General Concepts 2 min read
Color Sensitizing
The radiation sensitivity of silver halides ends for all practical purposes at about 525 mm . In Figure 3 Curve…
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Photographic Emulsion Preparations
The exact methods used in preparing commercial photographic emulsions are closely guarded trade secrets, but the basic procedures are well…
General Concepts 3 min read
Gelatin – The Film Matrix
Gelatin is a protein extracted from animal hides, bone, and sinew that belongs to the class of substances known as…
General Concepts 2 min read
The Latent Image and Image Development
The silver halide process is by far the most important of all of the radiation-sensitive photographic systems in use today.…
General Concepts 4 min read
Photochemistry of Silver Salts
To understand the fundamental chemistry of silver-based photography, we must look at the photochemistry of silver salts. A typical photographic…
General Concepts 2 min read
A Brief History of Black and White Silver Halide Photography
Perhaps the earliest reference to the concept of silver-based black and white photography is that of J. H. Schulze who…
General Concepts 2 min read
Chemistry of Photography
While it is easy to make comparisons between the pupil of the eye and the f-stop of a camera or…
General Concepts 6 min read
Space Technology
The use of heat pipes has been mainly limited to this field of science until recently, due to cost effectiveness…
General Concepts 2 min read
Working Principle and Applications
Inside the container is a liquid under its own pressure, that enters the pores of the capillary material, wetting all…
General Concepts 6 min read
Design Considerations
The three basic components of a heat pipe are: 1. the container 2. the working fluid 3. the wick or capillary structure Container …
General Concepts 1 min read
What is a Heat Pipe?
A heat pipe is a simple device that can quickly transfer heat from one point to another. They are often…
General Concepts 2 min read
Cunningham Method
Experiments carried out by RG Cunningham and published by ASME in July 1951 clearly demonstrated that the assumption of a…