Print quality

Print quality Light ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Reproduction of colour and details ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INK DEMAND INK DEMAND

Reproduction of color Original Coated paper's colour gamut Uncoated paper's colour gamut Correct dot gain Dot gain too high

Colour impression ,[object Object],[object Object],white light print gloss = surface reflection of white light print-trough print density = coloured light base paper coating layer ink layer

Ink demand ,[object Object],[object Object],[object Object]

Ink demand vs. roughness ,[object Object],[object Object],[object Object],[object Object],matt silk grades

Dot gain ,[object Object],[object Object],40% dot on plate 60% dot on paper  20% dot gain

Dot gain vs screen ruling - an example

Dot gain ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Dot gain - an example Galerie Fine Gloss 115 g Galerie Brite 70 g Galerie Lite 45 g

Trapping ,[object Object],[object Object],[object Object],+ = + = + = Ideal situation ~70% of magenta is transferring ~70% of cyan is transferring

Trapping - an example (50x magnification) + = Offset Cyan 100% Magenta 100% Cyan + Magenta 200% + = Gravure Cyan 100% Magenta 100% Cyan + Magenta 200%

Formation of print gloss ,[object Object],[object Object],[object Object],uncoated single coated

Formation of print gloss ,[object Object],[object Object],[object Object],double coated silk double coated gloss

Effect of ink on print gloss ,[object Object],[object Object],10 commercial heatset inks printed on double coated gloss paper (laboratory)

Visual impression of gloss ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Print quality - a summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Print quality

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