finding: Photolab Safelight

information on many stages of the photolab are best found by asking the internet. You may not have a full library, nor have ready access to someone from last century. All the major manufacturers wrote guides, pamphlets, even books to provide you full reliable, useable information about their products. There were also the standard 3rd party references: British Journal of Photography, Photo-Lab Index.

As an example of google search phrase: “kodak darkroom safelight” — along with simple modification to make: “ilford darkroom safelight.”

This took less than three minutes to find and download. Much less time than going to an internet chat-forum to ask what the safelight for MYPRDODUCT would be.

[ https://webionaire.com/2022/09/02/darkroom-light/ ]

Lost in the weed

follow experts so lost in the weeds they'd have you using an industrial weed wacker to clear a 0.09 acre yard.(not enough room for a tennis court)

References from the Golden Age of petrochemical photography.
Camera technique for Professional Photographers, Kodak Publication No. O-18
Large-Format Photography, Eastman Kodak Company Publication O-18e. ISBN 0-87985-771-4

Stroebel, View Camera Technique
https://archive.org/details/viewcameratechni00stro

Kodak 1952, Camera Technique
https://archive.org/details/cameratechniqueforprofessionalphotographers

https://archive.org/details/basicdeveloping00east

https://archive.org/details/kodak-films/page/n19/mode/2up
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* Type of camera
* parts of camera
* film holder / use
* lens board / mounting
* focusing / aids
* exposing
* processing
* printing
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approach. mode. photography changed in need and use, users
pedagogical mannerisms. 
ask those who told you about focus rules, why those rules fail with movements.
what you are asking, simply, is: how to focus a view camera. Answer is based upon the scene and the seeing.
everywhere or selective somewhere