View Full Version : Color Posterization.. .. .. .. >

06-13-2007, 07:00 PM
USED TO be a painstaking process in the darkroom using Litho Film

now in photoshop just a few clicks..! WowoW !

My very first published image. Was published in Camera35 Photomagaine in 1973.

It was an "image" I created in the darkroom, using :

ten high contrast litho neg's

ten high contrast litho pos's]

these were laid out from one to ten in order first the negatives

in a row.. 1 - 10

the opposites of these were placed below those ten

Now we have two rows labled N 1-10 & P 1-10

If I use N 1 & P 1 together.. as "STENCIL" place them together and hold up to light.. NOTHING CAN BE SEEN

because they are exact opposites of one another.

BUT IF I SHIFT Either row just one position I will end up with this

N1 + P2 THAT "stencil" will allow "some light" to pass..now we arrange the rest of the "stencils" or Masks

each stencil or mask is has two items a N & a P

N-1 + P 2 = Mask #1

N 2 + P 3 = Mask #2

N 3 + P 4 = Mask #3

Ok.. now you understand how the full set of Masks is made

there are Nine complete sets.

each set must be able to be "registered" preciisely in the negative carrier

that must be "built" custom made with two registration pins attached to the negative carrier..

The Purpose. is that when you take that negavtive carrer out of the enlarger and take the old set off and put a new set on.. they MUST line up precisely.. if your off by as much as 1/32 of an inch this will not work

they all must be punched by a NON adjustable punch so that every Litho
has the holes in the exact same p lace to provide PROPER REGISTRATION

NOW if you have followed this explanation this is how the "painted print" is made

Using Mask #1 COLORED LIGHT is passed through that mask to EXPOSE THAT SHEET OF PAPER TO "light' only..

so if I want yellow "paint" to show up on this sheet of paper AFTER processing.. I must use BLLUE light everything must be done

"backwards" for the COLOR you want to see in any particular area.

Using Mask #2 a "different" color is used to add more detail to a different part of the image. etc..

By using the opposite of the color you want.. that is what you must use for color filters to get the result you want.

Here are a few "Before & After examples: