Instrument used to determine the fineness of grind or the presence of coarse particles or agglomerates in a dispersion.
Instrument used to determine the fineness of grind or the presence of coarse particles or agglomerates in a dispersion.
Used to monitor the production, storage and application of dispersion products manufactured by grinding in the paint, plastics, pigments, printing inks, paper, ceramics, pharmaceutical (e.g. creams), food (e.g. chocolate) and many other industries.
UNE EN ISO 1520
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Standards
UNE EN ISO 1520
Why is it important to control the fineness of grinding in a paint?
Poor dispersion can lead to defects such as loss of gloss, colour variations, sedimentation, uneven texture, reduced hiding power or problems during coating application.
Can a paint have good viscosity but poor pigment dispersion?
Yes. Although both parameters are related to product quality, a paint can have the correct viscosity whilst still containing poorly dispersed particles that affect its appearance and performance.
What range of particle sizes can be assessed using the Hegman scale?
Depending on the model, the Hegman scale allows dispersion levels to be assessed, typically ranging from 0 to 8 Hegman, equivalent to particle sizes ranging approximately from 100 µm to less than 15 µm.
How does poor grinding fineness affect the final appearance of a paint?
Poorly dispersed particles can cause visible defects such as surface roughness, loss of gloss, variations in colour tone, reduced hiding power or even stability issues during storage.
