빠른 답변: 구매자는 ~해서는 안 됩니다 CHLUMIAG® 2750, 2760, 2780, and 2505 as four unrelated reactive additives. The current Longchang family page supports one shared reactive route with 반응성 아크릴 작용기, radiation-curing suitability, 그리고 crosslinking into the polymer network structure. The first real split is usually this: 2750 should move up first when the project is closer to 역광택 or a reactive UV route where surface smoothness and tape resistance matter. 2780 구매자가 더 가까워지면 먼저 움직여야 합니다. 안티블로킹 또는 낙서 방지 handling. 2760 및 2505 are most useful when the buyer has already decided the reactive-family direction is right and now needs a different viscosity window for formulation handling or process fit rather than a different chemistry story.
이 페이지는 더 넓은 페이지보다 폭이 좁습니다. anti-blocking additive guide 그리고 이미 운영 중인 것과는 다릅니다. 2750 vs 2780 comparison. That earlier page helps buyers choose the first reactive direction. This page is the next step for buyers who need to choose the right grade inside the 2750 family.
Why this reactive family needs a dedicated grade-selection page
In many B2B coating and ink projects, the lab first decides on a chemistry direction and only then discovers that the grade window still matters. Longchang’s current public family page already gives enough support for that second-stage decision. The family is positioned for UV 시스템 및 용매 시스템, not for water-based systems, with a recommended dosage of 0.1% to 3% 및 addition at any stage of production. The same page also gives separate viscosity windows for the four grades:
- 2750: 1000~4000 mPa·s
- 2760: 1000~8000 mPa·s
- 2780: 5000~30000 mPa·s
- 2505: 4000~12000 mPa·s
That means buyers can use one page for the first chemistry choice and another page, this one, for the grade-selection and handling-fit choice.
Quick comparison table: when each grade is the better first screen
| 등급 | 최적 첫 번째 적합 | 구매자들이 왜 그것을 후보에 올리는가 | 주요 감시 지점 |
|---|---|---|---|
| 2750 | Reactive UV work closer to reverse varnish and cured-film surface fixation | Longchang explicitly says 2750 is more suitable for reverse varnish and supports the family with reactive acrylic functionality, surface smoothness, and tape resistance | If the project is really anti-blocking or anti-graffiti-led, 2780 is usually the stronger first direction |
| 2760 | Same-family option when the reactive 2750-type route is directionally right but the process needs a broader mid-range viscosity window | Longchang gives 2760 its own 1000 to 8000 mPa.s viscosity band inside the same reactive UV family | The public page does not give it a separate application story as explicit as 2750 or 2780, so it should be chosen honestly as a same-family process-fit grade |
| 2780 | Reactive UV or solvent-side work closer to anti-blocking and anti-graffiti surface control | Longchang explicitly says 2780 is more commonly used in anti-blocking and anti-graffiti applications | If the buyer really needs reverse-varnish-first logic, 2750 is usually the cleaner first route |
| 2505 | Same-family option when the chemistry direction is already right but a higher viscosity window is a better process match | Longchang gives 2505 its own 4000 to 12000 mPa.s viscosity band inside the same reactive family | Like 2760, its strongest current public role is grade-window selection, not a separate headline application story |
What the whole 2750 family shares before you split grades
Before choosing a grade, it helps to remember what the family already shares on the current Longchang page. The family is positioned with 반응성 아크릴 작용기 and is described as crosslinking into the polymer network structure in radiation-curing systems. Longchang also supports the family with 탁월한 수평 조절, 표면 평활도, 그리고 테이프 저항. The family is shown as suitable for UV 시스템 및 용매 시스템, but not for water-based systems. Longchang also says the products can be added at any stage and should be stored sealed, away from high temperature and strong light, with a mix-with-caution note.
That shared base matters because it keeps buyers from over-interpreting the four numbers as four unrelated chemistries. The family decision is usually already made before the grade decision starts.
When 2750 is the better fit
클루미아그® 2750 should move up first when the project is driven by 역광택 or by the desire to use a more clearly framed reactive UV surface-control route. Longchang’s current public wording says 2750은 역광택 처리에 더 적합합니다.. That matters because it gives the grade a distinct first-screen job inside a family where several grades otherwise share the same reactive base story.
2750 also makes sense when the buyer wants the family’s reactive-network fixation, surface smoothness, and tape-resistance story but does not need to start from an anti-blocking or anti-graffiti problem. In practical buying terms, 2750 is the grade to move forward first when the question is, “Which family member is most clearly aligned with reverse-varnish-led UV work?”
When 2780 is the better fit
클루미아그® 2780 should move up first when the coating or ink project is closer to 안티블로킹 또는 낙서 방지 performance. Longchang’s current public family page explicitly says 2780은 차단 방지 및 낙서 방지 용도로 더 일반적으로 사용됩니다.. That is the strongest current company-supported reason to separate it from 2750.
Commercially, that makes 2780 the more logical first screen when the project brief is not about reverse varnish, but about cleaner surface separation, easier handling after contact, or broader easy-clean style performance inside the reactive family. Buyers should still remember that it remains part of the same UV and solvent reactive family rather than a completely different chemistry lane.
When 2760 is the better fit
CHLUMIAG® 2760 matters when the buyer has already decided that the 2750-family reactive route is directionally correct but needs a different viscosity window for process integration. The current Longchang page gives 2760 a 1000~8000 mPa·s viscosity range, which places it above 2750 on the upper end while still staying below the much wider 2780 range.
That does not justify inventing a separate application story. The stronger and safer B2B use of 2760 is as a same-family mid-window option when the reverse-varnish or reactive-surface-control direction is already accepted, but the team wants a different handling window for the formulation or production step.
When 2505 is the better fit
CHLUMIAG® 2505 belongs in the shortlist for the same reason 2760 does, but with a different grade window. Longchang gives 2505 a 4000~12000 mPa·s viscosity range, which makes it a practical same-family option when the buyer wants a higher viscosity band than 2750 and a narrower band than the broad upper reach of 2780.
Again, the safer company-supported position is not to invent a new headline application story for 2505. Its current strength is that it gives a buyer another process-fit grade inside a reactive UV family that already matches the broader commercial job.
구매자가 첫 번째 샘플 라운드 범위를 좁히는 방법
1. Choose the first surface-control job before the grade window
If the project is clearly reverse-varnish-led, start with 2750. If it is clearly anti-blocking or anti-graffiti-led, start with 2780. Only after that should 2760 or 2505 move up as same-family grade-window options.
2. Do not pretend 2760 or 2505 are separate chemistry stories if the public evidence does not support that
The current Longchang page supports distinct application direction most clearly for 2750 and 2780. Use 2760 and 2505 honestly, as grade-window choices inside the family.
3. 시스템 경계를 명확하게 보이도록 유지하십시오.
This family is supported for UV 및 용제 systems, not for water-based systems. If the project is really a water-based route, leave this family early and choose a different branch.
4. Treat storage and handling notes as part of the buying decision
Longchang’s sealed-storage, light-avoidance, and mix-with-caution notes are part of realistic grade selection, especially when the buyer is narrowing a reactive family for production rather than only for a small lab comparison.
5. Use the shortest first sample plan that still teaches something
For many buyers, the cleanest first screen is 2750 or 2780 as the directional grade, then 2760 or 2505 only if the lab needs another viscosity-window option inside that same direction.
이 페이지에서 추천하는 롱창 코스
- Reactive family product page: CHLUMIAG® 2750 / 2760 / 2780 / 2505
- First-direction comparison page: CHLUMIAG® 2750 vs 2780
- Related anti-blocking page: 코팅 및 잉크용 블록 방지 첨가제 선택 방법
- Related release page: How to Choose Release Coating Additives for UV Inks and Overprint Varnishes
- 클러스터 개요: 클로미크릴® 코팅 및 잉크 첨가제
자주 묻는 질문
What is the main difference between CHLUMIAG® 2750 and 2780?
The strongest current public difference is application direction. Longchang says 2750 is more suitable for reverse varnish, while 2780 is more commonly used in anti-blocking and anti-graffiti applications.
When should I choose 2760 instead of 2750?
Choose 2760 when the 2750-family reactive direction is already right but the team wants a broader mid-range viscosity window. Its current public value is process fit inside the same family, not a separate headline application story.
When should I choose 2505 instead of 2780?
Choose 2505 when the reactive family direction is already right and a 4000 to 12000 mPa.s grade window fits the formulation or production plan better. If the real first decision is anti-blocking or anti-graffiti direction, 2780 still moves up first.
Can this family be used in water-based systems?
No. The current Longchang family page shows the 2750, 2760, 2780, and 2505 family as applicable for UV and solvent systems, but not for water-based systems.
Need a tighter grade-selection shortlist?
If your team already knows it wants the reactive CHLUMIAG® 2750 family, stop treating the four grades as if they all solve different chemistry problems. First choose whether the job is reverse-varnish-led 또는 anti-blocking or anti-graffiti-led. Then use 2760 또는 2505 as same-family viscosity-window options when the chemistry direction is already correct and the process still needs finer tuning.