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New HEAP alternative


fotohuis
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New from Klaus Wehner in Paderborn, Germany is the synthetic alternative for HEAP, former used in May & Baker Promicrol and Agfa Atomal. The new type developer ATM-W (Atomal from Wehner)  is already tested with some HD curves with some different films. I am getting the new formulae next week when the new HD-Polyethylene bottles are ready to ship. HEAP combines box speed with fine grain. These two developers were in the past very populair in 35mm photography.

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The N-(beta-hydroxyethyl)-o-aminophenol sulfate (HEAP) was carcinogenic so both May & Baker and Agfa Gevaert stopped producing their special developers in the 70's.

Till Kodak made Xtol in 1995, there was no real developer which could combine film speed and ultra fine grain.Further you could keep both developers on stock pretty long while Xtol with Ascorbic Acid (Vit. C) has a short life span.

 

Wehner made a synthetic alternative, not carcinogenic of course. In the last decades healthy photo chemicals are produced only.

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