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All Journal KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Indonesian Journal of Multidisciplinary on Social and Technology JURNAL ILMIAH TEKNIK INDUSTRI DAN INOVASI (JISI) Jurnal Teknik Industri dan Manajemen Rekayasa
Sahiba Sahila
Politeknik Negeri Jakarta
Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Library & Information Science Social Sciences

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Pengaruh Konsentrasi Pigmen terhadap Nilai CIELAB dan ΔE Tinta Fleksografi dengan Arah Warna Bluish Shade pada Substrat LDPE White Prihan Ramadan; Sahiba Sahila; Heribertus Rudi Kusumantoro
Indonesian Journal of Multidisciplinary on Social and Technology Vol. 4 No. 2 (2026): Maret - Juni
Publisher : PT Ilmu Data Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69693/ijmst.v4i2.10946

Abstract

Pigmen berperan sebagai sumber utama pembentuk warna pada tinta cetak. Keberadaan tinta dalam proses pencetakan sangat penting karena berfungsi menghasilkan tampilan warna pada berbagai jenis media, seperti kertas, tekstil, maupun plastik. Selain memberikan nilai estetika, tinta juga berkontribusi terhadap kualitas dan daya tahan hasil cetak. Variasi konsentrasi pigmen dapat menyebabkan perbedaan nilai warna yang dihasilkan, sehingga diperlukan formulasi yang tepat untuk mengatasi permasalahan tersebut. Penelitian ini bertujuan untuk menganalisis pengaruh konsentrasi pigmen terhadap karakteristik warna bluish shade tinta fleksografi pada substrat LDPE White menggunakan parameter CIELAB dan ΔE. Metode penelitian dilakukan dengan memvariasikan konsentrasi pigmen merah pada lima formulasi tinta, sedangkan komposisi varnish dijaga tetap. Setiap formulasi dicetak menggunakan metode proofing hand anilox. Pengujian dilakukan untuk mengetahui kecenderungan perubahan arah warna dan intensitas warna hasil cetak menggunakan spektrofotometer berdasarkan parameter L, a, b, dan ΔE. Pengujian ini juga dilakukan untuk mengevaluasi tingkat kesesuaian warna terhadap standar yang ditetapkan pelanggan. Hasil penelitian menunjukkan bahwa variasi konsentrasi pigmen sebesar 61–65 gram memberikan pengaruh terhadap nilai CIELAB dan ΔE yang dihasilkan. Formulasi T4 dengan konsentrasi pigmen 64 gram menghasilkan karakteristik warna yang paling mendekati standar, dengan nilai L sebesar 46,32, a sebesar 67,74, dan b sebesar -9,82 serta nilai ΔE terendah sebesar 0,89. Hasil ini menunjukkan bahwa konsentrasi pigmen berperan dalam pembentukan karakter warna bluish shade pada tinta fleksografi dan memengaruhi tingkat perbedaan warna yang dihasilkan pada substrat LDPE White.
Analisis proses pembuatan kalender berbahan dasar kertas daur ulang dengan campuran bunga telang menggunakan pendekatan 5W1H Jaka Santosa; Sahiba Sahila; Rachmah Nanda Kartika; Rafi Aditama; Muhammad Ivan Maulana; Mafaid Rizky Pratama; Musthofa
Jurnal Teknik Industri dan Manajemen Rekayasa Vol 4 No 1 (2026)
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jtimr.v4i1.13714

Abstract

Commercial calendar production typically uses virgin paper, contributing to increased wood fiber consumption and waste. This condition encourages the development of environmentally friendly alternatives using recycled materials. This study aims to produce a desk calendar made from recycled paper mixed with butterfly pea flowers as a natural dye and aesthetic element, and to evaluate the effectiveness of its production process.The study involved several stages, including recycled paper processing (soaking, pulping, mixing with butterfly pea petals, sheet forming, drying, and cutting) and calendar assembly (cutting carton board, applying linen cover, printing A5 calendar design, punching spiral holes, installing spiral wire, and attaching a 7×7 cm glass component). The production process was evaluated using the 5W1H framework to identify key factors, constraints, and methodological effectiveness.The resulting calendar displays natural visual characteristics,coloration from butterfly pea pigment, and an additional functional element through the integration of a small glass piece. Analysis shows that paper-making is the most time-consuming stage, while the assembly process is relatively efficient.The recycled paper calendar incorporating butterfly pea flowers was successfully developed as an eco-friendly product with strong aesthetic value and added functionality. Further improvements are recommended for achieving consistent paper thickness and optimizing drying time.
Pengembangan produk ecovault berbahan limbah kertas menggunakan pendekatan Design Thinking Salma Aulia Husin; Sahiba Sahila; Rachmah Nanda Kartika; Fadillah Tri Widiawati; Florenthia Meylianthi; Kholifaturrahma; Erlangga Saputra
Jurnal Teknik Industri dan Manajemen Rekayasa Vol 4 No 1 (2026)
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jtimr.v4i1.13723

Abstract

The increasing volume of cellulose-based waste has intensified the need to utilize paper waste into products with higher functional value. This material has considerable potential to be developed into functional products when processed through a systematic design approach. This study aims to develop Ecovault, an environmentally friendly storage product made from cardboard and paper pulp, using the Design Thinking approach. During the empathize stage, a survey was conducted to identify user needs, which indicated strong support for the use of recycled materials. The define stage identified two main issues: the low utilization of paper waste and the demand for small-sized storage products with an attractive appearance. The initial concept was realized in the form of a flower-pot-shaped storage through 3D rendering and subsequently tested through prototype development. The first prototype experienced structural issues, leading to a design revision by changing the pot shape from cylindrical to box-shaped. This modification improved the stability, strength, and structural neatness of the final prototype. The results demonstrate that paper waste can be transformed into functional and aesthetic storage products through an appropriate design approach.
PEMBUATAN KERTAS INDIKATOR ALAMI DARI BUNGA TELANG (CLITORIA TERNATEA), KUNYIT (CURCUMA LONGA), DAN JANTUNG PISANG (MUSA ACUMINATA) Sahiba Sahila; Khalda Khairunnisa Mulyana; Tsalis Muthia Kamila; Mitzy Balqist Dhabitah; Nahya Alya; Achmad Dzaki; Anisa Nuraini
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 9 No 2 (2026): Jurnal Katalis Volume 9 Nomor 2 Tahun 2026
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v9i2.14606

Abstract

The use of synthetic indicators, which may cause chemical pollution and are relatively expensive, has encouraged the development of natural indicators that are more environmentally friendly, economical, and easily accessible. This study aimed to investigate the potential of butterfly pea flower (Clitoria ternatea), turmeric (Curcuma longa), and banana bract (Musa acuminata) extracts as materials for natural indicator paper within a pH range of 1–14. The research was conducted by extracting each material using 96% ethanol with a ratio of 1:4 for 24 hours. The resulting filtrates were diluted with distilled water and used to soak filter paper for 30 minutes to produce natural indicator papers. The indicator papers were then tested in solutions with pH values ranging from 1 to 14 to evaluate their color changes, sensitivity, and working range. The results showed that butterfly pea flower exhibited the best performance with distinct color changes from red in acidic conditions, purple near neutral pH, to green and yellow in strongly alkaline conditions. Turmeric demonstrated significant color changes mainly in alkaline conditions, changing from yellow to orange and reddish-brown, making it more suitable as an indicator for alkaline solutions. Meanwhile, banana bract showed color changes with lower intensity and less contrast compared to butterfly pea flower and turmeric. Based on the findings, butterfly pea flower has strong potential as a versatile natural indicator with a wide pH range, while turmeric is more effective for detecting alkaline solutions.
Pengaruh Jenis Laminasi terhadap Kuat Tarik dan Perubahan Warna pada Pressure sensitive label PE White Miko Dwi Saputra; Vika Rizkia; Sahiba Sahila
JURNAL ILMIAH TEKNIK INDUSTRI DAN INOVASI Vol. 4 No. 3 (2026): Juli : Jurnal Ilmiah Teknik Industri dan Inovasi
Publisher : CV. ALIM'SPUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59024/jisi.v4i3.1981

Abstract

Pressure sensitive labels (PSLs) made of polyethylene (PE) white are widely used in the packaging industry due to their flexibility, moisture resistance, and ease of application on various substrates. This study aimed to examine the effect of glossy and matte lamination on the tensile strength and color difference (ΔE) of PE white PSLs. An experimental method was employed, with tensile testing conducted using a universal testing machine (UTM) in accordance with ASTM standards and color measurement performed using a spectrodensitometer based on the CIE Lab system. The samples were divided into three treatment groups, namely no lamination, glossy lamination, and matte lamination, with ink coverage controlled at two design conditions, full ink and minim ink. The results indicated that lamination type significantly affected both the mechanical and visual characteristics of the labels. In the tensile strength test, the highest mean value was obtained by one treatment group, indicating superior resistance to tensile loading. In terms of color stability, higher ΔE values indicated greater color change and lower lightfastness, whereas lower ΔE values reflected better color retention. Overall, the findings show that the combination of lamination type and ink coverage influences the performance of PE white PSLs in both mechanical strength and color stability.
Co-Authors Achmad Dzaki Anisa Nuraini Erlangga Saputra Fadillah Tri Widiawati Florenthia Meylianthi Heribertus Rudi Kusumantoro Jaka Santosa Khalda Khairunnisa Mulyana Kholifaturrahma Mafaid Rizky Pratama Miko Dwi Saputra Mitzy Balqist Dhabitah Muhammad Ivan Maulana Musthofa Nahya Alya Prihan Ramadan Rachmah Nanda Kartika Rafi Aditama Salma Aulia Husin Tsalis Muthia Kamila Vika Rizkia