Photographic gelatin to realize the sensitive layer of printing collotype
Gelatin reticulation
The réticulation occurs all the times when the gelatin, inflated by the water, until occupy a volume upper to the one that it occupied during […]
Gelatines
Gelatin fragile material
There are several grades of photographic gelatins : In a past still close enough, it seems that there was a range of hardness of this […]
Photographic gelatin
One of the materials the most important for the collotype is the gelatin. It establishes the photosensitive stump which is going to be transformed into coat printer. Once moistened, it will push away the ink in the parts not insolated, and will hold it in the parts establishing the image…