Cyanotype vs Daguerreotype
サイアノタイプ / ダゲレオタイプ
Both sit in Photographic Techniques, so the question is not what they belong to but how they behave. Both are read here as technique. They are reached for with some of the same intent, which is where they get confused.
Cyanotype
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Fixes the outline of a light-struck object directly into deep blue, making record and lyric the same image.
Daguerreotype
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The first practical photography, fixing an image directly onto a silvered plate. A one-of-a-kind picture reversed as in a mirror and housed in velvet like jewelry is where the experience of owning an image begins.
| Cyanotype | Daguerreotype | |
|---|---|---|
| Era | 1842– | 1839–1860s |
| Family | Photographic Techniques | Photographic Techniques |
| Kind | Technique | Technique |
| Cues | Prussian blue / White object traces / Contact shadows / Chemical unevenness | The mirrored silver plate / A unique reversed image / Jewel-like cased presentation / Painfully fine detail |
| Best used for | Directly recording plants, materials and objects · Adding the trace of handwork to drawings and archives | Portraits given as unique objects and keepsakes meant to exist as things · Exhibitions on photographic history that let visitors feel image ownership |
| Type | White or pale letters; add small classification labels | Inscribe the name small on the back or the rim, never the plate |
| Composition | Lead with the object's contour; keep generous blue around it | A bust centered and held still enough for a long exposure |
| Material | One deep blue and the paper's white; don't polish away the exposure marks | Mount so the mirrored plate reveals its image at an angle |
| Caution | A blue filter is not the technique. Understand contact image, exposure and support. | Imitating only the look in software strips away how the plate behaves as an object flipping between positive and negative, leaving a pastiche of age. |