Schnelle Antwort: Käufer sollten nicht CHLUMIAG® 2750/2760/2780/2505 as one undifferentiated reactive-silicone family when the project already has a clear first surface-control job. CHLUMIAG® 2750 should move up first when the main question is reverse varnish or a more reactive UV route that becomes fixed into the cured network while still supporting Oberflächenglätte und tape resistance. CHLUMIAG® 2780 should move up first when the buyer is closer to anti-blocking oder anti-graffiti handling in UV or solvent-side work. 2760 und 2505 still matter, but on the current public company page they are better treated as same-family secondary screening options when the 2750 or 2780 route is directionally right and the team then needs a different viscosity window rather than a different chemistry story.
That is the commercially useful split. This page is not another broad anti-blocking or release-coating overview. It is a tighter buyer page for teams already inside the CHLUMICRYL® branch who need to choose the right reactive surface-control lane faster.
Why this page deserves to exist beside the broader CHLUMICRYL® pages
Longchang hat bereits Live-Seiten für CHLUMICRYL® Beschichtungs- und Druckfarbenadditive, release-coating additive selection, Antiblockmittel, Anti-Graffiti-Zusätzeund UV varnish surface controlDiese Seiten helfen Käufern bei der Auswahl des richtigen Produkts. application lane or additive family.
This page answers a narrower decision that comes after that: if the reactive 2750-family chemistry is already the likely direction, should the first sample move toward 2750 for reverse-varnish work or toward 2780 for anti-blocking and anti-graffiti handling?
That narrower question is worth its own page because it reduces overlap with the broader function articles and helps strengthen a more product-centered internal-link path back to Longchang’s reactive-surface-control family.
What the current company-supported facts actually say
The current Longchang product page gives one shared family foundation for 2750, 2760, 2780, and 2505:
- the family is described as a multi-component modified polydimethylsiloxane,
- the products are supported for UV-Systeme und Lösungsmittelsysteme, but not for wasserbasierte Systeme,
- the recommended dosage is 0.1% to 3% of the total formulation,
- the family can be added at any stage of production or later,
- the page highlights reactive acrylic functional groups and says the additive can crosslink within the polymer network structure, which helps it remain fixed at the coating surface after cure,
- the same family page also supports excellent leveling, Oberflächenglätteund tape resistance.
That shared base matters because it explains why the family appears in several nearby UV and solvent-side surface-control conversations. But the same public company wording also gives the two clearest route-level differentiators for this article:
- 2750 is more suitable for reverse varnish.
- 2780 is more commonly used in anti-blocking and anti-graffiti applications.
That is enough to justify a buyer-selection page, especially because the family also separates physically by viscosity:
- 2750: 1000 to 4000 mPa.s
- 2760: 1000 to 8000 mPa.s
- 2780: 5000 to 30000 mPa.s
- 2505: 4000 to 12000 mPa.s
From a general industry perspective, buyers usually separate release and reverse-varnish control aus anti-blocking and finished-surface separation because the first discussion is often about how the reactive top surface behaves after cure, while the second is more directly about stack handling, contact separation, and easier maintenance or marking resistance. That outside framing is useful for language and structure, but the product claims here still stay grounded in Longchang’s own company-supported page.
Quick comparison table: CHLUMIAG® 2750 vs 2780
| Kaufkriterium | CHLUMIAG® 2750 | CHLUMIAG® 2780 |
|---|---|---|
| Main supported public differentiation | More suitable for reverse varnish | More commonly used in anti-blocking and anti-graffiti applications |
| Shared chemistry lane | Reactive acrylic functional-group route that crosslinks into the polymer network | Reactive acrylic functional-group route that crosslinks into the polymer network |
| Supported systems | UV √, Lösungsmittel √, wasserbasiert × | UV √, Lösungsmittel √, wasserbasiert × |
| Empfohlene Dosierung | 0.1% to 3.0% | 0.1% to 3.0% |
| Key shared performance language | Leveling, surface smoothness, tape resistance | Leveling, surface smoothness, tape resistance |
| Viscosity window | 1000 to 4000 mPa.s | 5000 to 30000 mPa.s |
| Why buyers sample it first | They want a tighter reverse-varnish or reactive UV surface-control screen | They want a stronger anti-blocking or anti-graffiti handling screen inside the same reactive family |
| Hauptbeobachtungspunkt | Do not over-read the whole family as identical just because the chemistry base overlaps | Do not use it as a lazy substitute for a broader anti-blocking page when the real issue is a different additive family entirely |
When CHLUMIAG® 2750 is the better first route
2750 should move first when the buyer already knows the job sits inside a reverse-varnish or release-oriented reactive UV route rather than a broad anti-blocking discussion.
Longchang’s own public wording is the key reason. The family page explicitly says 2750 is more suitable for reverse varnish. The same page also supports the broader reactive story around acrylic functional groups, crosslinking into the polymer network, Oberflächenglätteund tape resistance. That makes 2750 the cleaner first conversation when:
- the line is already focused on reverse-varnish behavior,
- the team wants a route that sounds more like reactive UV surface fixation than general anti-blocking,
- the project still values leveling and smoothness as part of the surface package, and
- the buyer wants a more product-specific next step after reading the broader release-coating article.
The viscosity window also helps the shortlist logic. At 1000 to 4000 mPa.s, 2750 sits at the lower end of this public family range, which makes it the more natural first anchor when the application discussion is already centered on the 2750 route itself rather than on the broad family label.
When CHLUMIAG® 2780 is the better first route
2780 should move ahead when the buyer’s real first KPI is anti-blocking oder anti-graffiti handling in a UV or solvent-side coating, ink, or varnish program.
Again, the strongest reason is directly company-supported. The current Longchang page says 2780 is more commonly used in anti-blocking and anti-graffiti applications. That gives 2780 a cleaner first-screen role than 2750 when the project is less about reverse varnish and more about how the cured surface behaves under contact, stacking, easier cleaning, or downstream handling.
2780 usually deserves earlier attention when:
- the first complaint is blocking after contact or surface grab during handling,
- the team is already inside the anti-graffiti or easy-clean branch and wants to stay in a reactive family,
- the buyer wants a tighter next step after the broader anti-blocking oder anti-graffiti pages, and
- UV or solvent-side system fit is already acceptable but the surface still needs a more application-led family member.
The public viscosity window is also higher at 5000 to 30000 mPa.s. That does not, by itself, prove one finished-film result is always better than another, but it does support treating 2780 as a meaningfully different family screen instead of pretending the whole line is interchangeable.
Where 2760 and 2505 still fit
This is the part buyers often need stated plainly. On the current public Longchang page, 2760 und 2505 do nicht receive the same explicit application notes that separate 2750 and 2780. That means a careful buyer should avoid inventing a harder product-story split than the company page actually supports.
The more defensible use of 2760 and 2505 is as same-family secondary screening options once the team already knows which main route is directionally correct:
- 2760: public viscosity range 1000 to 8000 mPa.s, useful as an intermediate same-family screen when the 2750-style route is directionally right but the team wants another processing window.
- 2505: public viscosity range 4000 to 12000 mPa.s, useful as another middle-family screen when the chemistry lane is right and the buyer needs a different family member before changing additive direction entirely.
That is not weak positioning. It is honest positioning. In B2B formulation work, a product family often does not need four separate marketing stories to be commercially useful. Sometimes the right move is to choose the first job correctly with 2750 or 2780, then use 2760 or 2505 to tune the family screen rather than to restart the shortlist from zero.
Wie Käufer vor der Anforderung von Mustern auswählen sollten
1. Start with the real first job, not the family label
If the first job is reverse varnish, start with 2750 earlier. If the first job is anti-blocking or anti-graffiti, start with 2780 earlier. The public company page gives exactly that split, so use it.
2. Keep system boundary visible
This family is supported for UV und Lösungsmittel systems, not wasserbasiert systems. If the project has already shifted into a water-based conversation, this is probably the wrong family to lead the first screen.
3. Use 2760 and 2505 as secondary screens, not invented headline products
Because the current public company page mainly separates them by viscosity, use them after the main route is chosen rather than pretending they each have a fully separate public application story.
4. Do not collapse reverse varnish, anti-blocking, and anti-graffiti into one vague target
Those jobs overlap, but they are not identical buying triggers. That is exactly why 2750 and 2780 both deserve a place in the cluster.
5. Keep the first lab round short
For many teams, the cleanest first round is one 2750-led reverse-varnish route and one 2780-led anti-blocking or anti-graffiti route. If one of those wins directionally but still needs formulation-window adjustment, then bring 2760 or 2505 into the second round.
Empfohlene Route nach Longchang von dieser Seite
- Clusterübersicht: CHLUMICRYL® Beschichtungs- und Druckfarbenadditive
- Zugehörige Anwendungsseite: How to Choose Release Coating Additives for UV Inks and Overprint Varnishes
- Zugehörige Funktionsseite: Wie man Antiblockmittel für Beschichtungen und Druckfarben auswählt
- Zugehörige Funktionsseite: Wie man Anti-Graffiti-Zusätze für Beschichtungen auswählt
- Related UV surface page: Oberflächenkontrolladditive für UV-Lacke und Überdrucksysteme
- Product family page: CHLUMIAG® 2750/2760/2780/2505
FAQ
Which product is the stronger first screen for reverse varnish?
Usually CHLUMIAG® 2750, because the current Longchang family page explicitly says 2750 is more suitable for reverse varnish.
When should buyers choose 2780 before 2750?
Choose 2780 earlier when the project is more directly about anti-blocking oder anti-graffiti handling in UV or solvent-side systems than about reverse varnish.
Are 2760 and 2505 separate product stories or just family variants?
On the current public company page, they are better treated as same-family variants with different viscosity windows unless more detailed company-supported application differentiation is confirmed elsewhere.
Can this page replace the broader release-coating or anti-blocking guides?
No. Those pages are still the right first stop when the team is choosing an additive family or application lane. This page is for the narrower decision inside the 2750-family reactive route.
Need a faster shortlist inside the 2750 family?
If your UV or solvent-side program is stuck between a reverse-varnish reactive route and an anti-blocking or anti-graffiti handling route, do not treat every family member as interchangeable. Start with 2750 for reverse varnish und 2780 for anti-blocking or anti-graffiti, then use 2760 or 2505 only if the winning direction still needs a different same-family processing window.