PERUBAHAN WARNA DAN LAPISAN FINISHING LIMA JENIS KAYU AKIBAT PENCUACAAN

Krisdianto Krisdianto, Esti Rini Satiti, Achmad Supriadi

Sari


Peningkatan penggunaan produk kayu disebabkan karena warna alami kayu menimbulkan kesan hangat dan nyaman. Namun demikian, untuk penggunaan di luar ruangan secara alami kayu mengalami penurunan kualitas diantaranya perubahan warna dan pengurangan lapisan finishing di permukaan kayu. Penelitian ini bertujuan mempelajari perubahan warna dan ketahanan lapisan finishing setelah satu tahun terpampang di luar ruangan. Lima jenis kayu kurang dikenal dari Riau diberi pelapis bahan finishing transparan menggunakan bahan finishing akrilik, enamel, poliuretan, ultran lasur ultra violet (UV), dan ultran politur P-03 UV sebelum dipaparkan di luar ruangan selama satu tahun. Perbedaan warna kayu diukur berdasarkan sistem CIELab dan ketahanan lapisan film finishing dianalisis secara digital menggunakan perangkat lunak ImageJ. Hasil penelitian menunjukkan warna kayu berubah menjadi abu-abu pucat setelah terpapar cuaca di luar ruangan selama satu tahun. Perubahan warna sangat tinggi tercatat pada bulan pertama, dan sedang sampai kecil pada setiap bulan pengamatan selanjutnya. Permukaan kayu yang diberi bahan finishing lebih tahan terhadap pencuacaan daripada permukaan kayu alami tanpa bahan finishing. Bahan enamel (ET), lasur (LSR), dan P03 (PP) merupakan bahan finishing yang lebih baik dari bahan lainnya dalam hal perlindungan di luar ruangan. Hubungan antara penutupan bahan finishing dengan perubahan warna menunjukkan korelasi sedang, yaitu semakin luntur bahan finishing di permukaan kayu, maka perubahan warna semakin besar.


Kata Kunci


Luar ruangan; lima jenis kayu; warna; CIELab; lapisan finishing

Teks Lengkap:

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Referensi


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DOI: https://doi.org/10.20886/jphh.2018.36.3.205-218

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