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Back in the olden days of film and Silver halide, I worked at a professional photo lab. The number one rule every employee is drilled over and over, NEVER open any door unless you are willing to bet your next paycheck that there is nothing on the other side that can be ruined by light.
Just a little bit of light from an open door can ruin thousand dollar roll of paper, or tens of thousands of dollars in customer film.
I ruined a box of 20x24 paper when I forgot to close the lid on the box properly. That was expensive for the company, but the worst was to ruin customer's film, especially a professional's weekend of work.
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Glen
49 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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