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.
Tinta gravure UV dan formula referensi
Viskositas tinta cetak gravure sangat kecil, biasanya berkisar antara 20-300mPa-s, untuk memastikan bahwa tinta memiliki performa transfer yang baik, dan mendapatkan kualitas cetak yang istimewa. Pencetakan gravure dapat digunakan dalam berbagai aplikasi, seperti kertas, film, aluminium foil, dll., Dan kecepatan pencetakannya cepat (umumnya 100-300m/menit). Karena lapisan tinta gravure yang tebal, kandungan pigmen dalam tinta relatif rendah, umumnya pada 6% hingga 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, Pemrakarsa Foto 819 is often reviewed for through-cure, while ACMO Monomer 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) Formula Referensi Tinta Gravure UV
Poliester tetraakrilat (EB657) 30,0
Kopolimer stirena-maleat anhidrida (SMA1440F) 10.0
(EO)4(PET)4A (SR494) 17.0
819 4.9
Pigmen biru (LGLP) 5.0
Talk (D2002) 20.1
Lilin carnauba Brasil 3.0
Surfaktan 4.0
Minyak jarak tersulfonasi 2.0
Dibutyl sebacate 3.0
Penstabil UV 1.0
(2) Formula referensi tinta gravure merah UV
Heksafungsionalitas PUA 3
Difungsi PEA 5
DTMPTA 18
PETA 30
Acrylmorpholine ACMO 10
NPGDA 12
Penghambat polimerisasi (510) 0,1
1173 4
369 2.5
Lilin polietilen 1,5
Silika pirogenik hidrofobik 1
Pigmen (Lysol Red) 12
Bahan perata bebas silikon 0,4
Penghilang busa bebas silikon 0,5
(3) Formulasi Referensi Tinta Gravure UV Kuning
Hexafunctional PUA 4
Difungsi PEA 5
DTMPTA 25
PETA 26
Acrylmorpholine ACMO 10
NPGDA 12
Penghambat polimerisasi (510) 0,1
1173 4
369 2
Lilin polietilen 1
Silika berasap hidrofobik 1
Pigmen (benzidin kuning GR) 9
Bahan perata bebas silikon 0,4
Penghilang busa bebas silikon 0,5
(4) Formula referensi tinta gravure biru UV
Hexafunctionality PUA 5
Difungsi PEA 3
DTMPTA 30
PETA 18
Akrilamorfolin ACMO 14
NPGDA 8
Penghambat polimerisasi (510) 0,1
1173 5
369 3
Lilin polietilen 1
Silika berasap hidrofobik 1
Pigmen (phthalocyanine blue BX) 11
Bahan perata bebas silikon 0,4
Penghilang busa bebas silikon 0,5
(5) Formulasi Referensi Minyak Pencerah Gravure UV
Poliuretan bis akrilat 38,11
Heksilena glikol diakrilat 27,64
Gasil EBC (nama dagang) 8,59
Benzofenon 2,83
N-metildietanolamina 2,83
Formulasi pernis gravure UV di atas, sering digunakan untuk pernis kertas serat kayu untuk furnitur, dll.
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.