Drawing
Negatives
Originally, drawings were stored on half plate negatives and subsequently on medium format negatives. After this, aperture card was used. Older individual negatives are usually used for pictorial images.
For
drawing negatives comprising of text and lineart, scanning at one bit
depth to achieve 200 ppi at the finished image size is required. Black
and white photographs require scanning in greyscales usually, at eight
bit depth, resulting in 256 shades of grey. Higher bit depths can be
used if required. Resolution would be to suit the application but may
be quite high.
Individual
Drawing Negatives
Drawing
images sized from up to A0, and larger, have been stored on different
sizes of film. They are known as quarter plate, half plate and medium,
format typically 60 mm. As photo - technology improved, the size of the
negative reduced and these larger sizes were replaced by Aperture Card
(refer below). Hdi scan all sizes of negatives in both lineart and greyscale.
Older
Individual Negatives
Old
negatives may be of any size on glass or film and always in mono. Medium
format (around 60mm) Quarter Plate, Half Plate are typical size. These
usually show pictorial images although Quarter Plate and medium format
were used to record drawing images.
©
2001 Hamilton Ltd - issue 30/10/01