Ink comprising silver nanoparticles

A composition of ink based on nanoparticles of silver comprising,

• 1. a compound “a” consisting of silver nanoparticles,
• 2. compounds “e” consisting of a mixture of solvents,
• 3. at least one compound “f” or “g” selected from
• a. a compound “f” consisting of a modified urea or polyurea rheology-modifying agent, and
• b. a compound “g” consisting of an alkyl cellulose or nitro cellulose rheology-modifying agent, or a mixture thereof,
• 4. an optional compound “c” consisting of a dispersing agent,
• 5. an optional compound “d” consisting of a dispersing agent different from the compound “c”,
• 6. an optional compound “b” consisting of a cyclo-octane solvent, a solvent of the ester methyl type of fatty acids, or a mixture thereof, and
• 7. an optional compound “h” consisting of an antioxidant agent in a content lower than 10% by weight, and
• 8. an optional additional solvent “X,
• wherein
• A. the compound “a” constitutes at least 40% by weight of the ink composition,
• B. the compounds “e” consist of
• at least one terpenic alcohol which constitutes at least 20% by weight of the ink composition, and
• of at least one polyol, a derivative of polyol, or a mixture thereof which constitutes at least 5% by weight and at the most 25% by weight of the ink composition, and
• C. the sum of the compounds “a”, “b”, “c”, “d”, “e”, “f”, “g” and “X” constitutes at least 85% by weight of the ink composition.