Development, Evaluation and Heavy Metal Analysis of Tailor’s Chalk Using Eggshell and Green Apple Snail Shell in Three Formulations

Abstract

This study focused on developing, evaluating, and analyzing the safety of tailor’s chalk made from eggshells and green apple snail shells in three different formulations. Eggshells and green apple snail shells, both rich in calcium carbonate were used as main materials for tailor's chalk production. These substances were collected, washed, and ground to fine powders to prepare the product base. Using descriptive and developmental research, the quality of the chalk was assessed by (60) sixty respondents who are garment faculty members, students dressmakers and tailors in a 4-point Likert-scale. The assessment included several features like, appearance, texture, marking ability, erasability, durability and water solubility. Formulation 2 was the best rated of the three formulations as a “Moderately Acceptable” preparation. Statistical analysis (ANOVA) revealed that there were significant differences between respondent groups and Formulation 2 consistently performed better. In addition, heavy metal testing conducted by the Philippine Institute of Pure and Applied Chemistry (PIPAC) showed that the formulation is safe in terms of mercury, lead, cadmium, arsenic and chromium content making it non-toxic and user-safe. In conclusion, the result suggested that waste sources, such as eggshell and green apple snail shell, can be successfully utilized for sustainable and eco-friendly alternative substitute of commercial tailor’s chalk. The study highlighted the importance of sustainable feedstock in enhancing innovation and recycling waste; as well as texture improvement to encourage scalability for local industries.