uncoated secrets

peeter marvetmedia hacker

1: contrast

2: volume

3: colorspace

ISOcoated vs uncoated

ISO 12647-2

paper

inks

dot gain

in RGB or CMYK?

1.Original RGB from camera2.Photographer’s adjustments3.Size & paper related adjustments

1.Smaller = seems darker, less vivid2.Uncoated, newsprint = less vivid3.Size & screening = unsharp mask4.preview with target ICC + paperwhite

4.Separation to CMYK1.paper-specific ICC profile2.perceptual intent for uncoated & news

4: color separation

total ink limit 260%

GCR

100% C

0% M

100% Y

100% C

50% M

100% Y

50% C

0% M

50% Y

50% K

GCR

50% 60% 70%

GCR

50% 60% 70%

gray component

GCR

50% 60% 70% 0% 10% 20% 50%

GCR

50% 60% 70% 0% 10% 20% 50%

= 180% = 80%

problems:

total ink limit 300%

UCR

colormanagement.org

5: screening

133lpi

(150lpi?)

133lpi 175lpi

dot gain 18% -> 23%

dot gain +5%

1: contrast2: volume

3: color space4: color separation

5: screening

Thnks!