Quote Originally Posted by Photo Engineer View Post
Dwayne's probably bought prepared "kits" from Kodak. They would not have hand mixed IMHO.

MP labs typically hand mix.

Kodak supplied Dwaynes with all the chemicals in their crystalline form, they did not have to synthesise the end product of course, but they had to prepare all the mixtures to the right dilution etc.
Thats why a trained chemist was required to run the large scale K-14 machines, in addition to mixing them correctly, they needed to constantly monitor the chemicals and regularly replenish them.
As far as im aware with the K-labs, the chemicals were already mixed to the correct strength and sealed in bags flushed with nitrogen, so that the mixed chemicals did not oxidise.