A PHOTOGRAPH IN NATURAL COLOURS. 
49 
that, the subject is a rose tree, clad with foliage, and adorned 
with red flowers. Their negatives must be obtained by super- 
position from one original ; all but the flowers, the trunk, and 
the leaves are then respectively stopped out in the separate 
negatives. Three printing 44 formes ” or surfaces are now pre- 
pared — one for each of these negatives ; the printing surface 
being, of course, gelatine, as adopted in the heliotype processes. 
The leaves are first printed, being inked with green. These 
will appear in all the beautiful delicacy, and with all the struc- 
tural detail visible in the original tree. When the requisite 
number — hundreds or thousands — of impressions has been 
printed, the printing surface is removed (one press only is now 
supposed to be employed), and a second 44 forme,” representing 
the flowers, is inserted in the bed of the press. This is inked 
with a transparent red lithographic ink the colour of the flower ; 
and the partially-printed proofs are sent through the press a 
second time, care being taken to keep correct register. A third 
time the operation is repeated, so as to introduce the brown 
colour of the trunk and branches. If necessary, colours may 
be made to overlap. 
What we have said about the printing of flowers applies 
equally to that of landscapes, portraits, and indeed to every- 
thing that can be represented by photography. 
VOL. XIII. — NO. L. 
E 
