A composite elastic material useful for prosthetic applications is constituted of at least one cured silicone elastomer layer containing silicone oil and hollow microspheres dispersed throughout the elastomer layer. The method and system include providing a server that communicates with the device over a network, and associating images stored on at least one photo-service site with a user account. The parameters are functions of the mechanical stress which is evaluated to determine residual intrinsic stress distribution and then the planarity or nonplanarity of the strip.