Technical Documentation

Technical Data Sheets

Typical values for all Vistamatt matting agent grades. Data is based on standard production batches — actual batch COA may vary within specified tolerances.

Leather Leather & Synthetic Leather

Grade	D50 (µm)	D10 (µm)	D90 (µm)	SiO₂ (%)	BET (m²/g)	Oil Abs. (g/100g)	pH (5% slurry)	Moisture (%)	Bulk Density (g/cm³)	Whiteness
VS131A	3.35	2.4	4.6	97.5	185	220	6.8	5.0	0.32	94.5
VS321A	2.25	1.5	3.2	98.0	280	280	7.0	4.8	0.28	95.0
VSKD721	2.25	1.5	3.1	98.2	290	290	7.1	4.6	0.27	95.2
VS331S	3.35	2.3	4.5	97.0	195	230	6.5	5.2	0.33	94.0
VS341S	4.25	3.0	5.6	96.5	145	185	6.3	5.5	0.36	93.5
VS3851	8.5	6.5	11.0	99.5	230	350	7.0	3.6	0.08	97

Leather application note

Fine-particle grades (VS321A, VSKD721) deliver smooth matte on thin leather coatings. Coarser grades (VS3851) are used where deep matte and soft-touch feel are both required. All grades compatible with solvent-borne, waterborne and PU leather systems.

UV Wood UV Wood & Panel Stability

Grade	D50 (µm)	D10 (µm)	D90 (µm)	SiO₂ (%)	BET (m²/g)	Oil Abs. (g/100g)	pH (5% slurry)	Moisture (%)	Bulk Density (g/cm³)	Whiteness
VS141S	3.90	3.0	4.9	97.2	165	205	6.6	5.0	0.34	94.2
VS641	4.00	2.9	5.3	97.0	160	200	6.5	5.1	0.34	94.0
VS370U	7.15	5.2	9.2	96.3	105	155	6.4	5.6	0.38	93.8
VS3550U	5.75	4.0	7.5	96.5	125	170	6.3	5.4	0.37	93.5
VS6907	8.25	6.0	10.5	96.0	90	135	6.2	5.8	0.41	93.2

UV wood application note

S-series grades (VS141S, VS641) are surface-treated for excellent dispersion in UV-curable acrylate systems with minimal viscosity impact. U-series (VS370U, VS3550U) offer higher matting efficiency for roller and curtain coating applications.

Industrial Industrial & Metal Matting

Grade	D50 (µm)	D10 (µm)	D90 (µm)	SiO₂ (%)	BET (m²/g)	Oil Abs. (g/100g)	pH (5% slurry)	Moisture (%)	Bulk Density (g/cm³)	Whiteness
VS171S	7.25	5.2	9.4	96.5	100	150	6.3	5.6	0.39	93.5
VS361C	6.35	4.5	8.3	96.2	115	165	6.4	5.5	0.38	93.6
VS381C	8.15	6.3	10.2	95.8	82	125	6.1	5.9	0.42	92.8
VS391C	9.25	7.2	11.5	95.5	70	110	6.0	6.0	0.44	92.5

Industrial application note

C-series grades designed for high-solids industrial coatings, coil coatings, and metal decorating inks. Larger particle sizes deliver maximum matting efficiency at lower addition levels. Excellent settling resistance due to optimized particle size distribution.

Waterborne High-Clarity Waterborne Matting

Grade	D50 (µm)	D10 (µm)	D90 (µm)	SiO₂ (%)	BET (m²/g)	Oil Abs. (g/100g)	pH (5% slurry)	Moisture (%)	Bulk Density (g/cm³)	Whiteness
VS351C	3.50	1.8	5.5	97.8	210	250	6.8	4.9	0.30	94.8
VS651	5.05	3.6	6.6	96.8	140	180	6.4	5.3	0.35	93.8
VS660	5.2	3.7	6.7	99.5	280	290	6.9	3.8	0.11	97

Waterborne clarity note

C-series waterborne grades feature surface treatment optimized for high-clarity clear coats. Low haze, excellent transparency retention, and easy dispersibility in waterborne acrylic/PU systems without stabilizers.

Deep Matte Premium Deep Matte Surfaces

Grade	D50 (µm)	D10 (µm)	D90 (µm)	SiO₂ (%)	BET (m²/g)	Oil Abs. (g/100g)	pH (5% slurry)	Moisture (%)	Bulk Density (g/cm³)	Whiteness
VS1650A	6.4	4.8	8.0	99.5	280	290	6.9	3.8	0.11	97
VS361C	6.35	4.5	8.3	96.2	115	165	6.4	5.5	0.38	93.6

Deep matte note

High-efficiency deep-matte grades for premium applications requiring gloss below 10 GU @ 60°. Optimized particle shape delivers maximum light scattering with minimal impact on mechanical properties.

Soft-Touch Flexible & Soft-Touch Matting

Grade	D50 (µm)	D10 (µm)	D90 (µm)	SiO₂ (%)	BET (m²/g)	Oil Abs. (g/100g)	pH (5% slurry)	Moisture (%)	Bulk Density (g/cm³)	Whiteness
VS331S	3.35	2.3	4.5	97.0	195	230	6.5	5.2	0.33	94.0
VS341S	4.25	3.0	5.6	96.5	145	185	6.3	5.5	0.36	93.5
VS370T	7.15	5.2	9.2	96.3	102	152	6.2	5.7	0.39	93.4
VS3851	8.75	6.5	11.0	96.0	95	140	6.2	5.8	0.40	93.0

Extended Applications

Inks, textile coatings and film anti-block grades.

Data source. Values in bold for VS660, VS1650A and VS3851 are measured results from batch 260716 (sampled 2026-07-16), tested to HG/T 3061-2020. A batch COA is issued with every shipment and is available on request before ordering.

Remaining grades show typical values from standard production. Oil absorption for the three measured grades is reported by the DBP method in ml/100 g; other grades in g/100 g. Bulk density for measured grades is tamped density in g/cm³ converted from g/L. Confirm the current specification for your grade before formulating.

Grade	Application	D50 (µm)	SiO₂ (%)	BET (m²/g)	Oil Abs. (g/100g)	pH	Moisture (%)	Bulk Density (g/cm³)
VS350C	Printing Inks (Gravure)	3.20	97.5	200	240	6.7	5.0	0.31
VS360C	Printing Inks (Coated)	3.60	97.3	180	220	6.6	5.1	0.32
VS370A	Textile Coatings	3.80	97.0	170	210	6.5	5.2	0.33
VS3651D	Textile Coatings	4.00	96.8	160	200	6.4	5.3	0.34
VS1351	Film Anti-Block	5.50	96.5	130	170	6.3	5.5	0.37
VS1551	Film Anti-Block	6.00	96.2	118	158	6.2	5.6	0.38

Parameter Guide

D10 / D50 / D90

Particle size distribution by laser diffraction. D50 = median diameter (nominal grade size). D10/D90 indicate distribution width.

SiO₂ Content

Silicon dioxide purity by gravimetric analysis. Synthetic amorphous silica standard: 95–99%. Higher = fewer impurities.

BET Surface Area

N₂ adsorption method (m²/g). Inversely related to particle size — finer grades have higher surface area. Range: 70–290 m²/g.

Oil Absorption

Linseed oil absorption (g/100g). Correlates with BET. Higher value = greater impact on system viscosity and matting efficiency.

pH (5% slurry)

Aqueous suspension pH. Affects resin compatibility and dispersion stability. Surface treatment agents adjust this value. Typical range: 6.0–7.5.

Moisture Content

Loss on drying @ 105°C (%). Excess moisture can cause agglomeration. Industrial spec: ≤6%. Premium grades: ≤5%.

Bulk Density

Loose bulk density (g/cm³). Finer powders: 0.27–0.33. Coarser grades: 0.37–0.44. Affects packaging volume and shipping cost.

Whiteness

Hunter whiteness / ISO R457. Critical for transparent and light-colored coatings. All Vistamatt grades ≥92.

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