Kotelnikov Pavel N.  — artist-restorer of the highest category of metal works; The State Research Institute for Restoration, head of the department of scientific restoration of metal works
E-mail: 113metal@gmail.com

Kurakov Sergey V.  — Researcher engineer; Bauman Moscow State Technical University, Engineer I cat. of Museum
E-mail: kurakov@bmstu.ru

Samoilov Vladimir B. — Bauman Moscow State Technical University, associate professor of the Department of Materials Processing Technologies
E-mail: wladsam@mail.ru

The modern chemical industry offers a large selection of composite polymer materials for additive 3D printing technologies. New structural solutions and new chemical formulas for plastics are emerging. This type includes a modern group of materials for producing transparent models in 3D printing. The article provides a comparison of two methods of additive technologies in relation to the restoration of losses of museum objects (polytechnic type), when the functionality of the ancient mechanism was completely restored, while maintaining the principle of reversibility in restoration. The authors highlight the main criteria that influence the quality and accuracy of the resulting additive products and consider the issues of choosing optimal shaping modes using 3D printing and post-additive processing (grinding, polishing, paint coating). In recent years, there has been a growing interest among museum staff, art historians and cultural experts in exploring the possibilities offered by new technologies in relation to museum space and exhibition solutions. Undoubtedly, methods of creating transparent products and models will allow visitors and museum specialists to take a fresh look at the exhibit and / or its parts, for example, to obtain an accurate idea of the lost form of a museum object. In the article, the authors highlight promising areas for using additive technology products in the museum space in the form of visual models, art objects, copies, duplicates, etc. The work of restoring the loss of polytechnic museum exhibits required high interdisciplinary interaction between various specialists, both technical and humanitarian fields of science, education and culture, and the authors believe that the experience shown in this article will be of interest to a wide range of readers. The proposed material is published for the first time.

3D printing, additive technologies in restoration, light transmittance parameters, luminosity, photopolymer plastic, polytechnic museum exhibits, transparency.