Q: Can I use the same matting agent for both topcoat and sealer?

Sealers and topcoats serve different functions, so matching grades are not recommended. Sealers at 60–100 µm DFT benefit from coarser grades (d50 5–7 µm) at 2–3% loading for mild sheen control. Topcoats require finer grades (d50 3–5 µm) at 4–6% for precision gloss control. Using a coarse sealer-grade matting agent in a topcoat causes sandpaper-like texture on the final surface.

Q: Why does my matte furniture coating show gloss variation between batches?

Batch-to-batch gloss variation is almost always caused by two factors: inconsistent dispersion time and matting agent moisture uptake. Disperse at 1,200–1,500 rpm for exactly 10 minutes and store matting agent in sealed containers at <60% RH. Wax-treated grades (GMATT 200 Series) are far less sensitive to ambient humidity than untreated precipitated silica, which can shift gloss ±3–5 GU in humid Chinese factory environments.

Q: What is the best matting agent for hardwood floor coatings?

Hardwood floor coatings at 30–50 µm DFT with heavy foot traffic require a matting agent that provides gloss control without compromising abrasion resistance. GMATT 300 Series at 3–4% loading in 2K PU or UV-cured floor systems targets 10–25 GU at 60° while maintaining pencil hardness ≥ 2H. Avoid overloading above 5% — excess free silica weakens the coating matrix and reduces mar resistance.

Question 1

What gloss level is standard for furniture lacquers?

Accepted Answer

Flat/matte furniture finishes target 5–15 GU at 60°, satin finishes 20–35 GU. Chinese OEM export contracts often specify gloss by Gardner scale (G1–G3) which maps roughly to 5–15, 20–35, and 40–60 GU respectively. Measure at 60° for all furniture grades; 85° angle is used for checking near-matte uniformity on dark stained wood.

Question 2

Which GMATT grade is recommended for NC furniture lacquers?

Accepted Answer

GMATT 200 Series is the primary choice for NC (nitrocellulose) and PU furniture lacquers. Its wax surface treatment prevents resin absorption during the short flash-off window of NC systems (typically 3–5 min at ambient), delivering consistent gloss batch to batch. Loading is 4–6% by weight in NC topcoats targeting 5–15 GU.

Question 3

How do I control gloss in UV-cured furniture finishes?

Accepted Answer

UV-cured furniture topcoats present a unique challenge: the matting agent must maintain its surface distribution during the rapid (<5 second) UV cure. GMATT UV Series is optimized for this — its particle size and surface treatment are tuned so the silica migrates to the surface during the liquid flow phase before cure locks the film. Loading is 3–5% at 30–40 µm DFT for 8–20 GU targets.

Question 4

Can I use the same matting agent for both topcoat and sealer?

Accepted Answer

Sealers and topcoats serve different functions, so matching grades are not recommended. Sealers at 60–100 µm DFT benefit from coarser grades (d50 5–7 µm) at 2–3% loading for mild sheen control. Topcoats require finer grades (d50 3–5 µm) at 4–6% for precision gloss control. Using a coarse sealer-grade matting agent in a topcoat causes sandpaper-like texture on the final surface.

Question 5

Why does my matte furniture coating show gloss variation between batches?

Accepted Answer

Batch-to-batch gloss variation is almost always caused by two factors: inconsistent dispersion time and matting agent moisture uptake. Disperse at 1,200–1,500 rpm for exactly 10 minutes and store matting agent in sealed containers at <60% RH. Wax-treated grades (GMATT 200 Series) are far less sensitive to ambient humidity than untreated precipitated silica, which can shift gloss ±3–5 GU in humid Chinese factory environments.

Question 6

What is the best matting agent for hardwood floor coatings?

Accepted Answer

Hardwood floor coatings at 30–50 µm DFT with heavy foot traffic require a matting agent that provides gloss control without compromising abrasion resistance. GMATT 300 Series at 3–4% loading in 2K PU or UV-cured floor systems targets 10–25 GU at 60° while maintaining pencil hardness ≥ 2H. Avoid overloading above 5% — excess free silica weakens the coating matrix and reduces mar resistance.

پارامتر	لاکر NC (مات)	روکش PU (ساتن)	روکش UV	PU پایه آبی
براقیت هدف (60 درجه)	5–15 GU	20–35 GU	8–20 GU	10–30 GU
d50 توصیه‌شده	4–5 µm	3.5–5 µm	3–4 µm	3–5 µm
بارگذاری (درصد وزنی)	4–6%	3–5%	3–5%	4–7%
عمل‌آوری سطح	واکس‌دار	واکس‌دار	واکس/سیلانی	آب‌دوست
محدوده DFT	20–40 µm	30–50 µm	30–40 µm	30–60 µm
گرید توصیه‌شده	سری GMATT 200	سری GMATT 200	سری GMATT UV	سری GMATT WB

عامل‌های مات‌کننده صنعت مبلمان.

لاکرهای NC و PU مبلمان: دستیابی به 5 تا 30 GU در 60 درجه

سطوح مبلمان UV-cure: مات‌کنندگی در پنجره پخت زیر 5 ثانیه

پوشش‌های مبلمان پایه آبی: GMATT WB برای خطوط OEM کم‌VOC

پروتکل پراکنش برای تولید مبلمان حجم بالا

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