User manual

minutes the
operator
will
be
able to distinguish objects m
the
picture. The
developer should
be
allowed to act 5 to
10
minutes.
The
progress
of
the
devel-
opment
may
be
watched
by
holding
the
negative, from time to time, up
to
the
lamp.
6.
Transfer
the
developed film to
the
third
tray
and
nnse
two
or
three
times with
water, leaving it to soak while
the
next
film
is
being developed.
Eight
or
ten
negatives
can
be
developed
one
after
the
other
in
one
portion
of
develope.;
then
it
should
be
thrown
away
and
a
fresh
portion
mixed.
Only
one
negative
should
be
developed
at
a
time,
until
the
operator
becomes
expert,
then
he
caD
manage
three
or
four
in
the
tray
at
one
time
and
the
developer
will
answer
for
twenty-four
films
before
being
exhausted.
As
each
successive
negative
is
developed
it
should
be
put,
with
the
preceding
n~gatives.
in
the
washing
tray
and
the
water
changed
twice,
to
prevent
the
developer
remaining
in
the
film
from
staiI\ing
them.
7.
Put
two tablespoonfuls of
the
Hyposulphite
of
Soda
into
the
fourth
tray, fill two-
thirds
full
of
water,
and
stir
until dissolved.
This
is called
the
fixing
bath.
8.
Immerse
the
negatives one
by
one in
the
fixing
bath
until they are entirely
clear
of
white spots
and
are
transparent
instead
of
milky
by
transmitted
light.
This
will
require
about
10
minutes.
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