As for unillustrated
paper book, 18 cm x 25 cm, 464 pages, 29 fascicules x 16 octavo sheets = 464 pages
The best
options to get a PDF file of high quality and small size (light weight):
Tiff
Black &
White
300 DPI
Brightness 195
(or) 200 of 255, and not (128) at all
Brightness
degree likes the eye concealer, whenever it became high, whenever it covered
the brown & yellow spots & shadows in the old paper.
So,
increasing brightness of (white) background, and therefore decreasing boldness
of (black) letters & words, give a pure page, also a lesser size of scanned
paper.
The only problem in the (High)
brightness is with the letters which are not full (enough & well) of black
ink (the wiped old words). Increasing brightness (degree) effaces them.
As
for contrast between black & white, it is adjusted automatic.
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