blueprint process

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  • The blueprint process is still used for special artistic and photographic effects, on paper and fabrics.
  • The blueprint process was first used for mechanical reproduction of drawings.
  • Introduction of the blueprint process eliminated the expense of photolithographic reproduction or of hand-tracing of original drawings.
  • Whiteprinting replaced the blueprint process for reproducing architectural and engineering drawings because the process was simpler and involved fewer toxic chemicals.
  • Inks which are developed by a chemical reaction may depend on an acid-base reaction (like litmus paper), reactions similar to the blueprint process, or any of hundreds of others.
  • The major disadvantages of the blueprint process, however, included paper distortions caused by the wet process which might render scale drawings less accurately, as well as the inability to make further copies from the blueprints.
  • As with the blueprint process, after sufficient light exposure, the original drawing is removed, the paper washed in a ferrocyanide bath, and then rinsed in an acidic bath to reveal a positive image.
  • Nonetheless, for its efficiency and low cost, the blueprint process, further simplified and mechanized by the turn of the 20th century, became the most widely used reprographic process between the mid-19th century and the latter half of the 20th-century.
  • In 1919 the grandson of Lodewijk, Louis van der Grinten, became interested in the blueprint process used for producing wide-format technical drawings, used in construction, manufacturing, etc.