The development of convex copies has important aspect on education and life of the blind. Convex copies on capsule paper are used in education as maps and as information papers for the blind. Quality and quantify control of image parameters may be come a tool for the evaluation of convex copies. Quantitative and objective quality control of convex prints could help to improve the design and performance of Braille copiers.In the paper we present the attempt and measurements of the parameters (high of the convexity, non-uniformity of the shape of Braille points, diameter of Braille point), influencing the perceived quality of Braille printouts. We also present trial determination of a combined index of the quality of the Braille characters and convex copies of graphics. In order to improve the design of the copying device on microcapsule paper being developed. We intend to apply the index to assess the influence of the parameters of the copying process on the quality of the copies.