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Blueprints use the cyanotype process invented by the astronomer John Herschel in 1842. The paper is coated with a solution of two soluble iron(III) salts - potassium hexacyanoferrate(III) (potassium ferricyanide) and iron(III) ammonium citrate.

Blueprints use the cyanotype process invented by the astronomer John Herschel in 1842. The paper is coated with a solution of two soluble iron(III) salts - potassium hexacyanoferrate(III) (potassium ferricyanide) and iron(III) ammonium citrate.

By the 1970s, those in the industry found that the diazo process worked faster on documents with blue lines and, ultimately, that it created a clearer drawing. Thus, for an easier-to-read image, drawings started having a solid white background, and blue lines delineated the image.

A blueprint's signature hue is tied to a chemical process. In 1842, an English photographer, chemist and astronomer named John Herschel discovered that combining ferric ammonium citrate and potassium ferricyanide created a chemical reaction and a compound called blue ferric ferrocyanide (or Prussian blue).

The blueprint process uses a photosensitive ferric compound, which allows the image to be printed on a piece of paper. It is then dried and developed by using a solution that gives it a distinctive blue color. It's a relatively simple process, and it has several features that made it useful.

The process of blueprint printing takes several steps. Once the high-quality scans have been taken of your original drawing, the blueprints are typically printed on professional-grade, rolled bond paper using wide-format printers. In most cases, 20 lb bond paper is used.

Vellum is what many know as traditional blueprint paper, and it is commonly used for architectural and engineering plans for black-and-white blueprints. It is also possible to print blueprints on Mylar paper, which is transparent or frosted, by using a laser process.

Architects have traditionally used tracing paper since light can pass through it from its low opacity. However, architects also commonly use other paper for different designs like layout paper and sketch paper. Architects these days also use plotter paper, which works hand-in-hand with plotter machines.

Blueprints use the cyanotype process invented by the astronomer John Herschel in 1842. The paper is coated with a solution of two soluble iron(III) salts - potassium hexacyanoferrate(III) (potassium ferricyanide) and iron(III) ammonium citrate.

Blueprints use the cyanotype process invented by the astronomer John Herschel in 1842. The paper is coated with a solution of two soluble iron(III) salts - potassium hexacyanoferrate(III) (potassium ferricyanide) and iron(III) ammonium citrate.

By the 1970s, those in the industry found that the diazo process worked faster on documents with blue lines and, ultimately, that it created a clearer drawing. Thus, for an easier-to-read image, drawings started having a solid white background, and blue lines delineated the image.

A blueprint's signature hue is tied to a chemical process. In 1842, an English photographer, chemist and astronomer named John Herschel discovered that combining ferric ammonium citrate and potassium ferricyanide created a chemical reaction and a compound called blue ferric ferrocyanide (or Prussian blue).

The blueprint process uses a photosensitive ferric compound, which allows the image to be printed on a piece of paper. It is then dried and developed by using a solution that gives it a distinctive blue color. It's a relatively simple process, and it has several features that made it useful.

The process of blueprint printing takes several steps. Once the high-quality scans have been taken of your original drawing, the blueprints are typically printed on professional-grade, rolled bond paper using wide-format printers. In most cases, 20 lb bond paper is used.

Vellum is what many know as traditional blueprint paper, and it is commonly used for architectural and engineering plans for black-and-white blueprints. It is also possible to print blueprints on Mylar paper, which is transparent or frosted, by using a laser process.

Architects have traditionally used tracing paper since light can pass through it from its low opacity. However, architects also commonly use other paper for different designs like layout paper and sketch paper. Architects these days also use plotter paper, which works hand-in-hand with plotter machines.