1 files changed, 13 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 57e3cf6..f215ec4 100644
--- a/Makefile
+++ b/Makefile
@@ -17,4 +17,17 @@ publish:
 lint-markdown:
 	@mdl --ignore-front-matter --style .mdl.rb */*.qmd */*/*.qmd
 
+$(patsubst %_offset.pdf,%_offset_cmyk.pdf,$(wildcard _site/tryk/*_offset.pdf)):\
+ %_offset_cmyk.pdf: %_offset.pdf
+	gs -dSAFER -dBATCH -dNOPAUSE \
+	 -sDEVICE=pdfwrite \
+	 -dPDFSETTINGS=/prepress \
+	 -sOutputFile=$@ \
+	 -dProcessColorModel=/DeviceCMYK \
+	 -sColorConversionStrategy=CMYK \
+	 -sColorConversionStrategyForImages=CMYK \
+	 -sDefaultRGBProfile=/usr/share/color/icc/sRGB2014.icc \
+	 -sDefaultCMYKProfile=/usr/share/color/icc/PSO_Uncoated_ISO12647_eci.icc \
+	 $<
+
 .PHONY: all preview render publish lint-markdown