{"id":10768,"date":"2026-07-21T00:00:41","date_gmt":"2026-07-21T00:00:41","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=10768"},"modified":"2026-08-09T12:53:13","modified_gmt":"2026-08-09T12:53:13","slug":"3280-vs-3432-vs-3501","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/it\/3280-vs-3432-vs-3501\/","title":{"rendered":"3280 vs 3432 vs 3501: Wetting, Leveling & Release"},"content":{"rendered":"

3280 vs 3432 vs 3501<\/strong> should be decided by the failed stage of the printed film. CHLUMIWE\u00ae 3280 is a documented difficult-substrate wetting route. CHLUMILE\u00ae 3432 is a leveling\/smoothness route with a published dose. CHLUMIAG\u00ae 3501 is an anti-sticking\/release candidate whose public page does not publish a dose or quantified result.<\/p>\n

\n
\n
Entry<\/strong>
3280 for verified substrate-wetting failure.<\/div>\n
Flow<\/strong>
3432 for print-face leveling and smoothness.<\/div>\n
Handling<\/strong>
3501 only after dose and block protocol.<\/div><\/div>
Original 3280\/3432\/3501 map: diagnose substrate entry, film flow or dry handling.<\/figcaption><\/figure>\n

Correct the 3280 product link<\/h2>\n

The supported current product path is CHLUMIWE\u00ae 3280<\/a>. A longer legacy URL used in some content does not resolve through the current WordPress product record. Use the current page, product code, TDS revision and COA in sample and purchasing documents.<\/p>\n

Compare only supported facts<\/h2>\n\n\n\n\n\n\n\n
Prodotto<\/th>\nPublished facts<\/th>\nPrimary screen<\/th>\nEvidence boundary<\/th>\n<\/tr>\n<\/thead>\n
CHLUMIWE\u00ae 3280<\/td>\n100% active polyether-modified polysiloxane; 0.2\u20133.0% total formula; water\/solvent\/UV; low surface tension and substrate wetting<\/td>\nRetraction, poor spread or wetting-linked pinholes<\/td>\nNo quantified adhesion, rub or production result<\/td>\n<\/tr>\n
CHLUMILE\u00ae 3432<\/a><\/td>\n100% active polyether-modified polysiloxane; 0.05\u20131.0% total formula; water\/solvent\/UV; leveling, smoothness and anti-cratering<\/td>\nUneven flow, orange peel or print-face smoothness<\/td>\nScratch\/abrasion claims are qualitative; approve by defined test<\/td>\n<\/tr>\n
CHLUMIAG\u00ae 3501<\/a><\/td>\n100% active acrylic-modified silicone oil; printing ink, overprint varnish and release\/anti-sticking applications<\/td>\nSupplier-supported block\/release study<\/td>\nNo public dosage or quantified block, rub or COF result<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Use 3280 when the substrate is the first barrier<\/h2>\n

3280 is supported for difficult substrates and the page states that it does not intentionally improve slip or affect recoatability. That makes it a cleaner diagnostic for substrate entry than an anti-sticking product. Verify substrate identity, surface treatment and contamination, then run low\/mid\/high dose within 0.2\u20133.0%.<\/p>\n

Record wetting, pinholes, density, adhesion, foam and downstream overprint\/lamination. The broad dose range is not a target; use the lowest reproducible level that solves the measured defect without creating craters or intercoat problems.<\/p>\n

Use 3432 when the wet film needs leveling<\/h2>\n

3432 is supported for smoothness, leveling, substrate wetting, anti-cratering and use in printing inks, overprint varnishes and multiple coating systems. Its published range is 0.05\u20131.0% of total formulation and active ingredient is 100%. It may be added at different production stages, but the trial should fix one addition point and shear history.<\/p>\n

Choose it after confirming that the substrate is already wetted and the remaining problem is flow or surface uniformity. Test gloss, density, surface texture, rub, block, adhesion and any following print or varnish layer. Do not convert qualitative scratch\/abrasion language into a guaranteed value.<\/p>\n

Gate 3501 by method and dose<\/h2>\n

3501\u2019s public application list supports release and anti-sticking, but there is no public recommended dosage. There is also no public pressure\/temperature\/time blocking protocol. Request both before screening. An equal as-supplied comparison with 3280 or 3432 would have no evidence basis.<\/p>\n

First verify drying or cure, retained solvent\/water, rewind temperature, roll pressure and storage. If those controls are wrong, a release additive may conceal rather than solve the production failure.<\/p>\n

Prepare repeatable prints<\/h2>\n

ASTM D6687<\/a> provides a current guide to printing-ink vehicle\/component tests. Match laboratory proofing to the actual print process and hold substrate lot, treatment, viscosity, deposit, cure and conditioning constant. Use a full control formulation rather than comparing the additives in a simplified carrier alone.<\/p>\n

Use a staged matrix<\/h2>\n\n\n\n\n\n\n\n\n
Stage<\/th>\nCandidate<\/th>\nPrimary readout<\/th>\nMandatory guardrail<\/th>\n<\/tr>\n<\/thead>\n
0<\/td>\nUnchanged control<\/td>\nWetting, density, flow and block baseline<\/td>\nRepeatability across at least three prints<\/td>\n<\/tr>\n
1<\/td>\n3280 ladder<\/td>\nSubstrate entry and wetting-linked voids<\/td>\nAdhesion, foam and overprint<\/td>\n<\/tr>\n
2<\/td>\n3432 ladder<\/td>\nLeveling and surface smoothness<\/td>\nRub, block and intercoat adhesion<\/td>\n<\/tr>\n
3<\/td>\n3501 data-approved ladder<\/td>\nBlock\/release under defined conditions<\/td>\nCOF, rub, adhesion and conversion<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Normalize optical density<\/h2>\n

ASTM D7305<\/a> supports reflection-density measurement on printed paper, film and board. Compare additives at the same density target so a change in transferred ink is not misread as better leveling or gloss. The method is not intended for metal or foil.<\/p>\n

Separate rub from blocking<\/h2>\n

ASTM D5264<\/a> provides a comparative rub practice. Fix conditioning, receptor, load and cycles. Blocking is a separate face-to-face or face-to-back pressure\/temperature\/time test. Approve both because increased slip or release can alter rub, print receptivity and converting behavior.<\/p>\n

Do not infer packaging compliance<\/h2>\n

None of the three public pages establishes food-contact, pharmaceutical-contact, low-migration or restricted-substance compliance for a finished package. Obtain the documents required for the destination market and validate set-off or migration on the complete construction.<\/p>\n

Selection rules<\/h2>\n