And indeed we needed courage to finish this one, it was about not less than 9 layers, and 4 days of work!
Here is the process: first, I had an illustration on the computer. Then
we needed to separate the colors in photoshop, including black. We
transformed each layer in plain black, and then we printed it on a
tracing paper. Then, we put this paper on a screen of mesh, which has a
thin layer of special product on its surface made to close entirely the
mesh. Then we switch on a light to warm it up, then the screen is open
only in the shapes we need, because its loosing the product under the
black areas. Then, we need to remove entirely the product that remains
in the shapes with water. We make it dry, and the screen is ready for
printing. It has holes in the shapes of the colors, so the paint is
leaded by those shapes to go through.
We fix it, we search for the good color and we just have to print ,
until the next layer, where we need to clean the screen of the previous
color, and so on until the last layer. The problem with this process is
that I had to mix all the colors by eye. For the other grannies, we
splitted the channels on photoshop to have some CMYK layers (Cyan,
Magenta, Yellow and Black), then we transformed each color into bitmap
to have some dots instead of plain color. The colors will mix together
easily through the 4 layers and recreate the original colors thanks to
the various density of those dots. Like those old comic strips of the
50′s!And so, for the day of change (Dan za spremembe), the 28 of march, I put one granny per table, then people (real grandmas and also grandpas) could choose the table according to the granny. In the same time, they were choosing their team for the quiz of Infopeka ! After this event, each of them had one post card granny. Thanks a lot again to Infopeka and the team, and the CGU, and to all the people who helped me in this adventure.
Cécile Bondon