poisons
(52) Photographic solutions contain
caution
many poisonous and dangerous chemi-
cals. It is very easy to contami-
nate one's fingers or cigarettes
with these chemicals. For some
additional information regarding
the mixing of photographic chemicals,
read the information following the
next exercise.
(NO RESPONSE REQUIRED)
EXERCISE
7.
When mixing or storing photographic chemicals, you should regard them as (select one)
a.
being explosive and should handle with care.
b.
being poisonous and should handle with care.
c.
being inflammable and should handle with gloves.
d.
acids and should handle with caution.
INTRODUCTION:
The art of chemical mixing seems simple enough until a slight error is made and some important
negatives are ruined. An inexperienced man should never be placed on a chemical mixing detail unless
under close supervision. Chemical mixing should not be done in an area where sensitized materials are
handled or stored; chemical dust settling on sensitized materials will ruin them. It should be done
where there is sufficient ventilation. The area where chemical mixing is carried out should be kept clean
at all times. If a chemical is spilled, it should be cleaned up immediately.
Requirements for Chemical Mixing:
The utensils used should be clean and all enamelware should be free from chips. Only equipment made
of stainless steel, hard rubber, glass, or enamelware should be used, since there is a reaction with the
chemicals when they come in contact with other types of material such as iron and tin.
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