{"id":10867,"date":"2026-07-25T00:00:24","date_gmt":"2026-07-25T00:00:24","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=10867"},"modified":"2026-08-09T06:17:45","modified_gmt":"2026-08-09T06:17:45","slug":"paper-varnish-additives","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/ko\/paper-varnish-additives\/","title":{"rendered":"Paper Varnish Additives: Wetting, Leveling & Rub"},"content":{"rendered":"

Paper varnish additives should be selected by wetting, leveling or verified process air.<\/strong> CHLUMIAG\u00ae 2100 is the substrate-entry route, CHLUMILE\u00ae 3432 is the film-leveling route, and CHLUMIAF\u00ae 3062 is the defoamer route. Rub, blocking, cure and converting remain separate approval gates.<\/p>\n

CHLUMIAG\u00ae 3501 leaves the first shortlist because its public page lists overprint varnish and anti-sticking applications but gives no recommended dosage or quantified anti-sticking\/handling endpoint. A current TDS is needed before a paper-varnish trial.<\/p>\n

Paper-varnish decision map<\/h2>\n
\n\n\n\n\n\n\n\n\n
Observed condition<\/th>\nFirst check<\/th>\nRoute to screen<\/th>\n<\/tr>\n<\/thead>\n
Beading, edge pullback or incomplete cover on paper\/ink<\/td>\nPaper coat, ink cure, contamination, surface energy and viscosity<\/td>\n2100<\/td>\n<\/tr>\n
Substrate wets but orange peel or gloss variation remains<\/td>\nFilm weight, rheology, drying\/cure and application<\/td>\n3432<\/td>\n<\/tr>\n
Wet bubbles become craters or pinholes<\/td>\nTrack air through mix, pump, anilox\/roller and application<\/td>\n3062<\/td>\n<\/tr>\n
Sheets stick after drying<\/td>\nCure, residual water\/solvent, stack heat, pressure and time<\/td>\nFix process before anti-stick claim<\/td>\n<\/tr>\n<\/tbody>\n<\/table>
Original paper-varnish map: separate substrate entry, film leveling, process air and post-dry handling.<\/figcaption><\/figure>\n\n\n\n\n\n\n\n
\uc81c\ud488<\/th>\nPublished fit<\/th>\nSupplier guidance<\/th>\nBoundary<\/th>\n<\/tr>\n<\/thead>\n
CHLUMIAG\u00ae 2100<\/strong><\/a><\/td>\nWetting\/spreading for difficult substrates and high-smoothness packaging; UV, solvent and water-based<\/td>\n0.1\u20131%; grind, stir or post-add; broad dilution options<\/td>\nPage notes reactivity and tool-contamination risk; adhesion must be measured<\/td>\n<\/tr>\n
\ud074\ub8e8\ub9c8\uc77c\u00ae 3432<\/strong><\/a><\/td>\nOverprint-varnish leveling, wetting and anti-crater route; UV, solvent and water-based<\/td>\n0.05\u20131%; any stage; broad dilution options<\/td>\nNot a cure or true defoaming route; avoid additive mixtures<\/td>\n<\/tr>\n
CHLUMIAF\u00ae 3062<\/strong><\/a><\/td>\n100% active silicone defoamer for printing\/color systems; UV, solvent and water-based<\/td>\nPrinting-ink guidance 0.1\u20130.5% total<\/td>\nPaper varnish dosage needs supplier confirmation; solvent dilution must be tested<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Characterize paper and printed surface first<\/h2>\n

Record paper or paperboard grade, coat and calender, porosity\/absorbency, moisture, recycled content, surface treatment, printing ink, ink coverage, drying\/cure age, powder, fountain residues and contamination. An additive cannot make two materially different sheets behave identically.<\/p>\n

Use production sheets with the actual ink underneath. Unprinted white paper can hide wetting and intercoat failures that appear over heavy ink coverage.<\/p>\n

Use 2100 for a confirmed wetting problem<\/h2>\n

2100 supports spreading and wetting on difficult and high-smoothness packaging substrates across UV, solvent and water-based systems. Start low within 0.1\u20131% after contamination, viscosity and paper variability are controlled.<\/p>\n

The page also mentions reactivity and avoiding tool contamination. Obtain current handling guidance and measure wetting, edge hold, gloss, adhesion, rub, block, slip and overprint\/foil\/glue acceptance. Improved initial contact does not prove long-term adhesion.<\/p>\n

Use 3432 for film leveling<\/h2>\n

3432 is supported for overprint varnishes and can improve smoothness, wetting and crater control at 0.05\u20131%. It is the clearer route when the sheet already wets but the varnish face remains uneven.<\/p>\n

Run it alone before combinations. Check flow, gloss\/haze, foam, rub, COF, block, adhesion and downstream converting because excessive surface modification can shift several of these at once.<\/p>\n

Use 3062 only for measured air<\/h2>\n

3062 has direct defoaming and foam-suppression positioning. Diagnose where air enters: mixing, recirculation, pump cavitation, roller\/anilox transfer or coating head. Compare wet-film bubbles with cured voids.<\/p>\n

The public page gives 0.1\u20130.5% for printing inks, not a paper-varnish-specific range. Confirm the current TDS and application dosage. If solvent dilution is used, test both dilution stability and retained defoaming performance.<\/p>\n

Why 3501 needs more evidence<\/h2>\n

The 3501 page identifies acrylic-modified silicone oil and lists printing inks, overprint varnishes, release coatings and anti-sticking use. However, it publishes no recommended dosage and no quantified blocking, stack or converting result. That is not enough for a primary recommendation.<\/p>\n

Measure rub, cure and blocking separately<\/h2>\n

ASTM D5264<\/a> compares abrasion resistance of printed materials, including printed inks, coatings and packaging substrates, using a Sutherland Rub Tester. ASTM D5181<\/a> offers a GA-CAT abrasion comparison for printed matter, varnishes and flat packaging substrates. Neither laboratory method reproduces every shipment or stack condition.<\/p>\n

For UV varnish, ASTM D5402<\/a> can support a solvent-resistance check, but it does not prove full cure. Report actual cure method, coat weight, conditioning, rub receptor\/load\/cycles, gloss\/color loss, block pressure\/temperature\/time, COF and converting result.<\/p>\n

For blocking, define face-to-face or face-to-back contact, specimen area, stack pressure, temperature, humidity, dwell and separation rating. Warm sheets that pass a room-temperature hand test may still offset, gloss-mark or stick in a production pile. Repeat after the intended conditioning time and after any downstream heat step.<\/p>\n

Run a production-representative trial<\/h2>\n
    \n
  1. Fix paper, ink, varnish batch, viscosity, coat weight and line settings.<\/li>\n
  2. Use blank plus one-additive dosage ladder.<\/li>\n
  3. Condition sheets at controlled temperature and humidity.<\/li>\n
  4. Test face-to-face and face-to-back stacks at realistic heat and pressure.<\/li>\n
  5. Include cutting, creasing, folding, gluing, foil or lamination required downstream.<\/li>\n<\/ol>\n

    Keep regulatory claims separate<\/h2>\n

    A general product page does not establish food-contact, low-migration, toy, pharmaceutical or recycling compliance. Define the market, packaging layer, barrier, cure, migration scenario and customer specification, then request current declarations for the exact product and use level.<\/p>\n

    Request a paper-varnish shortlist<\/h2>\n

    Send the paper\/board grade, printed ink and cure age, varnish chemistry\/solids, current additives, application and coat weight, drying\/UV conditions, observed defects, stack conditions, and wetting, gloss, rub, block, slip, adhesion and converting requirements. Ask Longchang Chemical to compare 2100, 3432 or 3062<\/strong><\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

    A practical CHLUMICRYL\u00ae shortlist for paper-varnish buyers who need to separate paper-surface wetting, visible-face leveling, and anti-sticking handling before scale-up.<\/p>","protected":false},"author":6,"featured_media":10868,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10867","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\nPaper Varnish Additives: Wetting, Leveling & Rub<\/title>\n<meta name=\"description\" content=\"Choose paper varnish additives for wetting, leveling or verified foam while protecting cure, rub, blocking and converting. 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