Dating bases guide

"Danish" indicates that the course will be held in Danish.

"English" indicates that the teaching will be held in English or a special course will be held in English for foreign students.

There are three broad types of film-base photographic materials: cellulose nitrate, the cellulose acetates, and polyester.

These materials have been used as a support for negatives, positive transparencies, motion pictures, microfilm, and other photographic products.

Unfortunately, cellulose nitrate and the cellulose acetates are unstable.

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The examination slot shows the dates of the exams for all courses in either the autumn or spring semester.The deterioration of cellulose acetate is auto-catalytic, like that of cellulose nitrate; once deterioration has begun the degradation products induce further deterioration.Because of its increased stability, polyester has replaced the cellulose acetates as a support for some, but not all, film products.This period can be very long and changes that occur may have a significant impact on the costs of the works.The base date sets the reference date from which the conditions under which the tender was prepared are considered to have been known by the contractor and so are properly reflected in their price.In particular, institutions should isolate and properly store cellulose nitrate materials because of their extreme flammability, especially when in a deteriorated condition.

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