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EFFECT OF SUNLIGHT UPON COLOUR STABILITY OF ALDER AND CHERRY VENEERS
Emilia-Adela SALCA
Lecturer Eng. - Universitatea "Transilvania"
din Brasov - Facultatea de Industria Lemnului
Address: B-dul. Eroilor nr. 29, 500036 Brasov
Tel:0040 268 412921/int.191. Fax: 0040 268 415315.
E-mail: emilia.salca@unitbv.ro
Ivan CISMARU
Prof.dr.eng. - Universitatea "Transilvania"
din Brasov - Facultatea de Industria Lemnului
Address: B-dul. Eroilor nr. 29, 500036 Brasov
Tel:0040 268 412921/int.191. Fax: 0040 268 415315.
E-mail: icismaru@unitbv.ro
Adriana FOTIN
Lecturer Eng. - Universitatea "Transilvania"
din Brasov - Facultatea de Industria Lemnului
Address: B-dul. Eroilor nr. 29, 500036 Brasov
Tel:0040 268 412921/int.191. Fax: 0040 268 415315.
E-mail: adrianafotin@unitbv.ro
Abstract: The objective of the
present research work resided in establishing
the sunlight influence upon the colour stability
of black alder (Alnus glutinosa) and cherry (Prunus
avium) veneers, exposed under indoor conditions
for 1 and 3 months. The colour of veneer samples
was determined by using a Chroma Meter Konika
Minolta CR-410 device. The colour coordinates
L*, a* and b* were recorded before and after the
exposure under sunlight and darkness influence,
according to Standard ISO 7724-2. Within the framework
of this study, the colour change of the wooden
surfaces due to indoor exposure, both under sunlight
and darkness influence, was different than the
one of the reference groups. The sunlight mostly
influenced the colour changes, in the case of
cherry veneer especially, which recorded significant
colour differences of about 10.87 just right after
the first month of exposure. For alder veneer,
the maximum colour difference of about 8.67 hardly
appeared after 3 months of sunlight exposure.
Under darkness conditions, for none of the two
species under study were recorded significant
colour changes. These values ranged between 1-3
units, which represents the smallest colour difference
that can be discerned by the human eye.
Key words: colour stability, veneer,
alder, cherry.
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