This study presents a reinterpretation of elemental data from Indo-Pacific glass beads excavated from the Sungai Mas archaeological site in the Bujang Valley, Malaysia. The published analytical data gathered from literature are used to quote the elemental concentrations, specifically those of copper (Cu), zinc (Zn), iron (Fe), manganese (Mn), chromium (Cr), and arsenic (As). High-precision multi-elemental quantification was done using Instrumental Neutron Activation Analysis (INAA). Reassessment of these data reveals deliberate inclusion of metal oxides to achieve specific colour properties, such as high Cu and Zn in blue and orange beads, and Fe and Mn in black and yellow varieties. Elevated levels of arsenic and antimony further suggest the use of refining and opacifying agents, reflecting advanced glassmaking knowledge and material control. In addition to technological implications, the dataset reflects early anthropogenic fingerprints, possibly linked to recycling of metallurgical by-products. These findings support the role of Sungai Mas as an important production or redistribution center along the Indo-Pacific maritime trade routes. The study highlights how compositional analysis of archaeological materials can inform interpretations of ancient technologies, socio-economic networks, and early environmental interactions.