National Geographic Magazine Press was making excellent job before they are changed from Slide Film to Digital Photography , before started to investing soy bean inks , before investing worse photographers and their worse equipment . This was may be 15 years ago , everything changed.

Now lets bring these old days to today again.

They were using rotogravure presses or german name tiffduck process similar to dye transfer process. Rotogravure presses were using copper plates to print the media and these copper plates were covered with different depth and different size holes.

When they feeded with ink, shadow areas were presented with larger size and greater depth of holes with elliptical shape.This was similar to dye transfer where the shadow areas thicker at matrix.

Rotogravure uses gelatin coated copper where gelatin acts exactly same but negative as traditional dye transfer matrix where shadow areas thinner on gelatin and acid etches the screening in to copper with thinner gelatin etches more , thicker gelatin etches less , shallower.

I am thinking to use thick polyester film as copper plate. Acid will be injected on to polyester film with inkjet printer and rest was easy.

Can I inkjet square or elliptical screening on to polyester ? Or must it be a 1 bit screening ? And other idea is to use palladium toner as ink at the tiffdruck process.

Mustafa Umut Sarac

Istanbul