Mixed Reality (MR) gradually integrates into public consciousness, accelerating the need to develop commercial MR applications. However, the prohibitive cost of devices, the complexity of modelling software, the learning difficulties with programming languages, and the need for fidelity and interaction pose significant preliminary obstacles for developers and designers. Therefore, this paper intends to resolve the prototype obstacles in the early to mid stages by designing a rapid paper prototyping tool suitable for multi-disciplinary designers to participate in developing mixed reality applications and environments. The MR paper prototyping (MRPaperPro) technique attempts to contribute to developing MR content that mediates between information-orientated and entertainment-orientated approaches by developing affordable, readily accessible, medium-high visual and interaction fidelity tools. It requires the construction of multilayer paper modules, repositionable model components, and spectacles that analogue the HMD's field of view to facilitate designers to interact with users directly and capture manifold responses. Finally, it elaborates on the findings of the experiments.