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<p>This study assessed the safety of readily available film-forming (nitrocellulose lacquer, polyurethane, and water-based polyurethane) and penetrating finishes (linseed oil, mineral oil, and beeswax) applied to <i>Samanea saman</i> (Jacq.) Merr. (rain&#xa0;tree) wood. Residues from evaporation, potassium permanganate consumption, and UV-Vis analysis were evaluated with regards to food safety. The durability of the applied film-forming finishes was also tested following standard methods. All the film-forming finishes complied with EU migration limits under the residue on evaporation test, while none of the penetrating finishes passed. Unfinished rain&#xa0;tree samples displayed significantly high overall migration. Furthermore, all finishes, except PU, exhibited high levels of oxidizable components. Except for PUw and BW, all finishing materials passed the UV-Vis test. No lead, mercury, cadmium, and arsenic heavy metals were detected in the migrants from different finishes. Polyurethane consistently demonstrated superior adhesion and film hardness, thus emerging as the most promising finish for wooden tableware and kitchenware. However, to ensure food safety, further investigation to identify the migrating compounds and assess their toxicity, especially from PU, is recommended.</p>

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Evaluation of the food safety of wood finishes

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Aralyn L. Quintos-Cortiguerra,
  • Alexis B. Dorado

摘要

This study assessed the safety of readily available film-forming (nitrocellulose lacquer, polyurethane, and water-based polyurethane) and penetrating finishes (linseed oil, mineral oil, and beeswax) applied to Samanea saman (Jacq.) Merr. (rain tree) wood. Residues from evaporation, potassium permanganate consumption, and UV-Vis analysis were evaluated with regards to food safety. The durability of the applied film-forming finishes was also tested following standard methods. All the film-forming finishes complied with EU migration limits under the residue on evaporation test, while none of the penetrating finishes passed. Unfinished rain tree samples displayed significantly high overall migration. Furthermore, all finishes, except PU, exhibited high levels of oxidizable components. Except for PUw and BW, all finishing materials passed the UV-Vis test. No lead, mercury, cadmium, and arsenic heavy metals were detected in the migrants from different finishes. Polyurethane consistently demonstrated superior adhesion and film hardness, thus emerging as the most promising finish for wooden tableware and kitchenware. However, to ensure food safety, further investigation to identify the migrating compounds and assess their toxicity, especially from PU, is recommended.