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Vinsa Cantya Prakasita
Universitas Kristen Duta Wacana
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COMPARATIVE pH ANALYSIS: HOMEMADE COLD CLAY VERSUS COMMERCIAL CLAY FOR CHILD SAFETY Harjani, Centaury; Aditiyarini, Dwi; Prakasita, Vinsa Cantya
Jurnal Bioteknologi & Biosains Indonesia (JBBI) Vol. 12 No. 2 (2025)
Publisher : BRIN - Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jbbi.2025.13507

Abstract

Cold clay, as a non-baking children's play medium, needs to be assessed for its chemical and physical safety, particularly its pH parameters, to ensure safety for children's skin and environmental sustainability. This study aims to characterize the pH of cold clay by comparing homemade and manufactured products. A total of six samples were tested: one homemade (based on polyvinyl acetate, cornstarch, and additives) and five manufactured, colorful ones. The pH measurements were performed using a digital pH meter with three replications, then statistically analyzed using an independent t-test. The results showed a highly significant difference (p < 0.001) between the two groups. Homemade samples had an average pH of 4.75 ± 0.06 (acidic), while manufactured samples ranged from 7.16–7.53 (neutral to slightly alkaline). From a dermatological perspective, homemade pH, which is closer to the natural pH of children's skin (~5.5), is considered safer for long-term contact because it does not disrupt the acid mantle. In contrast, the neutral pH of manufactured products showed better chemical stability but potentially poses challenges in waste management. These findings emphasize the importance of pH characterization in selecting safe materials for the intended application. The study recommends consideration of pH parameters for parents, educators, and industry, as well as the need for further studies on toxicity and environmental impacts to ensure overall safety.
Co-Authors Adrenalin, Sruti Listra Agnesia Endang Tri H. Wahyuni Agnesia Endang Tri Hastuti Wahyuni Agustina Dwi Wijayanti Agustina Viktoria Tae Ajiguna Ajiguna Anak Agung Gede Sugianthara Angelia Astria Aniek Prasetyaningsih Aniek Prasetyaningsih Aniek Prasetyaningsih Aniek Prasetyaningsih Anjela Noya Centaury Harjani, Centaury CHARIS AMARANTINI Charles Rangga Tabbu Christine Stefani Tamelan Dessy Imelda Nirmasari Siregar Dhira Satwika Djoko Rahardjo Djoko Rahardjo Dwi Aditiyarini Enjelin Anjung Susilowati Eunnike Adelina Fauziah, Ima Feblicya Palimbunga Ilham, Jessika Ima Fauziah Ima Fauziah Ima Fauziah Imanjati, Lynda Nugrahaning Inggrid, Annabelle Marie Irein Kusuma Angreini Jade Septhimoranie Jeffi Chandra Kukuh Madyaningrana Laurentia Henrieta Permita Sari Purba Lynda Nugrahaning Imanjati Lynda Nugrahaning Imanjati Lynda Nugrahaning Imanjati Maria Trivonia Sema Marlin Cindy Claudya Malelak Nadya Aprina Theodora Nita Sonia Sipayung Pepiana, Marlen Aviati Sarah Prasetya, Heribertus Sigit Priskila Melinia Wuni Relisantika Yulia Sinaga Sema, Maria Trivonia Septhimoranie, Jade Setiawan, Dwi Cahyo Budi Setya Harianto Sidna Artanto Sipayung, Nita Sonia Sitarina Widyarini Sitarina Widyarini Sruti Listra Adrenalin Sruti Listra Adrenalin Sruti Listra Adrenalin Susilowati, Enjelin Anjung Tara Inastu Kandarp Tati Aryani Theodora, Nadya Aprina Thomas Emanuel Manggotu Nahak Yovita Devina Yovita Devina