TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The sterically bulky stabilizer further comprises a surfactant or surface active agent including: derivatives of rosin natural products; long-chain or branched hydrocarbon alcohols; alcohol ethoxylates; acrylic-based polymers; styrene-based copolymers; copolymers of alpha -olefins, copolymers of vinyl pyridine, vinyl imidazole and vinyl pyrrolidinone; polyester copolymers; polyamide copolymers; or copolymers of acetals and acetates. Preferred Components: The nanoscale pigment particles have an average particle diameter of less than 150 nm, as derived from transmission electron microscopy imaging. The benzimidazolone pigment comprises a diazo component group and a nucleophilic coupling component group that are linked together with at least one azo group, where at least one of the diazo component group and the nucleophilic coupling component group comprises a benzimidazolone moiety. The diazo component group is substituted benzene moiety of formula (a1), substituted 4-amino-6-phenylamino-5H-(1,3,5)triazin-2-one moiety of formula (a2), substituted N-phenyl-(1,3,5)triazine-2,4,6-triamine moiety of formula (a3), substituted naphthalene moiety of formula (a4), substituted 1,3-dihydro-benzoimidazol-2-one moiety of formula (a5), or substituted benzene moiety of formula (a6) or (a7). The nucleophilic coupling component group is substituted 3-oxo-N-(2-oxo-2,3-dihydro-1H-benzoimidazol-5-yl)-butyramide moiety of formula (a8) or substituted 3-hydroxy-naphthalene-2-carboxylic acid (2-oxo-2,3-dihydro-1H-benzoimidazol-5-yl)-amide moiety of formula (a9). The sterically bulky stabilizer is associated with the benzimidazolone pigment predominantly by at least one of intra-molecular and inter-molecular hydrogen bonding, aromatic pi -stacking and van der Waals forces. The sterically bulky stabilizer is substituted pyridine compound of formula (I) or (II). The sterically bulky stabilizer compound comprises at least two pyridine groups. The nanoscale pigment particles have an aspect ratio of 1:1-7:1. The nanoscale pigment particles have a shape including rods, platelets, needles, prisms or substantially spherical. (I) includes 44 compounds e.g. pyridine-2-carboxylic acid (2,5-dimethyl-hexyl)-amide, pyridine-2-carboxylic acid (3-(2-nonyl-dodecyloxy)-propyl)-amide, pyridine-2-carboxylic acid (3-(5,7,7-trimethyl-2-(1,3,3-trimethyl-butyl)-octyloxy)-propyl)-amide, pyridine-2-carboxylic acid 2-ethyl-hexyl ester, pyridine-2-carboxylic acid 2-butyl-octyl ester, pyridine-2-carboxylic acid 2-hexyl-decyl ester, pyridine-2-carboxylic acid 2-decyl-tetradecyl ester, 2-decyl-tetradecanoic acid pyridin-2-ylamide, 2-hexyl-decanoic acid pyridin-2-ylamide and 2-butyl-octanoic acid pyridin-2-ylamide.R1-R8 = H, halo, (CH2)nCH3, OH, -OR1a, CO2H, CO2CH3, CO2(CH2)n2CH3, CONH2, (CO)R2a, OCH3, OCH2CH2OH, NO2, SO3H, 4-carbamoyl-phenylcarbamoyl, 2-(2-amino-phenoxy)-ethoxy, 4-carboxy-phenylcarbamoyl or 4-sulfo-phenylcarbamoyl;R1a = H, (CH2)n1CH3 or C6H5;R2a = H, C6H5, (CH2)n3CH3 or (CH2)n1N(CH3)2;n = 0-6;n1 = 1-6;n2 = 0-5;n3 = 0-12;A = -(CH2)n-, -(O-(CH2)n-O)-, -(O-CH2CHR)n)-, -(C=O)-, O, S, -(CH2)n1-(C=O)- or -(C=O)-(CH2)n1-(C=O)-;R = H or CH3, (where asterisk denotes a point of attachment to an amino group in the diazo component precursor and a point of attachment to an azo group in the benzimidazolone pigment);R9-R13 = H, halo, CH3 or OCH3, (where asteriskasterisk denotes a point of attachment to the azo group in the pigment);R23-R24 = H, -NH-(C=O)-R5a, -(C=O)-NH-R5a, -NH-R5a, -NH-(C=O)-NH-R5a, -NH-(C=O)-O-R5a, -O-(C=O)-NH-R5a, -O-(C=O)-R5a, optionally branched alkyleneoxy or -OR5a;R21, R25 = H, -NH-(C=O)-R5a, -(C=O)-NH-R5a, -NH-R5a, -NH-(C=O)-NH-R5a, -NH-(C=O)-O-R5a, -O-(C=O)-NH-R5a, -O-(C=O)-R5a, optionally branched alkyleneoxy or -OR5a, preferably -C(=O)-X-R31;R5a = predominantly linear or branched alkyl or cycloaliphatic group (optionally containing heteroatoms within the alkyl);X = -NH- or -O-;R31 = optionally branched alkyl or cycloaliphatic group (optionally containing heteroatoms), preferably -CH2-CH2-CH2-O-CH2-C((CH2)n6CH3)-(CH2)n6CH3 or -CH2-C((CH2)n6CH3)-(CH2)n6CH3;n6 = 0-30;R1y = bridging group, preferably -(CH2)n6-, -X-(CH2)n6-X, -((XCH2CH2)n6)X-, -((C=O)-(CH2)2-(C=O))-, -X-((C=O)-(CH2)n6-)C=O))-X-, -X-((C=O)-X-(CH2)n6-X-(C=O))-X-, -((C=O)-X-(CH2)n6-X-(C=O))-, -X-C(=O)-(CH2)7-CH((CH2)8-CH3)-CH((CH2)8-CH3)-(CH2)7-C(=O)-X-, -CH2-C(=O)-X-(CH2)8-CH((CH2)8-CH3)-CH((CH2)8-CH3)-(CH2)8-X-C(=O)-CH2- or -X1-C(=O)-X2-(CH2)8-CH((CH2)8-CH3)-CH((CH2)8-CH3)-(CH2)8-X2-C(=O)-X1-;X, X1 and X2 = O, S or NH; andn6 = 1-50. EXAMPLE - 2,6-Pyridine dicarboxylate (1.02 g) and anhydrous tetrahydrofuran (20 ml) were charge into 100 ml round bottom flask and stirred under inert atmosphere. Then oxalyl chloride (2.2 ml) was added dropwise to the suspension followed with N,N-dimethylformamide (3 drop), and stirred for 1 hour. The solvent was removed by rotary evaporation, and the oily residue was dried to give 2,6-pyridinedicarboxylic acid dichloride. Primary amine (4.1 g) and anhydrous tetrahydrofuran (40 ml) were charged into a 250 ml round bottom flask and reaction solution was purged free of oxygen with inert gas. Then reaction solution was cooled to 0 degrees C and a cooled solution of 2,6-pyridinedicarboxylic acid dichloride in 20 ml anhydrous tetrahydrofuran was added slowly and dropwise to the reaction solution containing the amine. Triethylamine (2.5 ml) was added and the reaction mixture was stirred while slowly warming. Then deionized water (10 ml) and ethyl acetate (40 ml) were added to the reaction mixture, and the bottom aqueous layer was removed. The organic layer was washed with deionized water and separated. The solvent was removed by rotary evaporation, and the residual product left behind was dried in vacuum to obtain pyridine-2,6-dicarboxylic acid bis-((3-(2-nonyl-tridecyloxy)-propyl)-amide) (95% yield).