Microfluidic lab-on-a-chip (LOC) technology is transforming fields such as diagnostics, drug discovery, and biomedical research by enabling precise fluid manipulation at the microscale. However, conventional fabrication methods, such as photolithography and injection moulding, are costly and time intensive. Hence, this study proposes the use of shrink film as a cost-effective and efficient material for fabricating microfluidic devices. Unlike conventional lithography-based methods, shrink film provides a rapid prototyping approach by using its heat-induced contraction properties to create intricate microchannels. Through parametric studies, optimal heating conditions can be identified to achieve precise channel dimensions. Additionally, the study investigates surface properties and fabrication techniques, showing the feasibility of using shrink film as both a direct chip material and a mould for casting.