Quick answer: buyers choosing additives for in-mold label inks usually get a faster first shortlist when they separate three different additive jobs instead of asking one product to solve every label-printing problem at once. CHLUMIWE® 2100 should move first when the main problem is film-surface wetting, spread, or cleaner laydown on smooth or treated in-mold-label stock. CHLUMIAG® 3501 deserves earlier review when the buyer needs a broader anti-sticking, print-side handling, or downstream label-handling compatibility route. CHLUMIAF® 3062 belongs earlier when the system already looks directionally right but foam, entrained air, or circulation-side instability keeps damaging consistency.
That is the commercially useful split. This page is not another broad label-ink overview. It is a narrower CHLUMICRYL® application page for buyers who already know the project is an in-mold label ink job and need a faster first screen before requesting samples.
Why in-mold label inks deserve their own additive page
Longchang already has live pages for label ink additives, shrink sleeve ink additives, flexographic ink additives, and gravure ink additives. Those pages answer broader label, film-label, or process questions.
An in-mold-label project creates a tighter buyer question: is the first additive decision mainly about getting the ink to wet and spread on a smoother filmic label surface, about improving print-side anti-sticking and stack handling before the next packaging step, or about suppressing foam and trapped air during manufacture and press use? That is a different application question because in-mold labels usually sit close to film-based label stock, high-quality graphics, and downstream handling pressure where the printed surface still has to stay workable.
The broader industry framing here is conservative. External in-mold-label references commonly treat substrate surface energy, print quality on filmic labels, and handling stability as practical decision points. The product-specific facts below still stay tied to current Longchang-supported product pages.
What the current company-supported facts already separate
- CHLUMIWE® 2100 is supported by Longchang as a multi-component modified polydimethylsiloxane wetting agent with recommended dosage at 0.1% to 1.0% of total formulation, addition during grinding, stirring, or after production, optional solvent pre-dilution, and applicability across UV, solvent, and water-based systems. The supported page also places it in the broader printing inks / packaging coatings lane.
- CHLUMIAG® 3501 is supported by Longchang as a multi-component modified polysiloxane that can be added at any stage and used across UV, solvent, and water-based systems. The current company-supported page directly lists printing inks, inkjet inks, overprint varnishes, release coatings, and anti-sticking-agent use.
- CHLUMIAF® 3062 is the defoamer-first route. Longchang supports it for printing inks with a recommended dosage of 0.1% to 0.5% of total formulation, broad UV, solvent, and water-based applicability, and the practical watchpoint that if solvent dilution is used, stability and defoaming performance should be tested first.
That is enough product-level separation to build a real shortlist for in-mold label inks without inventing unsupported molding, migration, or regulatory claims.
Quick comparison table: which route deserves the first screen?
| Buyer priority in in-mold label inks | Best first route | Why it belongs first | Main watchpoint |
|---|---|---|---|
| Poor film-label contact, weak spread, or a drawdown that still looks like a wetting-first problem | CHLUMIWE® 2100 | Longchang supports it as a wetting route with a clear dosage window and system fit across UV, solvent, and water-based systems in the printing-inks and packaging-coatings lane | Keep the first screen focused on wetting and spread instead of expecting one additive to solve every downstream handling issue |
| Broader anti-sticking pressure, print-face handling, or stacked-label compatibility after printing | CHLUMIAG® 3501 | The product page directly combines printing-ink use with overprint varnishes, release coatings, and anti-sticking-agent positioning | Because it is a broader compatibility route, define the real KPI before screening so the result stays interpretable |
| Persistent foam, entrained air, or circulation-side instability during ink manufacture, letdown, or printing | CHLUMIAF® 3062 | Longchang directly supports it as a printing-ink defoamer with a dedicated dosage window and broad system applicability | If solvent dilution is used, stability and defoaming performance should be checked before scale-up |
When CHLUMIWE® 2100 is the better first move
2100 should move to the front when the in-mold-label project still looks like a wetting and spread problem. This is often the cleaner first route when smooth filmic label stock is not accepting the ink the way the team expects, the drawdown still shows weak first contact, or the lab needs a simpler benchmark before moving into broader anti-sticking and handling tradeoffs.
The current Longchang page gives 2100 a useful operating window for that job. It supports 0.1% to 1.0% dosage, can be added during grinding, stirring, or after production, and can be diluted with water, alcohols, alkanes, and aromatics. The same page also places it in the printing-inks and packaging-coatings product lane.
- Best first-screen use: film-label wetting, spread, and initial laydown screening on smoother in-mold-label surfaces
- Dosage guidance: 0.1% to 1.0% of total formulation
- System fit: UV, solvent, and water-based systems
- Commercial reason to shortlist it: it gives a cleaner first answer when the buyer still needs basic substrate contact to improve before testing broader anti-sticking or foam-control routes
In short, 2100 is the better first move when the real question is still how the ink meets the label surface.
When CHLUMIAG® 3501 is the better first move
3501 deserves earlier review when the project is no longer only about first contact. It is the stronger route when the buyer needs a broader anti-sticking, release-oriented, or print-side compatibility path that can still sit naturally inside an in-mold-label ink branch.
The current Longchang page is clear here. 3501 is not only listed for printing inks; it is also publicly positioned for inkjet inks, overprint varnishes, release coatings, and anti-sticking-agent use. It can be added at any stage and used across UV, solvent, and water-based systems.
- Best first-screen use: broader print-side handling questions, including anti-sticking, release behavior, and stacked-label or downstream handling compatibility
- Addition logic: can be added at any stage or later
- System fit: UV, solvent, and water-based systems
- Commercial reason to shortlist it: it is the cleaner route when the buyer needs a wider print-and-handling compatibility path instead of only a wetting correction
That makes 3501 the better first move when the problem sits more in handling, stacking, or next-step label compatibility than in basic spread.
When CHLUMIAF® 3062 is the better first move
3062 should move first when the in-mold-label ink project already has a plausible wetting route but the system keeps failing because of foam, entrained air, or poor process stability. That is a different job from improving first contact or tuning print-side handling. It is also one that can waste a lot of development time if the team keeps screening more surface additives before solving the foam problem.
Longchang supports 3062 as a polyether-modified polysiloxane defoamer for printing inks, with a recommended dosage at 0.1% to 0.5% of total formulation and applicability across UV, solvent, and water-based systems. The product page also adds a practical note: if solvent dilution is used, the team should first verify stability and defoaming performance.
- Best first-screen use: foam control, air-release management, and process-side stability in in-mold-label ink workflows
- Dosage guidance: 0.1% to 0.5% of total formulation
- System fit: UV, solvent, and water-based systems
- Main caution: test solvent-dilution stability before scale-up if dilution is part of the process plan
So 3062 is the better first move when the project is being limited by gas management, not by missing wetting or print-side compatibility.
How buyers should choose before requesting samples
1. Start with the first visible bottleneck
If the film-label surface still is not accepting the ink cleanly, start with 2100. If the real issue is broader anti-sticking, handling, or downstream label compatibility, move 3501 earlier. If the project is already being damaged by foam or trapped air, move 3062 up.
2. Keep the label workflow visible
This page is intentionally narrower than the broader label-ink and shrink-sleeve direction. An in-mold-label job carries more pressure around smooth film surfaces, stacked printed labels, and keeping the print face practical for the next handling step. That makes the first additive screen more application-specific than a general label page.
3. Do not force a defoamer into a wetting job
If the buyer has not yet solved basic substrate contact, a wetting-first route usually teaches more than jumping straight to a defoamer. The opposite is also true: once the real problem is foam and air release, a new wetting additive may only add noise to the first screen.
4. Use the watchpoint, not only the headline benefit
2100 is broad, but that does not mean it is the best first route for every downstream issue. 3501 offers a wider handling and compatibility route, but the KPI still needs to stay clear. 3062 can be diluted, but the team should verify stability and defoaming first. Those practical notes often decide the better first sample more than the product family name.
5. Keep the first round tight
For many buyers, one wetting route, one broader print-side handling route, and one defoamer-first route teach more than screening too many nearby additives at once.
Recommended Longchang path from this page
- Cluster overview: CHLUMICRYL® Coating and Ink Additives
- Related application page: How to Choose Additives for Label Inks
- Related application page: How to Choose Additives for Shrink Sleeve Inks
- Related process page: How to Choose Additives for Flexographic Inks
- Related process page: How to Choose Additives for Gravure Inks
- 2100 product page: CHLUMIWE® 2100
- 3501 product page: CHLUMIAG® 3501
- 3062 product page: CHLUMIAF® 3062
FAQ
Which additive should I screen first if an in-mold label ink is not spreading cleanly?
Usually CHLUMIWE® 2100, because it is the cleaner wetting-first benchmark when the real problem is film-label surface contact and spread.
When should 3501 move ahead of 2100?
3501 should move ahead when the ink already wets reasonably well but the project still needs a broader anti-sticking, handling, or downstream label-compatibility route.
When should 3062 move ahead of the other two?
3062 should move ahead when persistent foam, entrained air, or process-side instability is the main barrier to acceptable print quality or manufacturing stability.
Does this page make molding-performance or compliance claims?
No. This page stays focused on additive-selection logic for in-mold-label ink workflows. Any molding validation, migration review, or regulatory qualification needs separate formulation and application testing.
Can one of these additives solve every in-mold-label ink issue?
No. Their supported first-screen logic is different enough that buyers should not treat them as interchangeable. The faster route is to identify whether the problem starts at wetting, handling compatibility, or foam control.
Need a faster shortlist for in-mold label inks?
If your team is stuck between film-surface wetting, print-side anti-sticking and handling, and foam control, define the real first-screen job before requesting samples. That usually shows much faster whether CHLUMIWE® 2100, CHLUMIAG® 3501, or CHLUMIAF® 3062 deserves the first round.