Here are 2 examples of 600 dpi scans. The first one is full resolution. The second one is descreened.
Full res 600 dpi scan – 1.20MB
Descreened 600 dpi scan – 561kb
All descreening does is blur the halftone image and cut the size by about 55%. I sometimes do both types of scans depending on use. If you are putting it online, test it out to see how a full res image looks. If you got bad moiré, then you have to descreen it. You always have to check these things out…it tells you…you don’t tell it!
And testing just doesn’t go for online use. If you plan to print it, you gotta test as well.
Here is a recent example that needed to be descreened. I was using this for a RPPC mailing. I tried it as a 600 dpi, 800 dpi and 1200 dpi and they all looked terrible printed…so I got my answer as to whether to descreen or not.
300 dpi scan descreened
Selection from Folies Bergère Archive – Daniel D. Teoli Jr. Archival Collection
Over the decades I’ve produced hundreds and hundreds of thousands of scans. (Maybe ‘scanner’ should be my middle name?) In fact I love scanners so much and hate studio work, I even use scanners in place of a studio camera if I can get away with it.
Flatbed scanned components of The 3 Graces…
…the earliest extant all girl lesbian film known.
Daniel D. Teoli Jr. Small Gauge Film Archive
To produce the bulk of my scans I mainly use a sheetfed scanner. With sheetfed scanning I can easily produce a thousand or more scans a day. But I use all sort of scanners and methods of reproduction. My favorite for quality is the flatbed scanner. But sheetfed scanners also produce decent work. And if I can’t fit it on my large format 11×17 inch flatbed scanner, it is the copy stand with vacuum easel.
Here is a rundown on some of the scanning and copy stand methods compared…
Daniel D.Teoli Jr. Archival Collection
Daniel D.Teoli Jr. Small Gauge Film Archive
Daniel D.Teoli Jr. Advertising Archive
Daniel D.Teoli Jr. VHS Video Archive
Daniel D.Teoli Jr. Audio Archive
Daniel D.Teoli Jr. Social Documentary Photography