Photographer & Printmaker / A Hybrid Place About Early Photography and Digital Imaging
lass Digitization of film negatives and color slides can be done by means of scanners or digital cameras. This post will show a reproduction station with digital camera derived from a former darkroom enlarger. The original device was an LPL enlarger of 4x5” (10x12.5cm) maximum format. The enlarger head is equipped with a diffusion box …
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La digitalización de negativos o diapositivas se puede llevar a cabo mediante el uso de escáneres o reproduciéndolos mediante cámara con sensor electrónico. En este post se mostrará una estación de digitalización mediante cámara derivada de una ampliadora fotográfica fuera de uso. El instrumento original era una ampliadora fotográfica LPL de formato máximo 4x5” (10x12,5cm). …
Continue reading "Sistema de Digitalización de Negativos y Diapositivas (I)"
Heliogravure has some particular characteristics that don't facilitates the system calibration in order to arrive to a sort of WYSIWYG. Working from a film negative, it is a different experience if the user prints the negative on photographic paper before to perform the heliogravure or passes directly to the heliogravure. In the first option, what …
After some troubles and a quantity of trials with Grayscale step wedges, here is my first Heliogravure image. The plate measures 145x165mm and the image 120x120mm. I have used an stochastic screen digitally designed and printed on high contrast photographic film in a Pre-press service bureau. The digital image was edited in Adobe Photoshop and …
Updated 26/01/2016 Hardening the gelatin. In heliogravure, it is necessary an illumination source rich in ultraviolet (UV) light. This UV light must provoke the cross link reaction into the gelatin previously sensitized with potassium bichromate (K2Cr2O7). This reaction is explained by several and sometimes slightly different theories. Luis Hernández (2), explains that the UV light …
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Carles Mitjà - ASIS/FRPS 