US 12,169,355 B2
Photographic paper
Wilhelmus Johannes Martinus Der Kinderen, Tilburg (NL); Mattijs De Munnik, Tilburg (NL); Dennis Imre Lubertus Termeczky, Tilburg (NL); and Elisabeth Maria Waltherus Van Limpt, Tilburg (NL)
Assigned to Fujifilm Manufacturing Europe B.V., Tilburg (NL)
Appl. No. 17/995,870
Filed by Fujifilm Manufacturing Europe B.V., Tilburg (NL)
PCT Filed Mar. 23, 2021, PCT No. PCT/EP2021/057426
§ 371(c)(1), (2) Date Oct. 10, 2022,
PCT Pub. No. WO2021/213762, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 2006061 (GB), filed on Apr. 24, 2020.
Prior Publication US 2023/0244134 A1, Aug. 3, 2023
Int. Cl. G03C 1/85 (2006.01); D21H 19/40 (2006.01); D21H 19/72 (2006.01); G03C 1/79 (2006.01)
CPC G03C 1/853 (2013.01) [D21H 19/40 (2013.01); D21H 19/72 (2013.01); G03C 1/79 (2013.01)] 16 Claims
 
1. A photographic paper comprising a base layer having an average surface roughness (Sa) of at least 0.7 μm and an outer-most layer comprising a hydrophilic colloid binder and colloidal silica and one or more light sensitive emulsion layers between the outer-most layer and the base layer, wherein:
(i) the weight ratio of colloidal silica to hydrophilic colloid binder in the outer-most layer is 0.05:1 to 0.28:1;
(ii) the amount of colloidal silica present in the outer-most layer is in the range of 8 mg/m2 to 225 mg/m2; and
(iii) the colloidal silica has a mean particle size of 3 to 70 nm.