Improvements relating to the Production of Changing or Transforma- tion Pictures.
Year: 1899

page_text: Date of Application, 18th Mar., 1899-Accepted, 1st July, 1899
Improvements relating to the Production of Changing or Transforma-
tion Pictures.
I, EMANUEL BLOCH, of 8, Aradi-Ülca, Budapest, in the Kingdom of Hungary,
Director, do hereby declare the nature of this invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This invention relates to a process for the production of pictures which either
partially or entirely change according to whether the light is thrown on them
(reflected light) or whether it passes through the pictures (transmitted light).
Pictures are known in which certain peculiar features appear when the light
passes through them which seem different to what they represent when seen
with the light falling on to them but such pictures beyond any such smull
details show nothing but the unaltered main figures. Now it is the object of
this invention to produce pictures which are different in this respect from the
above mentioned pictures.
Pictures producing different effects of light and colours with transmitted light
than with reflected light are also known, but the representations or the subjects
remain nevertheless the same for any light.
Pictures produced by this improved process however represent entirely dif-
ferent configurations, even quite different subjects with transmitted light, that
is to say either certain parts of the picture or the whole of it can only be seen
with a certain light while other parts or a completely new picture is seen with
another light.
The improved method is as follows:
On a suitable translucent material for use as a backing of any desired form,
such as paper film, ivory and the like is painted a picture in one or more colours
and in a well known manner, say an inanimate object or one or more figures
representing living beinga, or a combination of both. The parts of the picture
which are not to appear with transmitted light are painted in much lighter
shades than the parts required to be seen in both lights. On the back of this
film all the parts which should not appear with transmitted light and which parts
have moreover been painted in light shades, are painted over with strong and
opaque colours, while the parts required to be seen only with transmitted light
are painted in light shades.
If it be desired to show a totally different picture with transmitted light than
with reflected light it is necessary to paint in light shades the whole picture to
be seen with the reflected light on the front of the translucent material or back-
iug, and to paint in strong opaque colours on the back of the said material or
backing the picture to be seen by the other light, while at the same time making
use as far as possible of the lines of the front picture.
The rear of this picture is in both cases provided with a suitable covering
leaf conveniently secured in position.
By causing separate parts of the picture especially portions or the whole of the
limbs arranged in a certain position, to appear under a different light in quite

page_text: another position or to disappear altogether from view, it is possible, by suitably
moving the picture round to and fro or up and down in front of the light, to
produce the optical delusion of the said portion or limbs being kept moving from
one position into the other.
Pictures produced according to this method may be used for various purposes,
for example in the decoration of correspondence and business cards.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. Method for producing transformation pictures, characterized in that the parts
of the picture desired to appear with reflected light but to disappear with trans-
mitted light are painted on the front of a translucent backing and in lighter
shades than those parts that are to appear with transmitted light, and that the
former are also painted over at the back with thick paints, while the parts of
the picture desired to appear with transparent light but to disappear with
reflected light are painted on the back and finally covered by any suitable means.
2. The production by the method claimed in Claim 1 of changing or transfor-
ination pictures which with reflected light completely differ from that seen withi
transmitted light characterized in that the picture desired to appear with reflected
light is painted in light shades on the front, of a translucent backing while the
picture desired to appear with transmitted light is painted in heavy, opaque
colours on the back by causing it to coincide with any suitable lines and outlines
of the first picture and finally covering it by any convenient means.
Dated 1. 101
1
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.