What type of film is microfilm?
What type of film is microfilm?
Microfilm or roll film is wound onto a standard size spool or reel. Reels can accommodate up to 125 linear feet of 4 or 5 millimeter-thick microfilm. Roll film comes in standard widths of 16mm and 35mm. Rarely, 105mm film is used for architectural drawings or blueprints with one image per frame.
Is microfilm a hazardous waste?
Silver microfiche may be hazardous; do not put it in the garbage. Shred small quantities of vesicular microfiche using a medium-duty office shredder. This may be necessary for microfiche that contains medical records, security data or other sensitive information. Place the shreds in the trash bin.
What is the difference between microfilm and microfiche?
Microfilm is a roll of images, much like a movie reel, while microfiche is a flat sheet of microfilm. Because the documents are usually reduced to about 1/25 their normal size, microform storage can easily store thousands of documents without taking up much space.
What is diazo microfilm?
Diazo microfilm (Estar Base) is a fast-speed non-silver print film suitable for generating direct-duplication copies in fiche or roll form from silver or reprintable diazo films.
What are the types of microforms?
Microform materials exist in one of four forms:
- Micro-opaque: 6″ X 9″ opaque sheet.
- Microcard: 3″ X 5″ opaque card.
- Microfiche: 4″ X 6″ or 3″ X 5″ film sheets, each holding 40 to 98 pages.
- Microfilm: 16mm or 35mm film on reels, usually 100 feet in length.
Is microfilm a primary source?
Primary sources are the raw materials of historical research – they are the documents or artifacts closest to the topic of investigation. You may find primary sources in their original format (usually in an archive) or reproduced in a variety of ways: books, microfilm, digital, etc.
Can you shred microfiche?
The plastic film cannot be shred in just any machine and requires a shredder with multimedia capabilities. Level 6 security destruction is required for top secret information stored on microfiche, x-ray, and other forms of film.
What is microfilm made of?
Microfilm is comprised of a plastic support (nitrate, acetate, or polyester) with a silver-gelatin emulsion. It is typically unperforated 16mm or 35mm roll film. A larger 105mm was used for the transfer to preservation microfiche, but it is only occasionally found in collections.
What is Micro document?
Microforms are scaled-down reproductions of documents, typically either films or paper, made for the purposes of transmission, storage, reading, and printing. Microcards, also known as “micro-opaques”, a format no longer produced, were similar to microfiche, but printed on cardboard rather than photographic film.
Is microfilm still used?
As long as documents have existed the need to preserve them has existed. So, the answer is YES, we still need microfilm today! Microfilm was designed to have a stable life of 500 years, with proper storage. Because of these qualities, over the years trillions of records have been safely stored on microfilm.
What Is Silver microfilm?
Silver gelatin (or silver halide) film is the film type used for master negative microforms, and is the only microform medium appropriate for archival purposes. The master silver- gelatin microfilm is almost always a negative image, from which positive or negative duplicates can be made.
What are the uses of microforms?
Microforms are scaled-down reproductions of documents, typically either films or paper, made for the purposes of transmission, storage, reading, and printing. Microform images are commonly reduced to about 4% or one twenty-fifth of the original document size.