Ozalid process

Ozalid process

The ozalid process is a process of printing positive images on paper from patterns on film or other translucent media. It is akin to creating a photogram, using chemically treated paper.

A transparent film with the pattern to be printed is placed on a diazo compound coated paper. This sandwich is exposed to ultraviolet light. After a 15 sec to 5 min exposure, ammonia vapour is used to develop the film image on to the paper.

Its main use was for making copies of electrical, mechanical and civil engineering drawings. It is still used widely in developing countries. It is also used for proofing, as it produces an image very close to the finished work.

This process produces a blue or black image on a white paper. It is a monochromatic copying process.

History of OZALID as a trademark

OZALID was first federally registered in the United States as a trademark on February 5, 1929 as a brand for light-sensitive copying and photographic papers. The registration currently is owned by R.Q.O. Holding Company, Inc. of New York, and is related to the even earlier registration of October 11, 1923 in what is now the Federal Republic of Germany.[1] The R.Q.O. Holding Company also owns a United States trademark registration for OZALID for "copying and reprographic machines, apparatus and parts thereof." [2]

However, compound "Ozalid Process" appears never to have been registered as a trademark, and the use of OZALID specifically for the Ozalid process using diazo compound paper is not currently registered as a trademark at least in the United States. OZALID as a mark for "machines for diazo type prints" was first registered in the United States in 1938 and is now expired.[3] Similarly, another registration for the use of OZALID for Light-Sensitive Diazotype Papers, Cloths, Films, etc., Machines for Photoprinting Thereon, Machines for Developing the Photoprints Thus Produced and Parts of Such Machines was first registered in the United States in 1942, and also has expired.[4]

Accordingly, OZALID may have become descriptive of the Ozalid process, and no longer uniquely associated with any one source, at least in the United States. Trademark rights, may, however, continue in the United States on a State registration or "common law" unregistered basis, even after a federal registration expires.

See also

References

  1. ^ Serial 71260891, United States Patent and Trademark Office
  2. ^ Serial 73798177, United States Patent and Trademark Office
  3. ^ Serial 71402949, United States Patent and Trademark Office
  4. ^ Serial 71448001, United States Patent and Trademark Office

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Look at other dictionaries:

  • Ozalid — /oz euh lid/ 1. Trademark. a process for reproducing line drawings, manuscripts, and the like on a sensitized paper developed by ammonia vapor. n. 2. (sometimes l.c.) a reproduction made by this process. adj. 3. (sometimes l.c.) of or pertaining… …   Universalium

  • Ozalid — /oz euh lid/ 1. Trademark. a process for reproducing line drawings, manuscripts, and the like on a sensitized paper developed by ammonia vapor. n. 2. (sometimes l.c.) a reproduction made by this process. adj. 3. (sometimes l.c.) of or pertaining… …   Useful english dictionary

  • Ozalid — ☆ Ozalid [äz′ ə lid΄ ] [arbitrary coinage] trademark for a machine or process for producing positive prints made directly from original drawings or printed material and developed dry in the presence of ammonia vapor n. [o ] such a print …   English World dictionary

  • Ozalid® — /ozˈə lid/ noun 1. A method of duplicating printed matter onto chemically treated paper 2. A reproduction made by this process …   Useful english dictionary

  • Ozalid — Oz•a•lid [[t]ˈɒz ə lɪd[/t]] 1) pri trm Trademark. a process for reproducing line drawings, manuscripts, and the like on a sensitized paper developed by ammonia vapor 2) pri a reproduction made by this process …   From formal English to slang

  • ozalid — n. printing process in which a drawing or writing is transferred to a sensitized paper and is developed using ammonia vapor …   English contemporary dictionary

  • Ozalid — [ əʊzəlɪd, ɒz ] noun trademark a photocopy made by a process in which a diazonium salt and coupler are present in the paper coating, so that the image develops in the presence of ammonia. Origin 1920s: by reversal of diazo and insertion of l …   English new terms dictionary

  • Océ — N.V. Type Naamloze vennootschap Traded as Euronext: OCE …   Wikipedia

  • Whiteprint — is the commercial terminology to describe document reproduction using the diazo chemical process. It is also known as the blue line or blue line process. There are two components in this process: The diazonium salt: a light sensitive chemical The …   Wikipedia

  • Music engraving — Sample of hand copied music manuscript, in ink, of a piece composed for piano. Music engraving is the art of drawing music notation at high quality for the purpose of mechanical reproduction. The term music copying is almost equivalent, though… …   Wikipedia

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