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What is the process where the drawing is placed face-up on a printing paper sensitized with light sensitive diazo compounds and exposed to the sun or ultraviolet lights?
What is the process where the drawing is placed face-up on a printing paper sensitized with light sensitive diazo compounds and exposed to the sun or ultraviolet lights?
Direct Contact Positives
What is the method where the map manuscript is laid next to iron sensitized paper and exposed to sunlight or special lights, causing some distortion upon development?
What is the method where the map manuscript is laid next to iron sensitized paper and exposed to sunlight or special lights, causing some distortion upon development?
Direct Contact Negatives
What is the purpose of using a weak solution of caustic soda in the blueprint process?
What is the purpose of using a weak solution of caustic soda in the blueprint process?
It is used as an ink to produce white lines.
In which process is a relatively few inexpensive copies of a prepared map manuscript obtained?
In which process is a relatively few inexpensive copies of a prepared map manuscript obtained?
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