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Response to Sprocket Flow Marks on Negative in Emofin?

from Samuel Tang (samueltang@austarmetro.com.au)
I imagine that you are confusing two separate issues here: sprocket rush and bromine streaks. The former is due to extra development during inversion agitation when the sprocket holes allow for an extra rush of developer over the negative surface, and it looks like extra density coming out of the sprocket holes across the negative width. The latter is due to the bromine produced during development sinking, and looks like lower densities streaking from high density areas.

I have used various two-bath developers including Heinrich Stoekler and Emofin, and discovered that the best way to banish both problems is to use rotary processing with a Jobo processor. The compensating effect is still present to a large degree, but then printable negatives are assured.

(posted 8401 days ago)

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