Quick answer: buyers should not treat CHLUMIAF® 094, CHLUMIAF® 303, and CHLUMIAF® 3062 as interchangeable defoamers. 094 belongs earlier when the project is clearly water-based and the team can work with a pre-dilution-first route at a very low use level. 303 becomes the cleaner first screen when the buyer still stays in waterborne systems but wants a route that can be added during production and is framed more broadly around printing pastes and general water-based processing. 3062 should move ahead when one shortlist has to cover UV, solvent, and water-based coatings or inks instead of only an aqueous line.
That is the practical buyer split. This page is narrower than the already-live defoamer function guide and also different from the cross-function comparison at 3071 vs 3345 vs 094. It is for teams that already know the problem belongs in the defoamer lane and need to decide which of these three Longchang-supported routes deserves the first sample round.
Why this comparison deserves its own page
Longchang already has a broader page on how to choose defoamers for coatings and inks. That page helps buyers decide whether the defect belongs to defoaming, wetting, leveling, or another additive family. But once the lab is already down to 094, 303, and 3062, the buying question becomes narrower and more commercial: which route fits a water-based coating line, a waterborne printing-paste style line, or a broader multi-system coatings-and-inks program?
That narrower question is worth its own page because the company-supported product evidence already gives a real split:
- 094 is positioned as a waterborne coating defoamer with 50 to 500 ppm dosage guidance, water-only dilution, and an explicit pre-dilution-before-use process rule.
- 303 is positioned as a printing paste defoamer for water-based systems, also at 50 to 500 ppm, but with a simpler note that it can be added during the production process.
- 3062 is positioned as a printing ink defoamer with a broader UV, solvent, and water-based window and a higher working range of 0.1% to 0.5%.
That is enough product-level separation to support a real B2B shortlist instead of another broad overview page.
What buyers are usually trying to fix before this shortlist
In practical coatings and ink work, defoamer questions usually show up as one or more of these problems:
- foam during grinding, letdown, pumping, circulation, or application
- microbubbles that survive into the wet film or print surface
- air-release failure that leaves pinholes or a broken-looking finish
- a water-based system that needs a lower-risk defoamer route
- an ink or coating program spanning more than one system family where the team wants one broader benchmark first
That general framing also matches the broader search language around defoamer selection, where buyers often separate compatibility, system type, shear handling, and surface-defect risk instead of choosing only by the word defoamer. The product-specific claims below stay tied to Longchang-supported product pages.
Quick comparison table: which route deserves the first screen?
| Observed buyer priority | Best first route | Why it belongs first | Main watchpoint |
|---|---|---|---|
| Water-based coating line that can handle pre-dilution and wants very low-use concentrated defoaming | CHLUMIAF® 094 | Longchang supports 50 to 500 ppm use, water-based-only fit, 100% active ingredient, and a clear pre-dilution-first handling path | Direct addition is not recommended for the working solution, and dilution plus immediate use are part of the route |
| Waterborne systems or printing-paste style production where easier in-process addition matters | CHLUMIAF® 303 | Longchang frames it for water-based systems, says it can be added during production, and notes it can reduce foam generation in water-based coatings as a compatibility route | Avoid prolonged storage of diluted solution, use caution with alcohol solvents, and do not assume it behaves like a broader all-system route |
| One shortlist has to cover UV, solvent, and water-based inks or coatings | CHLUMIAF® 3062 | Longchang directly supports UV, solvent, and water-based systems with 0.1% to 0.5% use guidance and positions it as a printing-ink defoamer with broader crossover value | If solvent dilution is used, stability and defoaming performance should be checked first |
When CHLUMIAF® 094 is the better first move
094 should move to the front when the buyer is clearly inside a water-based coating line and can accept a more process-managed route in exchange for a very low dosage band and a 100% active product. Longchang supports 094 with a 50 to 500 ppm dosage recommendation based on total formulation, water-based-only system fit, and a composition built around polydimethylsiloxane plus a polyether-modified silicone paste.
The handling note matters commercially. Longchang says direct use in the working solution is not conducive to dispersion and recommends first diluting to below 60%, then using 10 to 40 times water to prepare a working solution that should be prepared and used immediately. That makes 094 a stronger first move when the lab can build that dilution discipline into the test plan instead of wanting a simpler drop-in style screen.
- Best first-screen use: concentrated water-based coating defoaming with disciplined pre-dilution
- Supported dosage: 50 to 500 ppm
- Main strength: very low use level with a dedicated waterborne-coating orientation
- Main caution: treat dilution and immediate-use handling as part of the product choice, not as an afterthought
When CHLUMIAF® 303 is the better first move
303 deserves earlier review when the buyer still wants a water-based route but needs easier production-stage handling. Longchang positions 303 as a printing paste defoamer, supports the same 50 to 500 ppm dosage range, and says it can be added during the production process. The page also states that it is suitable for almost all water-based systems and notes that when used as a compatibility agent in water-based coatings, it can reduce foam generation during coating.
That makes 303 the cleaner first route when the team is not only screening a water-based coating, but also wants a route that can sit more naturally inside broader waterborne processing or printing-paste style production. The watchpoints are different from 094. Longchang says to avoid prolonged storage of the diluted solution, avoid high-shear mixing during dilution, and use caution with alcohol solvents because the system can demulsify.
- Best first-screen use: waterborne systems that want easier in-process addition and broader production compatibility
- Supported dosage: 50 to 500 ppm
- Main strength: water-based breadth with a simpler production-stage addition note
- Main caution: do not overextend it into alcohol-heavy or freeze-risk handling without testing
When CHLUMIAF® 3062 is the better first move
3062 becomes more useful when the buyer wants a single broader benchmark across inks and coatings instead of a water-based-only route. Longchang supports it for UV systems, solvent systems, and water-based systems, with a recommended dosage of 0.1% to 0.5% depending on application. The same page positions it as a printing ink defoamer and also lists dosage windows across architectural coatings, industrial coatings, and wood and furniture coatings.
That makes 3062 the better first move when one program crosses multiple system families or when the team wants to compare one broader ink-and-coating crossover route against narrower water-based-only choices. The process note is again different: Longchang says that if solvent dilution is used, stability and defoaming performance tests should be done first.
- Best first-screen use: broader UV, solvent, and water-based crossover for inks and coatings
- Supported dosage: 0.1% to 0.5%
- Main strength: one route can screen across several system families instead of only waterborne work
- Main caution: solvent-side dilution still needs stability and performance confirmation
How buyers should choose before requesting samples
1. Decide whether the program is still purely water-based
If yes, 094 and 303 deserve earlier review. If the same screening plan must also touch UV or solvent work, 3062 usually becomes much harder to ignore.
2. Separate dilution discipline from convenience
094 is stronger when the lab can manage the pre-dilution route correctly. 303 becomes more attractive when the team values simpler production-stage addition inside waterborne work.
3. Keep process-side watchpoints visible
303 has emulsion-style watchpoints around alcohol solvents, freezing, and dilution handling. 3062 has broader system reach, but solvent-side dilution should still be checked. The better first screen is not just about final foam knockdown. It is also about which handling rule the plant can live with.
4. Use narrower pages together, not in isolation
If the buyer still needs the family-level map first, go back to How to Choose Defoamers for Coatings and Inks. If the line is already more print-focused, combine this shortlist with the live flexographic, gravure, screen ink, or waterborne overprint varnish pages.
5. Keep the first round tight
For many buyers, the cleanest first round is one 094-led concentrated waterborne route, one 303-led easier waterborne production route, and one 3062-led broader crossover route. That usually teaches more than jumping straight into a larger defoamer basket.
Recommended Longchang path from this page
- Cluster overview: CHLUMICRYL® Coating and Ink Additives
- Broader defoamer guide: How to Choose Defoamers for Coatings and Inks
- Waterborne application page: How to Choose Additives for Waterborne Industrial Coatings
- Waterborne OPV page: How to Choose Additives for Waterborne Overprint Varnishes
- Flexographic ink page: How to Choose Additives for Flexographic Inks
- Gravure ink page: How to Choose Additives for Gravure Inks
- Screen ink page: How to Choose Additives for Screen Inks
- 094 product page: CHLUMIAF® 094
- 303 product page: CHLUMIAF® 303
- 3062 product page: CHLUMIAF® 3062
FAQ
Which product should I screen first for a water-based coating if I can manage pre-dilution?
Usually CHLUMIAF® 094, because Longchang supports it as a waterborne-coating defoamer with 50 to 500 ppm dosage guidance and a specific pre-dilution workflow.
When should 303 move ahead of 094?
303 should move ahead when the project is still water-based but the team wants a route that can be added during production and fits broader waterborne or printing-paste style processing.
When is 3062 a better first route than either 094 or 303?
3062 becomes the better first route when the screening plan needs one broader benchmark across UV, solvent, and water-based inks or coatings instead of a water-based-only route.
Are these three products interchangeable?
No. 094 is a more concentrated water-based route with pre-dilution discipline, 303 is a waterborne production-stage route with emulsion-style handling watchpoints, and 3062 is the broader multi-system route.
Need a faster defoamer shortlist?
If your project is stuck between concentrated waterborne foam control, easier water-based production handling, and broader ink-or-coating crossover screening, stop treating all three routes as the same first move. Start by deciding whether the real constraint is water-based-only process discipline, waterborne production convenience, or multi-system coverage. That usually shows much faster whether CHLUMIAF® 094, 303, or 3062 deserves the first sample round.