February 2009

Monthly Archive

Valosta

Posted by on 14 Feb 2009 | Tagged as: Uncategorized

VALOSTA – erikoistumisopintojen lopputyönäyttely Satakunnan ammattikorkeakoulun Kuvataiteen galleriassa, Paasikivenkatu 24, Kankaanpää, 9.2. – 3.3.2009, avoinna arkisin klo 9 – 16. Avajaiset 6.2. klo 18. Näyttelyn lehdistökuvia ladattavissa täältä.

VALOSTA – an exhibition by students of specialization studies, February 9 to March 3, Satakunta University of Applied Sciences, Gallery of Fine Art Kankaanpää, Finland.
(The page in Finnish only)

The Exhibition Opening

Posted by on 14 Feb 2009 | Tagged as: Uncategorized

The students of Fine Art specialization studies were showing their work at the “VALOSTA” exhibition. Here are some pictures of their exhibition opening.

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Hannele Heino‘s cyanotypes on paper clay.

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Liquid silver emulsion on sheet metal and gold leaf by Matti Kervinen.

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A gumoil print by Erja Laakkonen.

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Anne Salmela‘s gum bichromate prints.

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Bromoil prints by Päivi Setälä.

Tri-Color Gum Preparation

Posted by on 02 Feb 2009 | Tagged as: Gum Bichromate

Some testing with pigment saturation and tone range for tri-color gum printing. The aim is to print in “full color”* with only three separation negatives, using CMY (cyan-magenta-yellow) pigments, without the K (black) component normally used in commercial color separations. I am trying to create black by mixing from the three color layers. I will use cyanotype as the bottom layer, diluted with water to balance it better with the other colors.

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Exposure tests on Cyan (traditional cyanotype diluted with 4 parts of water), Magenta (Maimeri Magenta), and Yellow (Maimeri Cadmium Yellow).

Once the pigments and their strength are chosen, and a working correction curve created for each separated negative (e.g. by ChartThrob script), they can be tested by printing all CMY colors on top of each other. If the pigments were chosen succesfully and the negatives curved properly, the result should be, more or less, a gray balanced image.

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Cyan (cyanotype, top left), Cyan+Yellow (top right), and Cyan+Yellow+Magenta (left), each layer with its correction curve, respectively.

*A gum printer’s “full color” doesn’t necessarily look like properly balanced color photograph (if it did, why bother gum printing at all), rather it is his/her interpretation of subject colors, and can vary quite a lot, depending on pigments chosen. That said, also naturally balanced, very realistic “photographic” colors are possible to achieve.