Quick answer: buyers choosing additives for waterborne screen inks usually get a cleaner first shortlist when they separate three different jobs instead of asking one additive to rescue every print defect at once. Start with CHLUMIWE® 2100 when the waterborne screen ink still needs stronger substrate wetting, spread, and lower-surface-tension entry on a difficult surface. Move CHLUMIAG® 3501 forward when the ink already prints directionally but the printed face still needs anti-sticking, release, or downstream handling control. Start with CHLUMICRYL® WE-D912R when the real blocker is microbubbles, foam retention, or compatibility-sensitive bubble cleanup in a water-based screen-ink route.
This page stays inside the redirected CHLUMICRYL® Coating and Ink Additives direction and does not fall back to the older photoinitiator cluster. It also is not a duplicate of Longchang’s already-live screen ink additives page or the nearby waterborne overprint varnish additives page. It answers a narrower B2B question: which additive deserves the first trial when the ink is specifically waterborne, printed by screen process, and still not giving a clean result on the target surface?
Why waterborne screen inks deserve their own additive page
A waterborne screen ink sits in a tighter buyer lane than a broad screen-ink article because the system has to keep together water-based process behavior, screen-print laydown, and printed-face handling after drying. It also sits in a different lane from waterborne overprint varnish work because the buyer is not only managing a thin finish layer over an existing print. The ink itself still has to spread, transfer, dry, and handle correctly as the printed film.
That creates a different first-screen question from the broader screen-ink page. In practical lab work, the first additive decision often needs to separate a difficult-surface wetting problem from a print-face anti-sticking and handling problem, and both from a true water-based bubble-cleanup problem. Those are not the same first screen, even when the same printed panel or sheet seems to show all three symptoms at once.
General industry framing supports that split conservatively. Waterborne screen-print systems are often judged first by how cleanly the ink wets the substrate, whether the dried print face still sticks or drags, and whether entrained air keeps disturbing film appearance or process stability. The product-specific facts below still stay tied to current Longchang-supported product pages.
What the current company-supported evidence actually separates
- CHLUMIWE® 2100 is supported by Longchang as a multi-component modified polydimethylsiloxane route with very low surface tension, suitability for difficult-to-wet substrates, and applicability across UV, solvent, and water-based systems. The current company-supported route also says that, with a small amount added, it will not produce stable foam under high-speed dispersion, which is commercially useful in a waterborne printing window where foam sensitivity already matters.
- CHLUMIAG® 3501 is the broader print-face anti-sticking and handling route. Longchang directly lists it for printing inks, inkjet inks, screen printing inks, overprint varnishes, release coatings, and anti-sticking-agent use. The current company page also supports use across UV, solvent, and water-based systems, and says it can be added at any stage or later.
- CHLUMICRYL® WE-D912R is supported as a water-borne emulsion defoamer for water-based paints, water-based inks, overprint varnishes, and acrylic overprint varnishes. Longchang directly highlights microbubble suppression, excellent compatibility, and suitability for medium- and high-viscosity systems, with a supported dosage range of 0.1% to 1.0%.
That is enough company-supported separation to build a real buyer page without inventing unsupported screen-print-specific product facts. The goal is not to pretend one additive can solve every waterborne screen-ink complaint. The goal is to help the buyer choose the first better trial route.
Quick comparison table: which route deserves the first screen?
| Buyer priority in waterborne screen inks | Best first route | Why it belongs first | Main watchpoint |
|---|---|---|---|
| The waterborne screen ink still hesitates, pulls back, or spreads weakly on the target substrate | CHLUMIWE® 2100 | The supported route is built around very low surface tension, difficult-substrate wetting, and broad water-based applicability | Use it when the first problem is still substrate entry, not when the real complaint starts after drying on the printed face |
| The ink already prints directionally, but the dried print face still sticks, drags, blocks, or handles poorly | CHLUMIAG® 3501 | Longchang directly supports it for screen printing inks, anti-sticking use, and broader downstream handling logic across water-based systems | Do not treat it as a substitute for real wetting correction when the ink still cannot enter the surface cleanly |
| Entrained air, foam retention, or microbubbles are still corrupting transfer or final film appearance | CHLUMICRYL® WE-D912R | Longchang directly positions it for water-based inks and highlights compatibility-led microbubble suppression in waterborne systems | It is a water-based bubble-control route, not the first answer to surface slip or difficult-substrate wetting |
When CHLUMIWE® 2100 is the better first move
2100 should move first when the waterborne screen-ink project still looks like a substrate-entry problem. This is the cleaner starting route when the ink is not spreading or covering the target surface cleanly enough to judge the rest of the package honestly.
That distinction matters because screen-printing teams often see more than one complaint at once. A weakly wetting waterborne ink can also look rough, unstable, or bubble-prone simply because the film never settled correctly on the surface in the first place. If the substrate-entry route is still wrong, it becomes harder to interpret later print-face or defoaming trials.
- Best first-screen use: difficult-substrate wetting and spread in waterborne screen inks
- System fit: the current company route supports UV, solvent, and water-based systems
- Main strength: a practical first route when the buyer still needs lower surface tension and cleaner entry on the target surface
- Main caution: use it when the dominant problem is wetting and spread, not when the ink already lands directionally and the real complaint is sticking or bubble cleanup
In short, 2100 is the better first move when the question is still how the waterborne screen ink meets the substrate.
When CHLUMIAG® 3501 is the better first move
3501 should move ahead first when the ink already prints directionally but still shows a dried-face handling problem. This route is stronger when the issue is not basic surface entry, but blocking, sticking, drag, release-oriented handling, or downstream contact pressure on the printed face.
That matters in waterborne screen inks because many printed surfaces are stacked, contacted, overprinted, converted, or handled soon after drying. Those downstream steps can expose a different additive problem from the original laydown stage. Longchang’s current public page is useful here because 3501 is not positioned only as a narrow coating additive. The supported route keeps together screen printing inks, printing inks, overprint varnishes, release coatings, and anti-sticking use, while staying open across UV, solvent, and water-based systems.
- Best first-screen use: anti-sticking, release, and downstream handling control after the waterborne screen ink already prints directionally
- System fit: UV, solvent, and water-based systems on the current public page
- Main strength: one route that already supports screen-printing use plus broader anti-sticking and handling logic
- Main caution: if the printed film still has obvious wetting failure, 3501 should not be used to hide a problem that still belongs to the 2100 route first
So 3501 is the better first move when the waterborne screen-ink project needs a handling-first cleanup route after the print already lands acceptably.
When CHLUMICRYL® WE-D912R is the better first move
WE-D912R should move ahead first when the waterborne screen ink is being limited by microbubbles, foam retention, or air-release instability. In those cases, a better wetting route or a better anti-sticking route usually will not give the team an honest film read until the bubble problem is under control.
Longchang’s product page is direct here. WE-D912R is supported specifically as a water-borne emulsion defoamer for water-based inks and nearby waterborne finishing routes, and the product is positioned around microbubble suppression with excellent compatibility. That matters commercially because waterborne screen-print teams often need a bubble-control route that does not create a second compatibility problem while fixing the first one.
- Best first-screen use: persistent microbubbles, foam retention, or water-based bubble-cleanup problems in screen inks
- Dosage guidance: 0.1% to 1.0% of total formulation
- Main strength: a compatibility-led bubble-control route already tied by Longchang to water-based inks
- Main caution: it is not a substitute for a true wetting route or a printed-face anti-sticking route when those are the real first bottlenecks
This is the stronger first move when the visible print defect is being limited by air management, not by a missing wetting route or a missing handling route.
How buyers should choose before requesting samples
1. Start with the real first failure on the printed film
If the waterborne screen ink still hesitates or pulls back on the substrate, start with 2100. If the ink already prints directionally but still sticks or drags after drying, move 3501 forward. If foam or microbubbles are still corrupting the print read, start with WE-D912R.
2. Keep surface entry separate from dried-face handling
A waterborne screen ink that cannot wet the substrate cleanly and a waterborne screen ink that prints acceptably but still handles poorly are not the same additive problem. Separating those routes early usually makes the first trial set much more honest.
3. Keep bubble cleanup separate from both surface routes
Microbubble control is not just a smaller version of wetting correction or slip control. If entrained air is still sitting in the film, it can distort how the team reads every later additive.
4. Respect the watchpoint, not only the headline benefit
2100 brings a substrate-entry route. 3501 brings a broader anti-sticking and handling route. WE-D912R brings direct water-based bubble cleanup. Those practical differences usually decide the better first route more than the additive family name alone.
5. Keep the first trial set small
For many waterborne screen-ink buyers, one 2100 wetting route, one 3501 handling route, and one WE-D912R bubble-control route teach more than an overloaded first screen filled with partially overlapping additives.
Recommended Longchang path from this page
- Wetting route: CHLUMIWE® 2100
- Handling route: CHLUMIAG® 3501
- Bubble-control route: CHLUMICRYL® WE-D912R
- Cluster overview: CHLUMICRYL® Coating and Ink Additives
- Related broad page: How to Choose Additives for Screen Inks
- Related waterborne print-finishing page: How to Choose Additives for Waterborne Overprint Varnishes
- Related function page: How to Choose Wetting Additives for Coatings and Inks
- Related function page: How to Choose Defoamers for Coatings and Inks
- Related function page: How to Choose Anti-Blocking Additives for Coatings and Inks
FAQ
Which additive should I screen first if a waterborne screen ink still is not spreading cleanly?
Usually 2100, because the supported route is built around very low surface tension and difficult-substrate wetting, which matches a real entry-and-spread problem more directly than a handling or bubble-only route.
When should 3501 move ahead of 2100?
3501 should move ahead when the ink already prints directionally but the dried print face still sticks, drags, blocks, or handles poorly during downstream contact.
When does WE-D912R make more sense than the other two?
It makes more sense when microbubbles, foam retention, or compatibility-sensitive air-release problems still dominate the visible defect pattern and the team needs a water-based ink defoamer route rather than another surface-control trial.
Is this page the same as the broader screen-ink additives page?
No. The broader screen-ink page still answers the wider application question across UV, solvent, and water-based systems. This page is narrower and helps waterborne screen-ink buyers decide whether the first problem is substrate entry, dried-face handling, or water-based bubble cleanup.
Does this page make food-contact or regulatory claims for packaging work?
No. This page stays focused on additive-selection logic for waterborne screen-print workflows. Any compliance, migration, or final end-use qualification still needs separate formulation and regulatory review.
Next step
If your waterborne screen-ink project is stuck between weak surface entry, dried-face handling pressure, and microbubble carry-through, stop treating them as the same additive request. Start with the real bottleneck first. That usually makes the next CHLUMICRYL® sample decision faster and more commercially useful.