The synthesis of the poly (methyl methacrylate) composite containing borax decahydrate microparticles at two different concentrations (such as 5 and 10 wt %) was significant to derive amphibious features (such as wettability and hydrophilicity) by using the atom transfer radical polymerization (ATRP) method. The composite has provided an optimum optical identification level as borax decahydrate (as the filler particle) was used to develop the optical modification in this lightweight composite. The optical development has provided a homogeneously spread of light at the surface and ideal identification conditions in the working area as the modified optical properties were solved through several material problems and developed to improve its amphibious movement in corrosive ambient. Optical identification (by using colour coordinates) has been generated with the development of the lighting homogeneity allowing the surface of the composite product to come to the fore as the result that the surface roughness increased slightly with the rise of the borax microparticle amount. The control of the borax addition has provided the modification of the amphibious design with the rise of wettability to develop multifunctional applications. The surface of this composite has reached sligitly a more hydrophilic feature with the modification of the surface morphology. The decrease of optical transmittance by borax addition in PMMA synthesis has been enhanced with the slight modification of the amphibious design of the composite.