Some colour at Warwick Farm practice 2nd May 1970
Peter Manton & Norm Beechey
Pete Geoghegan waiting to get around ?
Again & ?
Brian Foley & Jim McKeown
The spot on the back of J Mc's car, & two others above the cars, is the result of a processing problem I had when developing Camcolour
slides at home.
For those who might be interested, I suffered from using my oldies' laundry as a darkroom.
The water pipes in the house were galv & pretty well corroded. My wash water was full of little specks
of rust, which stuck to the emulsion on the film when it was washed after the first developer.
The low water pressure meant that the rust gently flowed into the tank, & wouldn't wash out.
At that stage the surface of the film was very soft, being a multiple layer emulsion,
& there was nothing else I tried which would wash the rust away, without destroying the surface.
When the bleach in the later process hit the rust, it turned it into these rather annoying & permanent little spots.
They used to look really bad when projected up on a screen!!
Black & white emulsion was much thinner & didn't seem to pick up the particles of rust.
In the end, the old man decided the water pressure was too low for other uses, & had the pipes replaced in copper.
That stopped my "spot" problem, but I had to make sure I didn't blow the emulsion away with the extra pressure,
which had the water jetting into the tank like a fire hose.
Edited by lyntonh, 13 February 2012 - 11:01.