. . "a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver"@en-us . "reducing agent"^^ . "reducer"@en-us . . . . . . . . "reducing agent"@en-us . "0.25"^^ . . . "0"^^ . "114780267"^^ . "110598803"@en-us . . . "113937517"@en-us . "reductant"@en-us . "14780267-n"^^ . .