Color change of printed surfaces due to a clear coating with matte finishing - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Color change of printed surfaces due to a clear coating with matte finishing

Résumé

When a clear layer is coated on a diffusing background, light is reflected multiple times within the transparent layer between the background and the air-layer interface. If the background is lit in one point, the angular distribution of the scattered light and Fresnel's angular reflectance of the interface induces a specific irradiance pattern on the diffuser: a ring-like halo. In the case where the background is not homogenously colored, e.g. a halftone print, the multiple reflection process induces multiple convolutions between the ring-like halo and the halftone pattern, which increases the probability for light to meet differently colored areas of the background and thus induces color change of the print. This phenomenon, recently studied in the case of a smooth layer surface (glossy finishing) is extended here to rough surface layer (matte finishing) in order to see the impact of the surface roughness on the ring-like halo, and thereby on the print color change. A microfacet-based bi-directional reflectance distribution function (BRDF) model is used to predict the irradiance pattern on the background, and physical experiments have been carried out for verification. They show that the irradiance pattern in the case of a rough surface is still a ring-like halo, and that the print color change is similar to the one observed with a smooth interface by discarding the in-surface reflections which can induce additional color change.
Fichier principal
Vignette du fichier
2023 LIM Dailliez halo effect rough surface.pdf (588.65 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04146250 , version 1 (29-06-2023)

Identifiants

  • HAL Id : hal-04146250 , version 1

Citer

Fanny Dailliez, Mathieu Hébert, Lionel Simonot, Lionel Chagas, Anne Blayo, et al.. Color change of printed surfaces due to a clear coating with matte finishing. London Imaging Meeting 2023, IS&T, Jun 2023, London, UK, United Kingdom. ⟨hal-04146250⟩
38 Consultations
41 Téléchargements

Partager

Gmail Mastodon Facebook X LinkedIn More