Coated printing paper

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Optical brightening agents Table 3.2 Pronunciation Subdomain (1st level):  Raw materials Subdomain (2nd level):  Papermaking additives Grammatical category:  Complex term Grammar notes:  Countable Context:  Optical brightening agents (OBAs) are compounds added to the paper furnish, that take in radiation in the invisible ultraviolet region of the spectrum and emit it in the visible (blue) region - thus enhancing the apparent brightness of the paper and offsetting its natural yellowness. Context source:  EN 10 Attestation:  2 Co-hyponyms:  Basic dyes, Acid dyes, Direct dyes, Tinting dyes Hyperonyms:  Dyes Synonyms:  Fluorescent whitening agents Variants:  OBAs, Optical brighteners It:  Candeggianti ottici Degree of reliability IT:  3 Fr:  Agents fluorescents Degree of reliability FR:  3