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The equipment needed for the realization of digital negatives is fairly simple. Just a computer, software, image processing, a printer and InkJet Transparency, a digital camera and / or a scanner.

Computer : Whatever brand it is necessary that the capacity sufficient to handle the largest files that you intend using. The use of 2 screens and a graphics facilitates the work of the image. But this is not the subject of this ebook and there are other books and specialized spaces on the net about it.

software : To my knowledge 3 software makes it easy to apply curves and colors to images Gimp and Photoshop (Adobe) Photoshop Elements and (Adobe). I will describe the precise methods of working with these 3 software.

Printer : All inkjet printers can be used, except if there are mechanical problems associated with the use of transparencies. According to the inks will be more or less easy to make negatives for processes that require high density. It is clear that business models are more economical in consumable and also more reliable. But this does not mean that entry-level model is not usable. In addition there are systems that allow continuous feeding of economy and also make use of better quality inks. The ink is an important parameter for achieving the digital negative, a safelight will allow to use more or less ink.

For now many people use the equipment to achieve the Epson digital negative, but it is possible to make negative with any inkjet printer. It is true that 3800 is a good solution for money, but there are solutions such as schedules 1400 with the K3 ink Mr. Cone. But tests that I practice with tracer HP and Canon are very prometeurs.

In fact more than the printer is ink which is important. According to its quality we will be able to manage the inking more finely. J'eclaircirai this technical section in the chapter on the selection of color. Finally

with printers and ink it is also necessary to note that some models offer a print mode NB quality, or printer can be modified with NB quality. It's a slightly different way of working which also results in very good qualities.

The Transparent : This is the medium that has most evolved in recent years that allows the evolution of printers and inks produce negatives of very good quality, comparable to the negative enlarged so silver. There are different type of transparency, some are still old building and do not support an over-inking and do not handle a slight inking too. Some of these anciennnes fabrications are still usable for processes that are not too defined as gum bichromate.
I will present only the media and opaque transprent very good qualities that offer better definitions and better management of the inking.

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Introduction Theory process

photographic processes are sensitive to light. Until now we used, most often, a negative film consists of millions of silver grains more or less large and more or less dense. It exposed the paper to the negative light by interposing between the two, and you got a contact or larger, according to the method. To adapt to different negative contrasts were used papers of various grades or emulsions of different contrasts.

The digital negative is based on the ability to recreate an inkjet printer similar to a negative silver negative. This is to simulate the silver grain and the various aspects of the film using an inkjet transparency, software for image processing and an inkjet printer. But unlike the negative silver must manage a new parameter, the inking.

Following a protocol setting we will find:
- the color most safelight, without over-inking, for the process that we use.
- the curve to be applied to simulate the contrast of the negative

This will allow us to make prints from both of our negative silver as our digital files.
In practice, after the first test period, it will suffice to apply your digital file has some modifications, to ultimately obtain a perfect negative contact.

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Although known for a while, and despite the good results that this method allows the negative "digital" is still little used.

Yet more than a working method or a choice, the negative "digital" is a solution to produce prints using methods "alternative" or make mass production.

This method allows for the link between technology, ease of acquisition of control that gives us the digital and visual quality of traditional printing techniques.

Indeed all the calibration work is digitally controlled it becomes impossible miss a tirage.On reduces losses and allows the process to work more complex or expensive as platinum, palladium

By no means do I compare the results obtained with this method with direct contacts. But this method will give as good results as those obtained with silver internegatives.

For those who want to explore alternative methods this method allows them to work without the need for darkroom (useless for most of the alternative processes)

This book describes in simple and precise steps to follow to obtain negative perfect and discover the pleasure derived from the realization Drawing with alternative processes.