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Evi Kusmiyati
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KUANTIFIKASI BEBERAPA PARAMETER KUALITAS GAHARU Bambang Wiyono; Neni Sumarliani; Umi Kulsum; Evi Kusmiyati
Jurnal Penelitian Hasil Hutan Vol 19, No 3 (2001): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5917.233 KB) | DOI: 10.20886/jphh.2001.19.3.137-146

Abstract

The draft of Indonesia National Standard for garro wood quality has a limitation where parameters used to determine the quality are still qualitative. This has caused a difficulty in assessing the quality of garro wood with different assessor. One effort to reduce this weakness is to quantify some parameters in this draft. In accordance with this, the objective of this research is to improve the draft of Indonesian National Standard for garro wood quality, so the assessment could be carried out quantitatively. The results indicated that fragrant dammar content could be quantified with resin content; weight could be quantified with specific gravity and color could be measured with chroma meter. Further analysis on the parameters showed that there were positive correlation between the quality and these examined parameters, where the increase in the garro wood quality correlated with the increase in the resin content, specific gravity and color value. This proposed draft which seems to have improvement in assessing the quality of garro wood objectively can therefore be suggested for its implementation in reducing human subjectivity.
SIFAT-SIFAT KOPAL MANILA DARI PROBOLINGGO, JAWA TIMUR Totok Waluyo; E S Sumadiwangsa; Pudji Hastuti; Evi Kusmiyati
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3833.305 KB) | DOI: 10.20886/jphh.2004.22.2.87-94

Abstract

Manila copal is originated from the exudate of Agathis sp. trees, which flows out through the tapping stimulation. Manila copal from Indonesia nowadays prevails nearly 80-percent share in the world market. One of the potential regions that produce manila copal in Indonesia is situated in Probolinggo, East Java.The manila copal as such reveals particular physical and chemical properties and then is categorized as superior (U1) and primary (P) qualities, exemplified consecutively: color magnitudes at JO YR 813 (light gray) and 2.5 YR 611 (reddish gray), impurities 9.7 percent and 23.3 percent, softening point 144°C and 149°C, ash content 0.2 percent and 9.2 percent, acid number 244 and 209, saponification number 309 and 245, and specific gravity 0.91 and 0.88, respectively.The qualities of Manila copal from Probolinggo is poor in qualities and could not meet Indonesian National Standard, particularly due to high impurities. 
SIFAT-SIFAT KOPAL MANILA DARI PROBOLINGGO, JAWA TIMUR Totok Waluyo; E S Sumadiwangsa; Pudji Hastuti; Evi Kusmiyati
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2004.22.2.87-94

Abstract

Manila copal is originated from the exudate of Agathis sp. trees, which flows out through the tapping stimulation. Manila copal from Indonesia nowadays prevails nearly 80-percent share in the world market. One of the potential regions that produce manila copal in Indonesia is situated in Probolinggo, East Java.The manila copal as such reveals particular physical and chemical properties and then is categorized as superior (U1) and primary (P) qualities, exemplified consecutively: color magnitudes at JO YR 813 (light gray) and 2.5 YR 611 (reddish gray), impurities 9.7 percent and 23.3 percent, softening point 144°C and 149°C, ash content 0.2 percent and 9.2 percent, acid number 244 and 209, saponification number 309 and 245, and specific gravity 0.91 and 0.88, respectively.The qualities of Manila copal from Probolinggo is poor in qualities and could not meet Indonesian National Standard, particularly due to high impurities. 
KUANTIFIKASI BEBERAPA PARAMETER KUALITAS GAHARU Bambang Wiyono; Neni Sumarliani; Umi Kulsum; Evi Kusmiyati
Jurnal Penelitian Hasil Hutan Vol 19, No 3 (2001): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2001.19.3.137-146

Abstract

The draft of Indonesia National Standard for garro wood quality has a limitation where parameters used to determine the quality are still qualitative. This has caused a difficulty in assessing the quality of garro wood with different assessor. One effort to reduce this weakness is to quantify some parameters in this draft. In accordance with this, the objective of this research is to improve the draft of Indonesian National Standard for garro wood quality, so the assessment could be carried out quantitatively. The results indicated that fragrant dammar content could be quantified with resin content; weight could be quantified with specific gravity and color could be measured with chroma meter. Further analysis on the parameters showed that there were positive correlation between the quality and these examined parameters, where the increase in the garro wood quality correlated with the increase in the resin content, specific gravity and color value. This proposed draft which seems to have improvement in assessing the quality of garro wood objectively can therefore be suggested for its implementation in reducing human subjectivity.
Co-Authors Bambang Wiyono E S Sumadiwangsa Neni Sumarliani Pudji Hastuti Totok Waluyo Umi Kulsum