--Contributed by Thomas E. Dobbins, Glenbrook, Conn.
** Building a Small Photographic Dark Room [26]
In building a photographic dark room, it is necessary to make it
perfectly light-tight, the best material to use being matched
boards. These boards are tongued and grooved and when put together
effectually prevent the entrance of light.
The next important thing to be considered is to make it
weather-tight, and as far as the sides are concerned the matched
boards will do this also, but it is necessary to cover the roof
with felt or water-proof paper.
The best thickness for the boards is 1 in., but for cheapness 3/4
in. will do as well, yet the saving is so little that the 1-in.
boards are preferable.
The dark room shown in the accompanying sketch measures 3 ft. 6
in. by 2 ft. 6 in., the height to the eaves being 6 ft. Form the
two sides shown in Fig 1, fixing the crosspieces which hold the
boards together in such positions that the bottom one will act as
a bearer for the floor, and the second one for the developing
bench. Both sides can be put together in this way, and both
exactly alike.
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