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Samenvatting speciale inkten

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Dit is een samenvatting van de les omtrent speciale inkten. Hopelijk helpt deze je verder bij het instuderen van de leerstof.

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  • November 8, 2021
  • 4
  • 2021/2022
  • Summary
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Les 1: PP – Veredelen

Speciale inkten
Samenstelling:
- Pigmenten
o = kleurstof van de inkt
 Aandeel pigment bepaalt dekking
 Pigmenten worden gewonnen uit mineralen,
planten, dieren of synthetisch gemaakt
 10 – 25%
- Bindmiddelen
o = ‘drager’ van het pigment
 Kunstharsen of plantaardige oliën
 inkten op basis van plantaardige oliën = bio-inkten
(Bvb.: boomhars, lijnolie, sojaolie)
 50 – 70%
 Viscositeit = stroperigheid
• Lage viscositeit: bvb. Water
• Hoge viscositeit: bvb. Honing
- Toevoegingen
o  geven inkt bepaalde eigenschappen zoals gladheid, slijtvastheid, droging…
o Bvb.: was, oplosmiddelen en verdunningsmiddelen



Scratch-off inkt
Wat?
- Inkt afkrassen met munt of vingernagel
- Meest voorkomend: loterij ticket
- Kleurgamma: zilver, goud (dekkende kleuren)

Opmerking
- Substraat ondergrond: gestreken
o Ondergrond: meestal offset (digitaal toont sneller door)
o Hoge dekkracht, dikke inktlaag (zwaar gramgewicht) d.m.v. zeefdruk
o Doorzicht beperken door:
 Zwaarder gramgewicht drukdrager
 Bedrukking beeld met weinig contrast
 Extra: bedrukking van de achterzijde
o Steeds vernis op het drukwerk en daarna scratch-off inkt, om het onderliggend beeld te beschermen




Roel Ottoy CMO3-C 1

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