USE OF TRANSPARENT PLASTICS IN STEREOTOPOGRAPHIC PROCESSING,
Abstract
The paper presents a short description of the technology involved in the use of plastics for stereotopographic processing and restoring of maps. Three types of processing may be done with plastics in the composition of topographic maps on conventional equipment: direct engraving of the original on the engraving layer of a plastic in steps according to the composition of the map from different elements (topography, contours, hydrography); engraving of the complete original (without separation into steps); production of the complete map serving as master for engraving of the original. Completed operations showed that with a khostafan plastic sheet it is possible to obtain original maps of a 3rd-4th degree of difficulty. When the more transparent astrolan plastic is used, it is possible to use this method in the preparation of maps of higher degrees of difficulty. It is best to use transparent plastics in the composition of photographic layouts for the production of maps of flat regions. Experimental studies of the preparation of the photographic layout on transparent plastics by means of a rinsed relief were carried out. It is known that according to these techniques only striated copies can be obtained on the gelatinous layer. To obtain a half-tone original, such as a photographic layout, a 72 1/mm screen was used through which images were printed by the contact method from the half-tone negative onto the gelatinous, color-sensitive layer applied to the plastic.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0626790
Entities
People
- M. A. Blyumin
Organizations
- United States Army Foreign Science and Technology Center