On Wed, 22 Sep 2021, Jay Jaeger wrote:
  B/W, CCITT Group 4 tiffs at 400dpi is what I do, but
then I also 
600 DPI should be the absolute mininum today. There is absolutely no
reason to go below that for B/W.
  and notify Al Kossow of an available contribution.
Hasn't worked for me in the past ...
  Bitsavers will post process and create a searchable
PDF 
Since when?
Christian