Tujuan pengabdian ini adalah untuk memberikan pelatihan kepada siswa SMK N 7 Jakarta jurusan produksi grafika terkait kompetensi pengetahuan bahan kertas yang dilakukan secara daring. Kompetensi tersebut sangat penting dikuasai oleh tenaga ahli bidang grafika karena sangat berkaitan erat dengan proses produksi grafika percetakan. Kegiatan dilakukan dalam bentuk seminar untuk meningkatkan pemahaman siswa mengenai proses pembuatan kertas, bahan penyusun kertas, jenis-jenis kertas serta pengujian kertas sesuai stanar SNI yang berlaku.Hasil evaluasi pelaksanaan pelatihan menunjukkan bahwa setelah pelaksanaan pengabdian ini siswa telah memahami dan dapat mengidentifikasi jenis-jenis kertas dengan benar.
Glycerol as a by-product of biodiesel continues to increase in Indonesia. Glycerol has a vast potential implementation in the cosmetic, pharmaceutical, and printing industries. This research aims to utilize glycerol as a by-product of palm biodiesel as a plasticizer in bioplastic applications as an alternative material for print laminating. Transesterification is carried out to separate crude glycerol from fatty acid methyl ester (biodiesel). Purification of crude glycerol was carried out using phosphoric acid. The results showed that the purified glycerol obtained from the by-product of biodiesel production could be used as a plasticizer for printed lamination bioplastic application. The purified glycerol's pH, density, and viscosity were 7.27; 1,248 g/mL; and 35.63 CST, respectively. The trial of printed lamination has proven that bioplastic lamination is lighter than conventional laminating, according to the higher CIE L* value. Moreover, the total color difference of prints laminated by bioplastics is lower than prints with conventional laminating, indicated by the value of delta E in all color samples of bioplastic laminated prints, which are lower than conventional laminating.
Based on observations, the tender price is below 80% of the HPS (Provisional Estimated Price). With the bid price being quite far from the HPS (Provisional Estimated Price), it raises questions about the credibility of the print calculation experts. This study uses a quantitative method, namely analyzing the price disparity of the HPS (Provisional Price Estimate) offering and the price disparity of each company's printing components to the average survey price of printed components. Based on the analysis results, the average supply disparity value is 30.17% and Company C (PT C) has the highest disparity value of 73.41%. A high bid price disparity indicates that the auction is relatively fair and there are no rules in determining bidder prices. The very high disparity in the value of molded components at Company C (PT C) indicates an alleged monopoly on the price of molded components.
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