Some Old Blue Prints Have White Lines On Blue Paper

Some Old Blue Prints Have White Lines On Blue Paper – In present times, it is no. The two iron salts do. There have been a lot of modern day processes and technologies used to replace blueprinting. Technical drawings of architectural or engineering designs always seem to consist of white images and text on blue paper.

Traditional blueprints became obsolete when less expensive printing methods and digital displays became available. Most blueprints are negatives, with white image/text lines on a dark blue background, but sometimes positive images were also created to allow for easier reading. The paper is coated with a solution of two soluble iron (iii) salts. This process is what is now replicated in modern times by computer aided printing technologies.

Some Old Blue Prints Have White Lines On Blue Paper

I was sitting here looking at some engineering drawings i printed out thinking how much cooler they would be if they were white ink on blue paper… Bright white, some yellowing common image/lines monochrome (violet or blue, most common) description hectograph image/text is commonly purple or blue color, but it can. It started out in the 1940s when the original blueprint being replaced by blue lines on white paper.

Blueprints use the cyanotype process invented by the astronomer john herschel in 1842. It’s because of how those. Surely in today’s world of inexpensive printers and plotters we can crank out as many copies of a blueprint as we need, but as a regular black or blue line drawing.

This technique produces blue lines on a white background. And that is how a blue print got its name. The paper would then be dunked in a vat of potassium ferrocyandie, and the resulting image would be white lines on blue paper;

Wherever the light can’t shine.

Scraping the 80's off a MidCentury Saul Zaik The Original Blueprints