Milk - building safety architecture poster. USSR.

This item belongs to a set of 15 posters called "Safety of painting products in mechanical engineering"
Title: IT IS FORBIDDEN TO STORE FOOD PRODUCTS IN THE WORKING AREA
"MILK" written on the tetra brick.
This poster is quite interesting because the perspective of the tetra brick of milk looks like that of a skyscraper, the points of the container resemble windows 
From a technical point of view this poster is made with a three-point perspective.
What is a three point perspective? 
Three-point perspective is often used for buildings seen from above (or below). In addition to the two vanishing points from before, one for each wall, there is now one for how the vertical lines of the walls recede. For an object seen from above, this third vanishing point is below the ground. For an object seen from below, as when the viewer looks up at a tall building, the third vanishing point is high in space.
Three-point perspective exists when the perspective is a view of a Cartesian scene where the picture plane is not parallel to any of the scene's three axes. Each of the three vanishing points corresponds with one of the three axes of the scene. One, two and three-point perspectives appear to embody different forms of calculated perspective, and are generated by different methods. Mathematically, however, all three are identical; the difference is merely in the relative orientation of the rectilinear scene to the viewer.
On the other side, the U.S.S.R. was notorious for its omnipresent propaganda. The Bolshevik regime proved wonderfully adept at using the skills of talented graphic designers and writers to create vivid images and slogans aimed at ideologically motivating the masses to transform society. Their work permeated all aspects of life during the communist era, including art, industry, and science. The state even invested a lot of artistic endeavor into such mundane areas as health and safety at the workplace and this original poster is an excellent example of this policy.
Size: 39x58cm
Artists: N. N. Papirnaya and S. A. Fridman.
Circulation: only 5000 copies, in other words, this is a very rare poster.
Publisher: "Reklama"
Printed in 1987
Made in Kyiv, Ukrainian SSR, USSR.
This is guaranteed 100% original soviet period item manufactured in the USSR.
This is not a recent issue,replica or tourist souvenir.