Quick answer: For practical formulation work, photoinitiator screening starts with the light source and film build, then checks yellowing, adhesion, and cure completeness under real production conditions.
UV-diepdrukinkt en referentieformule
De viscositeit van diepdrukinkt is erg klein, meestal in het bereik van 20-300 mPa-s, om ervoor te zorgen dat de inkt goede overdrachtprestaties heeft en een uitstekende afdrukkwaliteit krijgt. Diepdruk kan worden gebruikt in een breed scala aan toepassingen, zoals papier, film, aluminiumfolie, enz. en de druksnelheid is hoog (meestal 100-300 m/min). Door de dikke inktlaag van diepdrukinkt is het pigmentgehalte in de inkt relatief laag, over het algemeen 6% tot 9%.
UV gravure printing ink is close to UV flexo printing ink in formulation design, using low viscosity, fast-curing oligomers and active diluents. In practice, Fotoinitiator 819 is often reviewed for through-cure, while ACMO monomeer helps balance reactivity, flexibility, and viscosity; see section 3.5 UV flexo printing ink in Table 3-38, Table 3-39 and Table 3-4, and the selection of photoinitiators in “3.4 UV Offset Printing Ink”.
(1) UV-diepdrukinkt referentieformule
Polyester tetraacrylaat (EB657) 30,0
Styreen-maleïnezuuranhydridecopolymeer (SMA1440F) 10,0
(EO)4(PET)4A (SR494) 17,0
819 4.9
Blauw pigment (LGLP) 5,0
Talk (D2002) 20,1
Braziliaanse carnaubawas 3.0
Oppervlakteactieve stof 4.0
Gesulfoneerde ricinusolie 2,0
Dibutyl sebacaat 3,0
UV-stabilisator 1.0
(2) UV-rode diepdrukinkt referentieformule
Hexafunctionaliteit PUA 3
Difunctionaliteit PEA 5
DTMPTA 18
PETA 30
Acrylmorfoline ACMO 10
NPGDA 12
Polymerisatie-inhibitor (510) 0,1
1173 4
369 2.5
Polyethyleenwas 1,5
Hydrofoob pyrogeen kiezelzuur 1
Pigment (Lysol Red) 12
Nivelleringsmiddel zonder siliconen 0,4
Siliconenvrije ontschuimer 0,5
(3) UV gele diepdrukinkt referentieformulering
Hexafunctionele PUA 4
Difunctionaliteit PEA 5
DTMPTA 25
PETA 26
Acrylmorfoline ACMO 10
NPGDA 12
Polymerisatie-inhibitor (510) 0,1
1173 4
369 2
Polyethyleenwas 1
Hydrofoob pyrogeen kiezelzuur 1
Pigment (benzidinegeel GR) 9
Nivelleringsmiddel zonder siliconen 0,4
Siliconenvrije ontschuimer 0,5
(4) UV blauwe diepdrukinkt referentieformule
Hexafunctionaliteit PUA 5
Multifunctionaliteit PEA 3
DTMPTA 30
PETA 18
Acryloylmorfoline ACMO 14
NPGDA 8
Polymerisatie-inhibitor (510) 0,1
1173 5
369 3
Polyethyleenwas 1
Hydrofoob pyrogeen kiezelzuur 1
Pigment (ftalocyanine blauw BX) 11
Nivelleringsmiddel zonder siliconen 0,4
Siliconenvrije ontschuimer 0,5
(5) UV-gravure verhelderende olie referentieformulering
Polyurethaanbisacrylaat 38,11
Hexyleenglycoldiacrylaat 27,64
Gasil EBC (handelsnaam) 8,59
benzofenon 2,83
N-methyldiethanolamine 2,83
De bovenstaande UV-diepdrukvernisformules worden vaak gebruikt voor het vernissen van houtnerfpapier voor meubels, enz.
A practical selection route for photoinitiator-related projects
When technical buyers or formulators screen photoinitiators, the most useful decision frame is usually cure quality plus application fit: which package cures reliably, keeps appearance acceptable, and still works under the lamp, film thickness, and substrate conditions of the actual process.
- Match the package to the lamp first: mercury lamps, UV LEDs, and visible-light systems can rank the same photoinitiators very differently.
- Check depth cure and surface cure separately: a film that feels dry on top can still be weak underneath.
- Balance yellowing with reactivity: the strongest deep-cure route is not always the best commercial choice if color or migration risk becomes unacceptable.
- Use the final formula as the benchmark: pigment load, monomer package, and film thickness can all change the apparent ranking of the same initiator.
Recommended product references
- CHLUMINIT 819: Useful when a formulation needs stronger absorption and deeper cure support.
- CHLUMINIT 1173: A practical comparison point for classic short-wave UV initiation.
- CHLUMINIT BP: A practical type-II benchmark when benzophenone chemistry is under review.
- CHLUMICRYL TMPTA: A standard reactive monomer benchmark when stronger crosslink density is required.
FAQ for buyers and formulators
Why are blended photoinitiator packages so common?
Because one product may control yellowing or lamp fit well while another improves cure depth or line-speed performance, so the full package is often stronger than any single grade.
Should incomplete cure always be solved by adding more initiator?
Not automatically. The real limitation may be the lamp, film thickness, pigment shading, or the rest of the reactive system rather than simple under-dosage.