User manual

The g lycerine solution may be us ed repeatedly.
Th e tr ays and beak er s hould now be rinsed - out a nd set
away to dr ain and dr y.
When the negati ves are dr y, they are read y for printin g, as
described in
Part I V.
DEFECTIVE NEGATIVES.
By follo wi ng closely th e foregoing dir ections, the novice
ca n mak e seventy-five per cent., or upwa rds. of good n ega -
tives. Sometimes, however, the dire ctions are not followed,
and fa il ur es re sult.
To forewarn the amateur is to forearm him, and we th ere-
fore d escr ibe the common causes of failure.
Under-Exposure.
Caused by makin g sna p shots indoors, or in th e sh ade , or
when th e li g ht is weak, l ate in the day or by clos in g th e lens
too soon on time
expo s ur es.
Over-Development.
Caused by lea ving the n eg ative too l ong in the developer.
In th is case the ne ga tive is ver y s tr ong and inten se by
tran s mitt ed li g ht and r equires a very long time to print.
The r emedy is obvious.
Under-Development.
Caused by r emoval from the developer too soon_
An und e r-developed neg ative differs from an under-expo sed
one in th at it is ap t to be th in a nd full of detai l, inst ead of
har sh and lacking in det ail. If the development is carried on
as bef ore dir ected, this defect is not liable to occur.
Spot s, Streaks, Etc.
Air bells on
the film in the developer or fixing ba th are
liable to ca use s pot s, a nd s tr ea ks are ca u sed by allowing th e
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