Mircrographics Flashcards
What are micrographics?
The science or art of recording images on microfilms using photographic techniques
What are micrographics used for? (3)
Storing, retrieving and preserving long term data
What do the terms microforms/microimages mean?
Generic term for various forms of microfilm
What does microfilm mean?
fine-grain high resolution film that records images greatly reduced in size
What are the two types of polarity in microfilm and which is more common?
Negative (white on black)
Positive (black on white)
Negative for film itself, positive on printouts
What are some of the uses of microfilm since its invention? (8)
microdots carrier pigeons inventors checkograph universal library newspapers V-mail general business
What are some of the advantages of using micrographics? (10)
- Low cost storage
- Space savings
- Preservation of essential files
- lncreased productivity
- Easy retrieval
- easy to copy and reprint
- less damaging than scanning
- Retains file order
- Admissible in court
- More durable
What are the limitations of micrographics? (4)
Need a printer/reader
Size or camera restrictions
Updating difficult
Costs of equipment & personnel
What is the rule of thumb?
Only make microforms if you need records for more than 10 years
what are the two main types of micrographics?
Serialized
Unitized
What are some types of serialized micrographics? (3)
Open reel
Catridges or Magazines
Cassettes
What are some types of unitized micrographics? (5)
Aperature cards Card Jackets Microjackets microfiches Nonstandard (chips, scroll)
How is the size of a micrographic expressed?
As a reduction ratio, how many times smaller than the original
What are the 5 image orientations?
Cine mode Comic mode Duplex mode Duo mode Duplex/Duo mode
What the four types of cameras used in micrographics?
Rotary
Planetary
Step and repeat
Com recorder
What are the five types of readers?
Microfiche Microfilm Microfilm scanner High speed scanners Lightbox
What are the five ways to encode micrographics and why use them?
Sequential numbers Flash targets Barcoding Odometer index Blip coding
To make it easier to find specific info
What should you consider when making micrographics? (9)
Will it be done in-house Quality Legal acceptability Production time File integrity Security Standards Training Space
What two things should you do when deciding on micrographics?
Cost benefit analysis
Feasibility Study
Why are micrographics still used? (6)
Takes up less space Lower costs More permanent Simple process Mature product Legality is established
