Risposta rapida: acquirenti che lavorano su waterborne direct-to-metal clearcoats usually get a cleaner first shortlist when they stop asking one additive to rescue every final-film defect at once and instead separate tre lavori diversi. CHLUMIAG® 3467 should move first when the main target is compatibility-first anti-cratering, substrate wetting, and cleaner clear-film laydown on exposed metal. CHLUMICRYL® DF-D9904BR deserves the earlier screen when the real bottleneck is microbubbles, foam carry-through, or pinholes in the water-based clear film. CHLUMIFE® 3166 is the cleaner first move when the clearcoat already can form a usable film, but still needs a stronger smoothness, dry-feel, gloss, and scratch-balance route.
That is the commercially useful split. This page stays inside the redirected CHLUMICRYL® Additivi per vernici e inchiostri direction and does non return to the older photoinitiator cluster. It also is not a duplicate of Longchang’s already-live waterborne direct-to-metal topcoat, waterborne direct-to-metal coatings, O waterborne topcoat pages. It is a narrower waterborne direct-to-metal clearcoat buyer page for teams qualifying transparent or semi-transparent protective metal finishes where crater sensitivity, trapped air, and final-surface refinement need to be separated early.
Why waterborne direct-to-metal clearcoats deserve their own additive page
A waterborne direct-to-metal clearcoat sits in a tighter buyer lane than a broad direct-to-metal article or even a general topcoat page because the finish is often judged as an exposed clear final film. That means the formulator is not only asking whether the coating reaches metal, but whether the film stays visually calm enough to show the metal finish cleanly, whether trapped air still leaves pinholes, and whether the final surface looks and feels commercially acceptable after drying.
That creates a different first-screen question from a broader direct-to-metal page. In practical formulation work, the first additive decision often needs to separate a compatibility-and-crater-control problem from a true microbubble and pinhole problem, and both from a later final-surface smoothness and scratch-balance problem. Those are not the same first screen, even when they all show up on the same panel.
General industry framing supports that narrower structure conservatively. Waterborne clear metal finishes are commonly judged first by surface-entry and crater behavior, air-release disciplinee final appearance durability balance. The product facts below stay tied to Longchang-supported product pages, while the broader framing is used only to explain why buyers should not treat every clear-film defect as the same additive job.
What the current company-supported evidence actually separates
- CHLUMIAG® 3467 is supported by Longchang as a polisilossano modificato multicomponente that can be used across UV, solventee sistemi a base d'acqua. Longchang positions it around livellamento, anti-cratere, bagnatura del substrato, and a clear note that the product dà priorità alla compatibilità del sistema. The supported dosage guidance is Da 0,05% a 1,0% of total formulation for solvent systems, Da 0,5% a 5% of resin amount for resin modification, and Da 0,5% a 5% of total formulation for water-based systems.
- CHLUMICRYL® DF-D9904BR è supportato come polyether modified polysiloxane compound, silica-free, for sistemi a base d'acqua. Longchang directly positions it to prevent microbubbles and pinholes in the coating film of water-based coatings and inks. The supported dosage range is Da 0,1% a 1,0%, and the product page recommends co-solvent-first, high-shear incorporation instead of treating it as a late after-add shortcut.
- CHLUMIFE® 3166 è supportato come poliorganosilossano modificato con polieteri per UV, solventee sistemi a base d'acqua. Longchang supports reduced surface tension, bagnabilità del substrato, levigatezza della superficie, resistenza ai graffi, antibloccaggio, livellamento, miglioramento della brillantezza, and especially eccellente sensazione di asciutto. The recommended dosage is Da 0,05% a 1,0%, with cautions around fori di spillo, sbiancamento, and possible foam-stabilizing effects.
That is enough company-supported separation to build a real buyer page without inventing unsupported direct-to-metal clearcoat claims. The point is not to pretend one additive can solve every final-film complaint. The point is to help a buyer choose the first better test route based on what the clearcoat is actually failing to do.
Tabella comparativa rapida: quale percorso merita di essere visualizzato per primo?
| Buyer priority in waterborne DTM clearcoats | Il miglior primo percorso | Perché appartiene al primo posto | Punto di osservazione principale |
|---|---|---|---|
| Clear metal film still shows craters, pullback, or compatibility-sensitive laydown instability | CHLUMIAG® 3467 | Longchang supports it around anti-cratering, substrate wetting, and compatibility-first leveling across water-based systems | Its supported logic prioritizes compatibility more than final feel, so it is best screened when crater stability comes before tactile refinement |
| Persistent microbubbles, foam carry-through, or pinholes are blocking an honest read of the clear film | CHLUMICRYL® DF-D9904BR | Longchang directly positions it to prevent microbubbles and pinholes in water-based coating films | It is not a casual late after-add, and the recommended co-solvent plus high-shear route should be respected |
| The clearcoat already can form a film, but still needs smoother appearance, better dry feel, more gloss balance, and stronger scratch-balance support | CHLUMIFE® 3166 | Longchang supports it as a broader final-surface route across smoothness, gloss, anti-blocking, scratch resistance, and dry feel | Qualification should still watch for pinholes, whitening, or foam stabilization in sensitive clear systems |
Quando CHLUMIAG® 3467 è la scelta migliore come prima opzione
3467 should move first when the waterborne direct-to-metal clearcoat still is not settling onto the panel in a stable way. This is the better route when the team is dealing with compatibility-sensitive anti-cratering, pullback, or a clear-finish surface that needs a more reliable combination of bagnatura del substrato e livellamento before the higher-level appearance judgment is even fair.
That supported logic is commercially useful because Longchang does not position 3467 only as a vague silicone additive. The current product page keeps together livellamento, anti-cratere, bagnatura del substratoe compatibilità del sistema, while staying open across water-based systems and even offering a resin-modification route when needed.
- Utilizzo ottimale come primo schermo: crater-sensitive and compatibility-led direct-to-metal clearcoat screening
- Water-based dosage guidance: 0.5% to 5% of total formulation on the current company page
- Punto di forza principale: one route that already combines anti-cratering, wetting, and compatibility-first logic
- Avvertenza principale: feel is not its strongest supported story, so use it when the clearcoat still needs stability first
In short, 3467 is the better first move when the clear metal finish still needs cleaner crater control and laydown discipline before the team starts chasing final tactile refinement.
Quando CHLUMICRYL® DF-D9904BR è la scelta migliore come prima opzione
DF-D9904BR should move ahead first when the waterborne direct-to-metal clearcoat is losing the fight to microbubbles, foam carry-through, or pinholes. In those cases, better compatibility or a better final-surface route usually will not clean up the panel enough to judge the rest of the package honestly.
Longchang’s product page is direct here. DF-D9904BR is supported specifically to prevent microbolle e fori puntiformi in the coating film of water-based coatings and inks, and it comes with a process note that matters commercially: the product should enter through a co-solvent step and be added under alto taglio rather than being treated as a late shortcut.
- Utilizzo ottimale come primo schermo: persistent microbubbles and pinholes in waterborne direct-to-metal clearcoats
- Indicazioni sul dosaggio: Da 0,1% a 1,0% della formulazione totale
- Regola di preparazione: use the supported co-solvent-first, high-shear route
- Main reason to shortlist it: it solves a different first problem from crater-control or broader surface-refinement routes
This is the stronger first move when the visible clearcoat defect is being limited by air management, not by a missing compatibility or finish-balance route.
Quando CHLUMIFE® 3166 è la scelta migliore come prima opzione
3166 deserves the earlier screen when the waterborne direct-to-metal clearcoat can already form a workable film and the buyer’s real question has shifted into final-surface refinement. This is the cleaner first path when the clear film already wets and levels directionally well enough, but still needs a stronger smoothness, dry-feel, lucidoe scratch-balance route before the panel looks commercially ready.
Longchang’s current product page keeps 3166 useful here because it is not positioned only as a niche feel additive. It is supported around controllo della tensione superficiale, bagnabilità del substrato, levigatezza della superficie, resistenza ai graffi, antibloccaggio, livellamento, miglioramento della brillantezza, and especially eccellente sensazione di asciutto. That combination is commercially useful for clear metal finishes where the buyer is already past basic defect rescue and wants a calmer, more refined exposed surface.
- Utilizzo ottimale come primo schermo: final-surface smoothness, dry feel, gloss, and scratch-balance refinement
- Indicazioni sul dosaggio: Da 0,05% a 1,0% della formulazione totale
- Punto di forza principale: one broader route instead of another narrow defect-only screen
- Avvertenza principale: Longchang also flags possible pinholes, whitening, and foam stabilization, so the line should be stable enough to read those tradeoffs honestly
So 3166 is the cleaner first move when the job is to improve the overall finish quality of a waterborne direct-to-metal clearcoat, not only to rescue crater or bubble defects.
Come gli acquirenti dovrebbero scegliere prima di richiedere i campioni
1. Start with the first visible failure on the clear panel
If the film still is cratering or pulling back because of compatibility-sensitive surface behavior, start with 3467. If bubbles and pinholes still dominate the panel, move DF-D9904BR forward. If the film already forms but the final surface still needs a better feel-and-scratch balance, start with 3166.
2. Keep crater logic separate from bubble logic
Many clearcoat projects collapse anti-cratering and defoaming into the same request. That usually makes the first sample round noisy. A clearcoat that pulls back on the panel and a clearcoat that traps application air are not necessarily asking for the same additive first.
3. Keep finish-refinement work separate from defect rescue
Smoothness, gloss, dry feel, and scratch-balance are not just smaller versions of crater correction or bubble cleanup. If the panel still has basic crater or air-release problems, it can distort how the team reads every other surface additive.
4. Respect the process note, not only the headline benefit
3467 is attractive because it can stabilize difficult clearcoat packages. DF-D9904BR is attractive because it directly solves microbubble and pinhole pressure. 3166 is attractive because it broadens final-surface refinement. But their practical notes are just as important as their headline roles. The supported dosing window, addition route, and watchpoints often decide which route wins the first sample round.
5. Keep the first trial set small and honest
For many waterborne direct-to-metal clearcoat projects, the cleanest first plan is one 3467 compatibility-first crater-control route, uno DF-D9904BR microbubble-control routee uno 3166 final-surface refinement route. That usually teaches more than forcing several near-neighbor additives into the same opening trial.
Percorso consigliato per Longchange da questa pagina
- Compatibility-first crater-control route: CHLUMIAG® 3467
- Bubble-control route: CHLUMICRYL® DF-D9904BR
- Final-surface refinement route: CHLUMIFE® 3166
- Panoramica del cluster: CHLUMICRYL® Additivi per vernici e inchiostri
- Related substrate page: How to Choose Additives for Waterborne Direct-to-Metal Coatings
- Related stage page: How to Choose Additives for Waterborne Direct-to-Metal Primers
- Related stage page: How to Choose Additives for Waterborne Direct-to-Metal Topcoats
- Related broad page: How to Choose Additives for Waterborne Topcoats
- Pagina relativa al difetto: How to Choose Additives for Coating Fisheyes
- Pagina relativa al difetto: How to Choose Additives for Coating Pinholes
FAQ
Which additive should I screen first if a waterborne direct-to-metal clearcoat still is cratering?
Usually CHLUMIAG® 3467, because Longchang already supports it for compatibility-first anti-cratering, wetting, and leveling across water-based systems.
When should DF-D9904BR move ahead of 3467?
DF-D9904BR should move ahead when microbubbles, foam carry-through, or pinholes still dominate the visible defect pattern and the process can follow the recommended co-solvent-first, high-shear addition route.
When does 3166 make more sense than the other two?
It makes more sense when the clear film already can form and the main question has shifted into surface smoothness, dry feel, gloss, and broader scratch-balance cleanup rather than basic crater or bubble rescue.
Is this page replacing the waterborne direct-to-metal topcoat page?
No. The topcoat page still answers a different buyer question first. This new page is narrower and helps direct-to-metal clearcoat buyers choose between crater-control, bubble-control, and final-surface-refinement routes for waterborne clear finishes on metal.
Does this page make corrosion or end-use compliance claims?
No. This page stays focused on additive-selection logic for waterborne direct-to-metal clearcoat workflows. Any corrosion package, regulatory requirement, or final end-use qualification still needs separate formulation and application review.
Hai bisogno di una lista di candidati più ristretta?
If your waterborne direct-to-metal clearcoat project is stuck between crater-sensitive compatibility, microbubble carry-throughe final metal-surface refinement, stop treating them as the same additive request. Start with the real bottleneck. That usually makes the next CHLUMICRYL® sample decision faster and more commercially useful.