General Concepts 6 min read
Photographic Emulsion Preparations
The exact methods used in preparing commercial photographic emulsions are closely guarded trade secrets, but the basic procedures are well…
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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…
General Concepts 2 min read
Flow through Orifice Plates in Compressible Fluid Service at High Pressure Drop
The calculation of compressible flow through orifice plates at high dP (critical flow) appears to be carried out incorrectly in…