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Lloyd Godman
Alternative
Photographic Processes - (Hand
made photographic -emulsions and processes)
Handling
and Measuring Chemicals
Like any
chemical process that requires the measuring and mixing of chemicals the
more accurate the measurements, mixing and application the more constant
the results will be. If you experiment with variations to the chemical
mixes, processing etc. maintaining accurate records that allows you to
repeat any successful results is essential. Keeping mixing beakers, brushes
and other equipment washed and clean after use also gives constancy to
the process reducing contamination.
Decanting
Chemicals:
Handling
chemicals with bare hands is also another dangerous practice,
since the chemicals can easily pass through the skin and are absorbed
into the bloodstream. Rubber gloves will act as a barrier for
your hands. |
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Some of
the base chemicals are fine powders and as these dangerous powders can
become airborne, it is good practice to decanter these with a mask on
or contained in a fume cabinet. In any case, use a clean decanting spoon
specifically marked for this purpose. The usual method is to use a chemical
spoon, to take the chemical from the jar to the mixing container, tip
it from the spoon into the container until the desired amount is measured.
Make sure the containers to place chemicals in are clean and dry so some
can be poured back into the stock jar if too much is decanted out into
the mixing container. Do not use spoons or containers used to hold food
or drink.
Measuring
Chemicals:
Electronic
scales are very good for measuring chemicals but a good
set with the capability of measuring small amounts of chemical can
be expensive. Also some have a switch on the to convert the reading
from ounces to grams and you need to be careful it is set on the
right setting. |
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A
set of mechanical balance style scales with weights can be obtained
quite cheaply and are surprisingly accurately. |
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Want to learn more? - do a workshop or one on one with Lloyd Godman
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