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CTP Workflow
- Overlay Editorial and Advertising components of a page:
pdftk editorial.pdf stamp ad.pdf output complete_page.pdf
- 2-up broadsheet pages
--noautoscale true
prevents scaling the source PDFs if the output size is bigger/smaller.pdfjam --nup 2x1 --suffix 2up --papersize '{23in,22.5in}' \
--noautoscale true --outfile ./2-up_page.pdf \
righthand_odd_page.pdf lefthand_even_page.pdfOffset them a bit to move them off the top of the page:
pdfjam --noautoscale true --nup 2x1 \
--offset '0in -0.125in' --papersize '{34in,23in}' \
--outfile ./2-up-page.pdf \
righthand_odd_page.pdf lefthand_even_page.pdf - 1-bit TIFF separations - 85lpi halftone screen, 1200x1200 dpi resolution:
gs -sDEVICE=tiffsep1 -dNOPAUSE -dBATCH -dSAFER -r1200x1200 \
-dCOLORSCREEN -dDITHERPPI=85 \
-sOutputFile=separated_%02d.tif inputfile.pdf - Convert 1-bit TIFF separations to grayscale
convert separated\(Black\).tif -compress lzw -depth 8 -colorspace Gray separated-Black.tif
convert separated\(Cyan\).tif -compress lzw -depth 8 -colorspace Gray separated-Cyan.tif
convert separated\(Magenta\).tif -compress lzw -depth 8 -colorspace Gray separated-Magenta.tif
convert separated\(Yellow\).tif -compress lzw -depth 8 -colorspace Gray separated-Yellow.tif - Merge the grayscale TIFF files into a composite, halftoned, CYMK image:
convert separated-Cyan.tif \
separated-Magenta.tif \
separated-Yellow.tif \
separated-Black.tif \
-set colorspace CMYK -combine -negate combined.tif
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