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Bambang Oetojo, Bambang
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Mutu kulit jaket dari kulit domba peranakan merino Oetojo, Bambang; Lutfi, Muchtar; Widari, Widari; Basalamah, Hasan
Majalah Kulit, Karet, dan Plastik Vol 5, No 9 (1990): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1307.668 KB) | DOI: 10.20543/mkkp.v5i9.458

Abstract

To compare the quality of jacket leather output from merino descendent sheep skin to that one yield from local sheep skin is the purpose of this research. For this comparative research it was used four pieces of good quality merino descendent sheep skin and four pieces of good quality local sheep skin. Through the ordinary tanning method, all of the skins, either merino descendent sheep skins or the local one were process into jacket leather. Further more the jacket leathers output from this research were visual investigeted and physical tested. Statistical analysis points out that there is unsignify difference (P ≼ 0,05) the influence of the spesies either it is merino descendent sheep skin or the local one to the tensile strenght and the stretch of jacket leather. It is also unsignify difference (P ≼ 0,05) the influence of the spesies either it is merino descendent sheep skin or the local one to the quality of jacket leather.Practical meaning of this research is that merino descendent sheep skin may be tanned into jacket leather having same quality to that one from local sheep skin. 
Penyamakan kulit lapis samak kombinasi dengan bahan penyamak alumunium sebagai bahan penyamak pendahuluan Oetojo, Bambang
Majalah Kulit, Karet, dan Plastik Vol 2, No 5 (1987): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1363.658 KB) | DOI: 10.20543/mkkp.v2i5.278

Abstract

As a tanning material alum salt has similar properties of the basic chromium sulphate. It is, therefore, the purpose of this research is to exchange chromium tannage with alum tannage in pretanning for the vegetable tanned lining leather. In doing such a way the chromium pollution may be eliminated, whereas the alum pretanned lining leather output must be fulfill the physical and chemical requirements as that one of the chrome pretanned. In pretanning the use of  alum tannage varied from 2,5%, 3,0%, 3,5% and 4,0%. Afterwards the subsequent process was vegetable tanning using 30% of mimosa powder. The lining leather output from the research was physical and chemical tested. The practical meaning of this research is that for pretanning the vegetable tanned lining leather it is possible to use 2,5% alum salt. The values of the physical and chemical test obtained are that the degree of tannage is 94,54, tensile strength is 174,24 kg/cm2, and strength is 22%. Water absorption for 2 hours is 133,01% and for 24 hours is 134,48%. Whereas the flexural endurance is unbreak condition.
Mutu kulit chamois dari kulit domba peranakan merino Oetojo, Bambang
Majalah Kulit, Karet, dan Plastik Vol 7, No 12-13 (1992): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (908.196 KB) | DOI: 10.20543/mkkp.v7i12-13.473

Abstract

The purpose of this research is to compare the quality of chamois leather output from merino descendent to that one from local sheep skin. In the actualization it was used four pieces of merino descendent sheep skin and four pieces of local sheep skin. The skins was processed into chamois leather. Chamois leathers output from this research, either from merino descendent sheep skin or local sheep skin were visually investigated. Statistical analysis points out that there is unsignify difference (P ≤ 0,05) the influence of the species either it is merino descendent sheep skin or local one to the quality of chamois leather. Practical meaning of this research is that merino descendent sheep skin may be tanned into chamois leather having some quality to that one from local sheep skin. 
Penggunaan fermen sari dedak padi untuk proses pembuangan kapur Oetojo, Bambang
Majalah Kulit, Karet, dan Plastik Vol 14, No 26 (1999): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (733.971 KB) | DOI: 10.20543/mkkp.v14i26.293

Abstract

This researfh inted to know the capabaliyu of fermented infusion of rice bran for delimoing process. Tge raw material used was foat “pelt” skin of 14 places. They were sided into two parts along the back bone and the gruped to delimed using fermented infusion of rice brabn of 5 days, 10 days and 15 day respectively. Fermented infusin of rice bran used was 100% on pelt weight and the duratuion of deliming process was 60 minutes. Phenolphthalein indicator was used in delimbing process to determine the lime streak. Practical meaning of this research is, germented infusion of rice bran of 15 days gives thorough deliming.  INTISARI Penelitian ini bertujuan untuk mengetahui kemampuan sari dedak padi yang difermentasikan, untuk proses  pembuangan kapur Bahan mentah yang digunakan adalah kulit “pelt” kambing sebanyak 14 lembar. Kulit “pelt” tersebut dibelah menjadi dua bagian menurut garis punggung dan kemudian dikelompokkan menjadi tiga. Kelompoj pertama, kedua dan ketiga diproses pembuangan kapur menggunakan sari dedak yang difermentasikan 5 hari, 10 hari dan 15 hari berturut-turut. Feremen sari dedak padi yang digunakan 100% dari berat kulit “pelt” dan lama proses pembuanagn adalah 60 menit. Indikator phenolphthalein digunakan dalam proses pembuanagfn kapur, untuk menentukan garis kapur. Arti praktis dari penelitian ini adalah sari dedak padi yang difermentasikan selama 15 hari menghasilkan proses pembuanagn kapur, untuk menentukan garis kapur. Aerto praktis dari penelitian ini adalah, sari dedak padi yang difermentasikan selama 15 hari meghasilkan pembuangan kapur yang sempurna. 
Teknologi penyamakan kulit kras buaya Oetojo, Bambang
Majalah Kulit, Karet, dan Plastik Vol 8, No 14 (1992): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1206.414 KB) | DOI: 10.20543/mkkp.v8i14.479

Abstract

The objective of this research is to know the influence of basic chromium tanning agent used to the colour and softness of the crust leather. In the carrying out it was used 12 pieces green salted cured crocodile skin of 11 up to 14 inch width. All of the crocodile skins were than pre-tanned with basic chromium tanning agent varying from 0.5%.; 1.0% and 1.5%. Each treatment needed two pieces of crocodile skin and was done twice. They were than tanned with 30% Irgatan LV. The Crust leather out put from the research was visual investigated for the Colour and the softness. Statistical analysis paints out that there is extremely signify difference (P < 0.01) the influence of the use of basic chromium tanning agent to the coulor and the softnees of the crusts leather. Practical meaning of this research is that to tan crocodile skin to be crust leather it is used 1.0 % basic chromium tanning agent 30% Irgatan LV.   INTISARI Tujuan Penelitian ini adalah untuk mengetahui pengaruh bahan penyamak krom basa yang digunakan terhadap warna dan kelemasan kulit kras. Dalam pelaksanaannya digunakan 12 lembar dengan lebar 11 sampai 14 inci yang diawet dengan garam. Semua kulit buaya diproses sampai dengan pengasaman dengan cara yang sama. Kemudian kulit buaya tersebut disamak pendahuluan dengan bahan penyamak krom basa yang bervariasi dari 0,5 %; 1.0% and 1.5%. setiap perlakuan memerlukan dua lembar kulit buaya dan dikerjakan dua kali. Kemudian kulit buaya tersebut disamak dengan 30% Irgatan LV. Kulit kras yang dihasilkan dari penelitian diamati warna dan kelemasannya. Analisa statististik menunjukkan bahwa ada beda nyata (P ≤ 0.01) pengaruh penggunaan bahan penyamak krom basa terhadap warna dan kelemasannya kulit kras. Arti Praktis penelitian ini adalah untuk menyamak kulit buaya menjadi kulit kras digunakan 1,0% bahan penyamak krom basa dan 30% Irgatan LV. 
Penelitian pengaruh waktu penekanan dan tekanan terhadap daya rekat lem sintesis untuk kulit sol, kulit boks, dan pvc Hs, Sunarso; Oetojo, Bambang
Majalah Kulit, Karet, dan Plastik Vol 3, No 7 (1988): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (784.251 KB) | DOI: 10.20543/mkkp.v3i7.289

Abstract

Glue is valuable substance for sealing two things (compact thing). The research uses synthetic, and the adhesive strength reaches for sole leather, PVC to sole leather at the pressure of 30 bars, pressure duration 6 minutes (5,22 kg/10 cm2, and 5,68 kg/ 10 cm2), for PVC to PVC, box leather tp PVC at the pressure of 20 bars and pressure duration 6 minutes (5,98 kg/10 cm2 and 7,12 kg/10 cm2), whereas for box leather to sole leather at the pressure of 30 bars, pressure duration 9 minutes (4,36 Kg/10 cm2).
Pengaruh penggunaan putih telur dan gelatin terhadap ketahanan gosok cat tutup Oetojo, Bambang
Majalah Kulit, Karet, dan Plastik Vol 12, No 23 (1997): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1079.721 KB) | DOI: 10.20543/mkkp.v12i23.351

Abstract

The aim of this study is to know the influence of the use of egg albumen and gelatin as a film forming or as a binder in making a finish to the rubfastness. For making a finish it was also needed Turkish Red Oil as a softener, direct dye as a colour and water as a solvent. In this research it was used 9 pieces of goat crust leather. They were then sided into 2 parts along the back bone. Part of them were coated on the grain with a finish made from 3% egg albumen, 1% direct dye, 0,5% Turkish Red Oil and 95.5% water. The other crusts were coated on the grain with a finish made from 3% gelatine, 1% direct dye, 0,5% Turkish Red Oil and 95.5% water. The films of the finishes were sprayed with formalin solution of 10% to be fixed, then they were dried and glazed. Furher the films of the finishes were tested for the rubfasteness using crock metre apparatus. Partical meaning of this research is, using 3% gelatin as film forming or as a binder for making a finish, the value of the rubfasness is higher than using 3% egg albumen. INTISARI Tujuan penelitian ini adalah untuk mengetahui pengaruh penggunaan putih telur dan gelatin sebagai bahan pembentuk film atau sebagai bahan perekat dalam membuat cat tutup, terhadap ketahanan gosok. Untuk membuat cat tutup diperlukan pula Turkish Red Oil sebagai bahan pelemas, cat direct sebagai pewarna dan air sebagai pelarut. Dalam penelitian ini digunakan 9 lembar kulit kras kambing Kulit kras tersebut kemudian dibelah menjadi 2 bagian menurut garis punggung. Sebagai kulit kras dicat pada bagian rajah dengan suatu larutan yang dibuat dari 3% putih telur, 1% cat direct, 0,5% Turkish Red Oil dan 95,5% air. Kulit kras yang lain dicat pada bagian rajah dengan suatu larutan yang dibuat dari 3% gelatin, 1% cat direct, 0,5% Turkish Red Oil dan 95,5% air. Film cat tutup tersebut disemprot dengan larutan formalin 10% agar menjadi kuat, kemudian dikeringkan dan dikilapkan. Selanjutnya film cat tutup diuji mengenai ketahanan gosok, menggunakan alat uji ketahanan gosok. Arti praktis dari penelitian ini adalah, menggunakan 3% gelatin sebagai bahan pembentuk film atau bahan perekat untuk membuat cat tutup nilai ketahanan gosok lebih tinggi dari pada menggunakan 3% putih telur.
Penggunaan gelatine untuk finishing kulit Oetojo, Bambang
Majalah Kulit, Karet, dan Plastik Vol 12, No 22 (1996): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1139.34 KB) | DOI: 10.20543/mkkp.v12i22.338

Abstract

Gelatine may be used as a film forming or as a binder on glazed finishing method. The purpose of this research is, therefore, to know the appropriate amount of gelatine which is used on finishing to give a satisfactory effect. For this research it was used 9 pieces of crust goat skin. The crusts were then finish varying from 1 percent, 2 percent and 3 percent. It was used Turkish Red Oil in amount of 0,5 percent. Total solution of the finish should be 100 percent by adding amount of water. In this case water is as a solvent. The crusts were then pad coated, spray coated and top coated with the finish which had been prepared before and were fixed with 10 percent of formalin solution and were glazed. Further more they were tested for the rub fastness using crock metre apparatus. Practical meaning of this research is, the use of gelatine as much as 3 percent in making a finish will give a good.   ABSTRAK Gelatine dapat pula digunakan sebagai bahan pembentuk film atau bahan perekat, pada proses penyempurnaan kulit dengan cara dikilapkan. Oleh karena itu, maka tujuan dari penelitian ini adalah untuk mengetahui jumlah yang sesuai dari gelatin untuk membuat larutan cat tutup pada proses penyempurnaan, agar memberi hasil yang memuaskan. Dalam pelaksanaan penelitian ini digunakan Sembilan lembar kulit kras dari kambing. Kulit kras kambing kemudian dibelah menjadi dua bagian menurut garis punggung. Gelatin yang digunakan untuk membuat larutan cat tutup bervariasi dari satu persen, dua persen dan tiga persen. Digunakan cat direct sebesar satu persen sebagai pewarna. Sebagai pelemas digunakan Turkish Red Oil dalam jumlah sebesar setengah persen. Jumlah larutan cat tutup seluruhnya adalah seratus persen dengan jalan menambahkan air. Dalam hal ini air adalah sebagai bahan pelarut. Kemudian kulit kras kambing diulas dengan larutan cat tutup, disemprot dengan larutan pelapis penutup atas yang telah disediakan sebelumnya. Kemudian kulit disemprot dengan formalin sepuluh persen dan setelah kering dikilapkan dengan mesin. Selanjutnya kulit hasil penelitian diuji mengenai ketahanan gosok cat menggunakan alat crock metre. Arti praktis dari penelitian ini adalah bahwa, penggunaan gelatin sebesar 3 persen pada pembuatan larutan cat tutup, menghasilkan ketahanan gosok cat tutup yang baik. 
Pengaruh ammonia sebagai “killing agent” pada pengecatan bulu kulit kelinci Oetojo, Bambang; Lutfi, Muchtar; Rahayu, Esti
Majalah Kulit, Karet, dan Plastik Vol 4, No 8 (1989): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1335.514 KB) | DOI: 10.20543/mkkp.v4i8.455

Abstract

The objective of this research is to find out the effluence of ammonium  hydroxide as killing agent to the uniformity and fintness of the colour of rabbit fur after dyeing. This research made use of 27 pieces of green salted rabbit skin having white colour. In killing process the rabbit fur was treated recpectively in a liquar of 10, 15 and 20 cubic centimetres of ammonium hydroxide of 22% strength in one litre of water, furthermore the fur was dyed. The dyed fur was visually examined for the uniformity and fitness of the colour of the dyed fur, and physically tested for the rub fastness of the dye.The highest value of rub fastness achieved by the dyed rabbit fur treated in 20 cubic centimetres of ammonium hydroxide in one litre of water. It advisable to use 20 cubic centimetres of ammonium hydroxide of 22 % strength in one litre of water as killing agent in rabbit fur dyeng process. 
Teknologi penyamakan kulit wet blue buaya Oetojo, Bambang
Majalah Kulit, Karet, dan Plastik Vol 8, No 14 (1992): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (938.804 KB) | DOI: 10.20543/mkkp.v8i14.480

Abstract

For this study it was used 12 pieces of grain salted crocodile skin of 11 up to 14 inch width. All of the crocodile skin were process up to pickling with the same way. Furthermore pickled crocodile skins were process up to pickling with the same way. Furthermore pickled crocodile skins  and was done twice. The wet blue output from the research was visual investigated for the coulor using staning scale method. For comparition it was used pickled crocodile skins. Statistical analysis pints out that there is unsignify difference (P<0.05) the influence of the used of basic chrome sulphate to the colour of wet blue crocodile skins. Practical meaning of the research is, for tanning of crocodile skins to the wet blue, it is used 1.5% basic chromium sulphate.    INTISARI  Untuk penelitian ini menggunakan 12 lembar kulit buaya yang diawet garam dengan lebar 11 sampai dengan 14 inci. Semua kulit buaya diproses sampai dengan pengasaman dengan cara yang sama. Selanjutnya kulit buaya yang telah diasamkan disamak menjadi “wet blue” menggunakan krom sulfat basa yang bervariasi dari 1,5%; 2,0% dan 2,5%. Setiap perlakuan menggunakan dua lembar kulit buaya yang dikerjakan dua kali. Kulit “wet blue” yang dihasilkan dari penelitian diamati secara visual mengenai warnanya menggunakan metode “staining scale”. Sebagai pembanding digunakan kulit buaya yang diasamkan. Analisa statistik menunjukkan bahwa tidak ada beda nyata (P ≤ 0,05) pengaruh penggunaan krom sulfat basa terhadap warna kulit “wet blue” buaya. Arti praktis penelitian ini adalah untuk menyamak kulit buaya menjadi kulit “wet blue” digunakan 1,5% krom sulfat basa. 
Co-Authors Esti Rahayu Hasan Basalamah, Hasan Krisna Rendi Awalludin Muchtar Luthfie, Muchtar Sunarso Hs, Sunarso Widari Widari, Widari Widhiati Widhiati, Widhiati