be checked and evaluated
during transport and stocking.
each time.
TECHNICAL SPECIFICATIONS
Due to the thermo-plastic characteristics of this type of glue, the amount of glue to be used should be carefully dosed according to the veneer, support and pressure, in order to prevent glue leakages through the veneer pores.
The most frequently used wood type is Ayous. It comes from the tropical forests of Africa, where logs are collected in compli-
We normally suggest using 80 g/m² to 100g/m² of glue at a pressure of 2.5-3.5 bar.
ance with the current laws. Poplar is also widely used, a plantation wood which, exclusively on request, may obtain the FSC
Temperature may range from 60 to 90°C.
certification.
HOT GLUING: TIPS
Corà Prex is real wood, it is possible that it may present slight changes in colour between productions, this should not be
Corà Prex may also be glued using hot glues such as polyolefin, EVA and polyurethane.
considered a defect.
AVAILABLE FORMATS
NOTE: Any other gluing methods should be carefully examined through preliminary tests. In any case, we recommend following the instructions supplied by the glue manufacturer.
Length: minimum 2150 mm to maximum 3400 mm;
Width: minimum 630 mm to maximum 1000 mm;
Thickness: from 0.4 to 3.0 mm.
Format tolerances
Length: +/- 10 mm
Width: +/- 10 mm
Polishing tips
Thickness: +/- 0.05 mm
LIGHT RESISTANCE
Corà Prex may suffer from prolonged exposure to direct sunlight or artificial light. A change in wood colour with time, should
therefore not be considered a defect.
To obtain optimal flatness of the panel we recommend sanding first with 100-grit sandpaper and then with 150-grit. The
The reference standard is UNI EN 15187, considering a Xenon light source for a period of exposition of approximately 20
roughness of the paper used during the last sanding stages should be selected according to the varnish one then wishes to
hours. The results are displayed as a “grayscale”.
apply. For example, with a water based varnish, the use of 120/220-grit sandpaper is recommend.
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patterns
Corà Prex patterns have been carefully selected to
reproduce as accurately as possible the various wood
types.
Varnishing tips
VARNISHING
“Acrylic” - solvent based
Lightfastness: High
Resistance to cold liquids and surface hardness: Excellent
NOTE: Suited for “Open Pore” effects in oak and ash tree wood as well as for light coloured woods such as birch, maple
“Polyurethane” - solvent based
Lightfastness: Not very high, requires UV filters and specific catalysers
Resistance to cold liquids and surface hardness: Good
NOTE: Excellent price to performance ratio
“Bi-component” Water based products
QUARTERCUT
SEMIQUARTERCUT
WIDE SEMIQUARTERCUT
HALF SEMIQUARTERCUT
CROWNCUT A
CROWNCUT B
Lightfastness: Good
Resistance to cold liquids and surface hardness: Excellent
NOTE: Good hiding and insulating power, especially suited for wood types such as oak or chestnut
“Single component” Water Based products
Lightfastness: Good
Resistance to cold liquids and surface hardness: Excellent
NOTE: Good hiding power and exceptional transparency
Using UV products (for large scale productions)
Resistance to cold liquids and surface hardness: Excellent
NOTE: These products may be used only in plants especially designed to allow polymerisation. Generally used in large scale
productions.
NOTE: Each varnishing method should be carefully tested in collaboration with the varnish manufacturer.
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collections
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CROWNCUT C
CROWNCUT D
HALFCROWNCUT
BURL
SHAKED
BOOKMATCH
VERTICAL
HORIZONTAL
PEELED
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design collection
Pearled Ash 507 P
Anthracite Black Ebony 073 Q
Shaked Ebony 069 S
Canadian Maple Crowncut A 88 C
American Cherry Crowncut
American Cherry Semiquartercut S
Black Birch 070 C
Iced Birch
Black Fire
Makassar Ebony Semiquartercut 68 DS
Makassar Ebony Semiquartercut 64 DS
Black Walnut KS 189
European Walnut Crowncut 7 DCM
Rosewood Crowncut NDC
Teak Semiquartercut 310 DS
Gray Silk
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elite collection
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Teak Semiquartercut 03 DS
White Teak Semiquartercut 311 DS
Golden Teak Quartercut 11 Q
Golden Teak Quartercut 15 Q
Golden Teak Quartercut 16 Q
Wengè Panga Semiquartercut 21 DS
Zebrawood Semiquartercut 018 DS
Zebrawood Semiquartercut 5 TS
White Zebrawood Semiquartercut DS
Bleached Oak Decapè
Semiquartercut 7 BDS
White Oak Semiquartercut 601 BDS
classic collection
Wengè Quartercut 3 Q
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Wengè Quartercut 8 Q
Wengè Quartercut 33 Q
Bleached Oak Decapè KS 701
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White Oak Semiqaurtercut B 01 S
White Oak Halfcrowncut
A 28 BDC/S
White Oak Crowncut
A 28 BDC
Aniegrè Quartercut 512 Q
Aniegrè Semiquartercut 185 S
Aniegrè Crowncut 185 C
Natural Caramel Bamboo Verticalcut
Natural Light Bamboo Horizontalcut
natural collection
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White Oak Crowncut
B 606 C
Brown Oak Decapè Crowncut
Silver Oak Decapè Crowncut
Natural Light Bamboo Verticalcut
Silver Oak Semiquartercut 3 S
Black Oak Semiquartercut 17 DS
Black Oak Decapè
Semiquartercut 31 DS
Natural Caramel Bamboo Horizontalcut
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prex uses
Corà Prex is mainly used in furniture, doors, panels and plated plywood, edges and in the naval industry.
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corà flex
Characteristics
Our attention to the needs of the client has lead us to further develop Corà Prex into an innovative product, unique in its kind and
even more sophisticated: Corà Flex.
Designed for clients which need to create particularly curved
semi-finished or finished products. This kind of material is extremely flexible:
a Corà Prex sheet glued, ground and polished, paired to a flexible
USES
paper support which prevents glue leaking after application. Corà
Suited for any curved surface, Boiserie, and Do it Yourself.
Flex is suited for all curved or shaped surfaces without causing
any breaks (normally observed with raw veneer panels not ground
SURFACE CHARACTERISTICS
nor provided with a support).
Ground and polished, sanded finish (220 grit).
Furthermore, it is easily rolled, a great advantage during stocking
and transport.
POLISHED SHEET SIZES
Length: from 2150 mm to 3400 mm (depending on the size of the veneer)
Width: 1.220 mm
Veneer sheet
CURVATURE RADIUS
Lengthwise (in the direction of the vein) the radius is approximately 3mm.
Cross section (against the vein) the radius is approximately 6 mm.
GLUING
- The use of vinyl glue or Bostik glue implies gluing on both sides to be joined. When using a membrane press, gluing can be either hot
or cold.
- In case of hot gluing using either a liquid or powder bi-component or single component ureic glue, we recommend a press temperature
around 70/75°C.
When using vinyl glues of any kind, we recommend a press temperature around 75/80°C.
N.B. The quality of the gluing may vary depending on the support and the machines used.
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flex uses
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Corà Domenico & Figli S.p.a.
36077 Altavilla Vicentina (VI) Loc. Tavernelle Viale Verona, 1
Tel. +39.0444.372711 Fax +39.0444.372771
[email protected] www.coralegnami.it
Veneer and Laminate Commercial Office
Tel. +39.0444.372711 Fax +39.0444.372885
[email protected]