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All Journal JURNAL HUTAN LESTARI Transmisi Jurnal Inovasi Pendidikan Kimia Jurnal Dinamika Pendidikan Journal of Mechanical Engineering Science and Technology JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Serambi Engineering Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Barometer Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Jurnal Inovasi Teknik Kimia International Journal Of Science, Technology & Management (IJSTM) JiTEKH (Jurnal Ilmiah Teknologi Harapan) Jurnal Teknologi Kimia Unimal KREATIF Jurnal Pengabdian Masyarakat Sains dan Teknologi
Vera Pangni Fahriani
Universitas Singaperbangsa Karawang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Optimasi Umur Pakai dan Efektivitas Boiler Akibat Korosi Menggunakan Algoritma Particle Swarm Reza Setiawan; Vera Pangni Fahriani; Sugeng Riyadi
Jurnal Serambi Engineering Vol 6, No 1: Januari 2021
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v6i1.2664

Abstract

One of the causes of boiler pipe breakage is corrosion. The prediction of the lifetime of the tube and superheater effectiveness on the boiler shall be calculated to determine and predict the failure time. The prediction of the lifetime of the tube is a prediction of the time of the failure of the superheater tube in the boiler so that the return can be performed.  The effectiveness of the superheater in the boiler is a comparison of the heat transfer rate of the overheated tubes  inside the boiler. The research method was research and development, a computational program using an optimization process.  The variables used in the study were steam input temperature, metal tube temperature, steam outlet temperature, natural gas input temperature, natural gas mass flow rate,  vapour mass flow rate, and natural gas outlet temperature. This study takes a case study of the superheater boiler from the company. The results of calculation of the life expectancy of the operating conditions  shall be 11 years when the boiler data sheet is used and 14 years  for using the actual boiler data. Superheater effectiveness in boilers with 56% is a data sheet on boilers and 56% of the actual data. Optimization of the particle swarm algorithm predicted a  29 year  lifespan. The effectiveness of the superheater in the boiler is 86%.
Kemampuan Induktansi pada Material Inti Logam Induktor Besi Cor ASTM A48, Nichrome dan Monel Alloy 400 Terhadap Variasi Input Listrik dan Lilitan Vera Pangni Fahriani; Reza Setiawan; Suciani Rahma Pertiwi
Jurnal Serambi Engineering Vol 6, No 1: Januari 2021
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v6i1.2652

Abstract

Inductor with a metal core is a component which  is almost always present in the daily  electronic device known to us . To further prove the potential  of the proposed new metalcore material, it is necessary to test the voltage variation, winding, and frequency in the inductor with the newly proposed metallic core material. The research method uses experimental methods. Three basic metal materials were used in the experiment, those are Cast Iron ASTM A48 (C 3.4%, Mn 0.5%, Si 1.8%,), Nicromine (Ni 80%, Cr 20%), Monel Alloy 400 (Ni 63%, Cu 31.7%, C 0.3%, Fe 2.5%, Si 0.5%, Mn 2%, S 0.024%). Experimental tests on these new types of metal were also carried out under various stress, winding, and working frequency conditions. The voltage variation selected is 4.5 V - 24 V,  the winding variations and frequencies selected are 150 to  1000 turns and 50 Hz. The  greatest inductance was obtained from ASTM A48, Fe, Monel Alloy 400, Nikromic, and without metallic core on the specified indicator variables. As the voltage increases and the number of turns increases,  the inductance value increases.
Shell and Tube Heat Exchanger Fouling Factor via Heat Transfer Research Inc (HTRI) Software Ismi Ari Fitria; Dessy Agustina Sari; Vera Pangni Fahriani; Mohammad Djaeni
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 7, No 2 (2022): EDISI SEPTEMBER 2022
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v7i2.4030

Abstract

One of the factories for manufacturing Carboxymethyl Cellulose (CMC) uses a shell and tube-type heat exchanger as a condenser. The shell and tube (HE) heat exchanger consists of small diameter tubes arranged in a cylindrical shell. In the tube and shell sections, hot (ethanol) and cold (water) fluids will flow so that heat transfer occurs directly. The use of heat exchangers regularly will reduce the performance of the tool. Due to the increasing fouling layer inside the HE, the device will work harder, and the heat process could be more optimal. It is necessary to analyze the performance of the heat exchanger using the parameter value of the fouling factor (Rd). The fouling factor can be calculated using the manual calculation method (via the Kern method) and the HTRI program. The involvement of the mathematical equation in the first method will be configured for the calculation results through process simulation in the HTRI software. Both ways are used for calibration between manual calculations and the HTRI software for the Rd values obtained. The fouling factor can be calculated using the manual method and HTRI software. The two methods used for calibration are manual calculations with HTRI software. The results from this analysis give a decrease in tool performance with a fouling factor of 0,01 Btu/(h.ft2.℉). ABSTRAKSalah satu pabrik pembuatan Carboxymethyl Cellulose (CMC) menggunakan heat exchanger tipe shell and tube sebagai kondensor. Heat exchanger (HE) shell and tube terdiri dari sekumpulan tube berdiameter kecil yang disusun di dalam shell berbentuk silindris. Pada bagian tube dan shell akan dialirkan fluida panas (etanol) dan dingin (air) agar terjadi proses perpindahan panas secara tidak langsung. Penggunaan heat exchanger secara berkala akan mengurangi kinerja alat. Hal tersebut disebabkan oleh adanya lapisan fouling yang terus meningkat di bagian dalam HE sehingga alat akan bekerja lebih berat dan proses perpindahan panas tidak maksimal. Untuk mengatasi fenomena tersebut maka perlu dilakukan analisis kinerja heat exchanger menggunakan parameter nilai fouling factor (Rd). Fouling factor dapat dihitung menggunakan metode perhitungan manual (melalui metode Kern) dan penggunaan program HTRI. Keterlibatan persamaan matematis pada metode pertama akan dikonfigurasi hasil perhitungannya melalui simulasi proses pada software HTRI Kedua metode digunakan untuk kalibrasi antara perhitungan manual dengan software HTRI atas nilai Rd yang didapatkan. Hasil analisis perhitungan dengan kedua metode tersebut menghasilkan penurunan kinerja alat dengan nilai fouling factor sebesar 0,011 Btu/(jam.ft2.℉).  
Thermal Design Optimization of Shell-and-Tube Heat Exchanger Liquid to Liquid to Minimize Cost using Combination Bell-Delaware Method and Genetic Algorithm Setiawan, Reza; Hrdlička, František; Darmanto, Prihadi Setyo; Fahriani, Vera Pangni; Pertiwi, Suciani Rahma
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 4, No 1 (2020)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v4i12020p014

Abstract

Shell-and-tube heat exchanger is designed to satisfy certain requirements such as heat transfer capability, allowable pressure drop and limitation of size. Beside such requirements, it is important to consider  economical point of view to get the lowest total cost. In this study, computational program and optimization for thermal design shell-and-tube heat exchanger were built for liquid to liquid with no phase change process in four variables design parameters using Bell-Delaware method. The design variables were tube size, tube length, baffle cut to shell inside diameter ratio and central baffle spacing to shell inside diameter ratio. The genetic algorithm was used as optimization method to get lower solution for economical point of view. The results from two study cases show that the genetic algorithm got lower total cost from the original design. The total cost decreased 28.83% in first study case and 52.56% in second study case from the original design.
Penerapan Teknologi Nanofluida pada Hand washer dalam Upaya Pencegahan Penyebaran Covid-19 di Desa Tanjung Bungin Kab. Karawang Vera Pangni Fahriani; Sutrisno Sutrisno; Apid Hapid Maksum; Marchanda Rahmawati Martin; Reza Setiawan
KREATIF: Jurnal Pengabdian Masyarakat Sains dan Teknologi Vol 2 No 1 (2024): Kreatif
Publisher : Fakultas Teknik, Universitas Singaperbangsa Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/kreatif.v2i1.11160

Abstract

This Community Service Program (PKM) aims to assist and carry out outreach as an effort to prevent the spread of Covid-19 in a standard and effective manner, and to help cultivate a culture of mutual cooperation and Village independence in making nanofluid droplet hand washer fluid technology. The partner for this service activity is Tanjung Bungin Village, Karawang. The village's location close to Tanjungpakis Beach means that many people pass by and stop by, but there is still low awareness of the Covid-19 pandemic and there are no adequate public facilities for nanofluid droplet hand washer technology and there has not yet been a good awareness of cultivating mutual cooperation and village independence in making nanofluid droplet hand washer technology is a problem. The solution to this problem is to apply nanofluid technology to hand washers. The PKM implementation method is carried out from the preparation stage to the use of hand washer tools and materials directly in public facilities as well as evaluation by looking at and listening to suggestions for tools and materials for improvement. The results of this PKM were in the form of natural hand washer fluid and nanofluid hand washer tools as well as a positive response to socialization activities and handover of hand washer tools.
Penerapan Teknologi Droplet Nanofluida Pada Alat Penyemprot Disinfektan dalam Upaya Pencegahan Penyebaran Covid-19 Pada Fasilitas Umum di Kec. Pakisjaya Kab. Karawang Reza Setiawan; Aripin Aripin; Agustian Suseno; Vera Pangni Fahriani
KREATIF: Jurnal Pengabdian Masyarakat Sains dan Teknologi Vol 2 No 1 (2024): Kreatif
Publisher : Fakultas Teknik, Universitas Singaperbangsa Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/kreatif.v2i1.11161

Abstract

PkM Tanjung Bungin Village, Karawang Regency is inhabited by 891 families or around 2,612 residents. Crowded places such as entertainment venues, sales of fishermen's catches and traditional markets are always busy with people from villages, sub-districts and even Bekasi Regency. Frequent interactions between the people of Tanjung Bungin Village and people outside the village area because of the necessities of life that need to be met have resulted in a large potential for the spread of Covid-19. There needs to be a program that can provide the right solution to prevent the spread of Covid-19. Application of Nanofluid Droplet Technology in Disinfectant Sprayers in Efforts to Prevent the Spread of Covid-19 in Public Facilities in Kec. Pakisjaya District. Karawang independently among the community is one of the appropriate and effective solutions. The disinfectant sprayer made is based on the theory underlying research proposed on microsprayer technology on disinfectant sprayers made and used in PkM efforts to prevent the spread of Covid-19 in public facilities in Pakisjaya District, Kab. Karawang. The method that had been used was by mentoring, training, making and implementing Disinfectant Spray Equipment. The output of this community service activity was the creation and implementation of a nanofluid droplet technology disinfectant sprayer at public facilities in Tanjungbungin Village, Pakisjaya District, Karawang Regency.
Sosialisasi dan Penerapan Teknologi Speed Bump Berbahan Dasar Plastik untuk Lalu Lintas Jalan Iwan Nugraha Gusniar; Reza Setiawan; Milliyantri Elvandari; Vera Pangni Fahriani; Rikky Rifaldy
KREATIF: Jurnal Pengabdian Masyarakat Sains dan Teknologi Vol 2 No 1 (2024): Kreatif
Publisher : Fakultas Teknik, Universitas Singaperbangsa Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/kreatif.v2i1.11162

Abstract

PkM Tanjung Bungin Village, Karawang Regency is inhabited by 891 families or around 2,612 residents. Crowded places such as entertainment venues, sales of fishermen's catches and traditional markets are always busy with people from villages, sub-districts and even Bekasi Regency. Frequent interaction between the people of Tanjungbungin Village and people outside the village area because of the necessities of life that need to be met causes a large potential for traffic accidents on the connecting road. Apart from that, the unavailability of speed bumps around roads where there are potential accidents and their lack of self-sufficiency means that speed bumps increase the risk of high traffic accidents. There needs to be a program that can provide the right solution to immediately reduce the potential for traffic accidents. Making speed bump technology made from plastic independently among the community will be the right and effective solution. The plastic speed bump technology that had been made is based on research products and uses the same manufacturing method as that carried out in the research. The method that had been implemented is integration between PkM and student KKN activity programs by means of mentoring, training, and making speed bump technology made from plastic. The output of this community service activity was the creation and implementation of a speed bump made from plastic in Tanjungbungin Village, Pakisjaya District, Karawang Regency.
PEMANFAATAN DAUN JATI MUDA DAN SABUT KELAPA SEBAGAI PEWARNA ALAMI KAIN KATUN DENGAN FIKSATOR AIR JERUK NIPIS Anwari, Luluatun; Fahriani, Vera Pangni; Wahyuningtyas, Aulia
JURNAL HUTAN LESTARI Vol 12, No 2 (2024): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v12i2.76263

Abstract

Indonesia has the variety of plants that have the potential to provide natural dyes to textiles. One of them is the young leaves of teak tress (Tectona grandis) which contain anthocyanin dye. Coconut fiber waste is also used as a natural dye because it contains tanin dye. Many studies have been carried out on young teak leaves and coconut fiber in fabric dyeing. This research creates a new idea that uses both as natural dyes by soaking coconut fiber in young teak leaf extract. Extraction of young teak leaves is carried out by boiling with a vlot of 1 kg of material / 10 L of solvent at a temperature of 100 °C for 30 minutes. Then the young teak leaf extract is added with coconut fiber and left for 24 hours and 48 hours, until a natural dye solution is obtained. The fabric is dipped in the dye for 5 x 20 minutes. Next, the fabric is dried by air-drying and fixation is carried out with lime juice to bind the dye that has been absorbed into the fabric fibers. The results of this research show that soaking coconut fiber for 24 hours and 48 hours in young teak leaf extract can provide a brighter fabric color intensity, as well as adding lime juice fixator. This research shows that soaking coconut fiber in young teak leaf extract can provide a brighter fabric color intensity, likewise with lime juice fixator. In terms of fabric colour fastness to soap washing, the lime juice fixator gave a good average score (4), one level higher that without fixation which got a fairly good average score (3-4).Keywords: coconut fiber, lime juice fixator, natural dye, young teak leaves.AbstrakIndonesia memiliki ragam tumbuhan yang berpotensi memberikan zat warna alami pada tekstil. Salah satunya adalah daun muda dari pohon jati yang mengandung zat warna antosianin. Limbah sabut kelapa juga dimanfaatkan sebagai pewarna alami karena mengandung zat warna tanin. Daun jati muda dan sabut kelapa sudah banyak dilakukan penelitian dalam pewarnaan kain. Penelitian ini membuat gagasan baru yang memanfaatkan keduanya sebagai pewarna alami dengan cara perendaman sabut kelapa dalam ekstrak daun jati muda. Ekstraksi daun jati muda dilakukan dengan cara perebusan dengan plot 1 kg bahan / 10 L pelarut pada suhu 100 °C selama 30 menit. Kemudian ekstrak daun jati muda ditambahkan dengan sabut kelapa dan didiamkan selama 24 jam dan 48 jam, hingga diperoleh larutan pewarna alami. Kain dicelupkan ke dalam pewarna selama 5 x 20 menit. Selanjutnya kain dikeringkan dengan cara diangin-anginkan dan dilakukan fiksasi dengan air jeruk nipis untuk mengikat zat warna yang telah terserap dalam serat kain. Hasil penelitian menunjukkan bahwa perendaman sabut kelapa selama 24 jam dan 48 jam dalam ekstrak daun jati muda dapat memberikan intensitas warna kain yang semakin terang, begitu juga dengan penambahan fiksator air jeruk nipis. Dalam segi tahan luntur warna kain terhadap pencucian sabun, fiksator air jeruk nipis memberikan nilai rata-rata baik (4), satu tingkat lebih tinggi daripada tanpa fiksasi yang memperoleh nilai rata-rata cukup baik (3-4).Kata kunci: sabut kelapa, fiksator air jeruk nipis, pewarna alami, daun jati muda, 
THE EFFECT OF TEMPERATURE AND ROCK SUGAR PERCENTAGE ON POLYPHENOL CONTENT IN PROCESSED RED GINGER (ZINGIBER OFFICINALE VAR. RUBRUM) PRODUCTS Fadzrin, Al Ghifary Marendra; Sari, Dessy Agustina; Fahriani, Vera Pangni
Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Vol. 6 No. 2 (2024): Penelitian Kimia 2024
Publisher : Program Studi Kimia, Fakultas MIPA, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/jc.v6i2.3661

Abstract

The aim of this study was to determine the effect of evaporation-crystallization operating conditions on the polyphenolic content of red ginger extract (Zingiber officinale var. Rubrum), a medicinal plant known for its multiple health benefits in traditional Asian medicine. Polyphenolic compounds found in red ginger, such as gingerol and shogaol, are potent antioxidants with a variety of therapeutic effects, including antiviral, anticancer, and anti-inflammatory properties. The extraction and crystallization processes are essential to maximizing the bioavailability of these compounds. This study investigated the variation of crystalliser (rock sugar) content and temperature during both processes on the polyphenol content of the samples. In this study, the evaporation-crystallization method was applied to red ginger raw materials to determine the optimal conditions for maintaining polyphenol content. The results showed that red ginger extract before treatment (sample P) had the highest polyphenol content, recorded at about 3150 mg gallic acid/g. Sample SB treated at 80°C with 100% sugar content had a significant polyphenol content of about 2300 mg gallic acid/g. In contrast, increasing the treatment temperature by 10°C (SD sample) resulted in the lowest content measured, indicating a temperature-sensitive condition in the maintenance of polyphenols during the process. Further analysis showed that sugar content had a significant effect on polyphenol stability. This finding contradicts previous studies suggesting that sugar can cause polyphenol degradation. This study suggested that the presence of crystallizing agents may affect the Folin-Ciocalteu reagent used for polyphenol content analysis, leading to higher readings. In addition, this study investigated the polyphenol content in liquid-phase samples (after brewing and dissolution in hot water). The results showed a decrease compared to the solid-phase samples. The decrease in polyphenol content during steeping is consistent with the idea that hot water immersion can dissolve and thus reduce phenolic content. This study highlights the importance of extraction-crystallization parameters on the quality of red ginger extracts and suggests that control of temperature and sugar concentration can significantly improve polyphenol stability, thereby optimizing the therapeutic potential of red ginger products. Comparisons with commercial products highlight the superior polyphenol content of the study samples, supporting tailored extraction methods to maximize health benefits. Penelitian ini bertujuan untuk mengetahui pengaruh kondisi operasi evaporasi-kristalisasi terhadap kandungan polifenol pada ekstrak jahe merah (Zingiber officinale var. Rubrum), sebuah tanaman obat yang terkenal dalam pengobatan tradisional Asia karena beragam manfaat kesehatannya. Senyawa polifenolik yang terdapat dalam jahe merah, seperti gingerol dan shogaol, adalah antioksidan kuat yang menawarkan berbagai efek terapeutik, termasuk antiviral, antikanker, dan antiinflamasi. Proses ekstraksi dan kristalisasi sangat penting untuk memaksimalkan bioavailabilitas senyawa ini. Penelitian ini mengkaji tentang variasi persentase agen kristalisasi (gula batu) dan suhu selama kedua proses tersebut terhadap kandungan polifenol sampel. Penelitian ini menggunakan metode evaporasi-kristalisasi pada bahan baku jahe merah untuk menentukan kondisi optimal dalam mempertahakan kadar polifenolnya. Hasil menunjukkan bahwa ekstrak jahe merah sebelum perlakuan (sampel P) memiliki kandungan polifenol tertinggi, tercatat sekitar 3150 mg asam galat/g. Sampel SB yang diperlakukan dengan kandungan gula 100% pada 80°C memiliki kandungan polifenol signifikan sekitar 2300 mg asam galat/g. Sebaliknya, peningkatan suhu perlakuan sebesar 10°C (sampel SD) menghasilkan kandungan terendah yang diukur, menunjukkan kondisi yang sensitif terhadap suhu dalam menjaga polifenol selama proses berlangsung. Analisis lebih lanjut menunjukkan bahwa kandungan gula berdampak signifikan terhadap stabilitas polifenol. Sebuah temuan yang bertentangan dengan studi sebelumnya yang menyarankan gula dapat menyebabkan degradasi polifenol. Penelitian ini mengemukakan bahwa keberadaan agen kristalisasi dapat mempengaruhi reagen Folin-Ciocalteu yang digunakan untuk analisis kandungan polifenol, menyebabkan nilai yang diukur lebih tinggi. Selain itu, penelitian ini mengeksplorasi kandungan polifenol dalam sampel fase cair (pasca penyeduhan – pelarutan ke dalam air panas). Hasilnya menunjukkan penurunan dibandingkan dengan sampel fase padat. Penurunan tingkat polifenol selama penyeduhan sesuai dengan gagasan bahwa perendaman air panas dapat melarutkan dan dengan demikian mengurangi kandungan fenolik. Penelitian ini menekankan pentingnya parameter ekstraksi-kristalisasi terhadap kualitas ekstrak jahe merah dan menyarankan bahwa kontrol suhu dan konsentrasi gula dapat meningkatkan stabilitas polifenol secara signifikan, sehingga mengoptimalkan potensi terapeutik produk jahe merah. Perbandingan dengan produk komersial menonjolkan kandungan polifenol yang superior dari sampel penelitian, mendukung metode ekstraksi yang disesuaikan untuk memaksimalkan manfaat kesehatan.
PENGARUH WAKTU PERENDAMAN SABUT KELAPA DALAM EKSTRAK PEWARNA ALAMI KAYU SECANG (CAESALPINA SAPPAN LINN) TERHADAP TINGKAT INTESITAS WARNA DAN KELUNTURAN WARNA PADA KAIN KATUN DENGAN FIKSATOR KAPUR TOHOR (CaO) Alya, Neng Via Nurjanahtul; Fahriani, Vera Pangni; Wahyuningtyas, Aulia
Jurnal Teknologi Kimia Unimal Vol 13, No 2 (2024): Jurnal Teknologi Kimia Unimal - Nopember 2024
Publisher : Chemical Engineering Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jtku.v13i2.18778

Abstract

Kayu secang (Caesalpinia sappan linn) telah banyak digunakan untuk mewarnai kain, salah satunya kain kapas. Penelitian ini bertujuan untuk: (1) mengetahui pengaruh waktu perendaman sabut kelapa dengan kayu Secang (Caesalpinia sappan linn) terhadap intensitas warna kain kapas. (2) mengetahui pengaruh waktu perendaman sabut kelapa dengan kayu Secang (Caesalpinia sappan linn) terhadap kelunturan warna kain kapas setelah pencucian sabun. (3) menentukan pengaruh kapur tohor (CaO) sebagai fiksator terhadap tingkat intensitas warna kain (4) menentukan pengaruh kapur tohor (CaO) sebagai fiksator untuk tingkat kelunturan warna pada kain kapas setelah pencucian sabun. Hasil penelitian menunjukkan bahwa uji intensitas warna paling gelap menggunakan fiksator kapur, tanpa merendam sabut kelapa mendapat nilai %R sebesar 3,8. Nilai uji tahan luntur warna tanpa merendam sabut kelapa pada sabun cuci menghasilkan nilai rata-rata 4 yang berada dalam kategori baik. Sementara itu, dengan merendam sabut kelapa, tahan luntur warna sabun cuci menghasilkan nilai rata-rata 4 dalam kategori baik. Fiksator kapur tohor (CaO) mempengaruhi tingkat intensitas warna, di mana perlakuan dengan fiksator kapur tohor (CaO) menghasilkan warna yang lebih gelap. Untuk tahan luntur warna pada sabun cuci dengan fiksator kapur tohor (CaO) dan tanpa perlakuan fixator kapur tohor (CaO) tidak dapat berubah dan menghasilkan nilai yang sama, dimana fixator kapur tohor (CaO) dapat mempertahankan nilai tahan luntur warna pewarna alami yang telah diserap kain.
Co-Authors Agustian Suseno Alifah, Farkha Nur Alwardah, Chairunnisa Alya, Neng Via Nurjanahtul Anwari, Luluatun Apid Hapid Maksum Aripin Aripin Aulia Wahyuningtyas Bagastama, Bima Darmanto, Prihadi Setyo Dessy Agustina Sari Elvandari, Milliyantri Enjang Ahmad Juanda Enjang Akhmad Juanda Fadzrin, Al Ghifary Marendra František Hrdlička Hanny Dian Kharisma Hrdlička, František Ismi Ari Fitria Iwan Nugraha Gusniar Kusuma, Daffa Meifan M. Djaeni Marchanda Rahmawati Martin Nahadi Pertiwi, Suciani Rahma Prihadi Setyo Darmanto Rahmat Hidayat Reza Setiawan Rieval Ade Putra Rikky Rifaldy Rizki Achmad Darajatun Rusman Rusman Suciani Rahma Pertiwi Sugeng Riyadi Surya Ma’rufi Fajar Sutrisno Wahyuningtyas, Aulia Wawan Wahyu Yuda, Dimas