Typical starting point for an 8 tube exposure box gum print. Using a 10% Ammonium Dichromate solution mixed in equal parts to pigment the exposure through paper negative is 6.5 minutes. Exposure to a pictorico neg is 4 minutes.
Category: Prints
Let There Be Yellow
Checking two, actually three things in this, the editor, page load, and image… Also new way of developing this imagery. Old manor of image, but new way of doing…
Exposure Laws
The inverse square law, aka “butter gun,” can guide our darkroom exposure changes under an enlarger, but it fails with large or volumetric light sources used in alt photo processes.
The law stated for mnemonic ease:
An object twice as far from the light as another recieves one fourth the light.
Oddly, this principle of physics applies to more things than light, including sound, or in my fading memory, butter coating machines at the toast plant… or was that a Taoist plant?

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