Summary
Samenvatting speciale inkten
- Course
- Institution
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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Les 1: PP – VeredelenSpeciale 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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