Its common name is lye, just like you'd buy at the market. It is a powerful alkali, one of the most dangerous and difficult to use in photochemistry. Furthermore, it is very hygroscopic, meaning that it absorbs considerable water out of the air, making older volumes hard to accurately measure in the small amounts usually required. In relatively small amounts, it will accelerate the activity of most developing agents, reducing development times. Used in a concentration much more than in the video (1.0 gr/l), it will further increase contrast, but also rapidly build base fog density. In most films when compared to less active and more commonly used accelerators, it will increase grain coarseness, not to be confused with increased sharpness. Not clear why he's using it in the video, where sodium carbonate, or even borax, would be easier to use and measure in small increments.
Very interesting to us D-23 users. Thanks for your continued experimentation, Andy.
0:00 Intro
0:21 Scene Zone Placement
0:35 Exposure
1:10 Darkroom
5:20 Results
i love semi stand with 1g
I was surprised that you didn't have a lid on the tank. I've always inverted tanks during agitation. Is there a reason? Thanks for the video ❤
Yes, I've always preferred figure-eight pattern for agitation. I find that it is plenty enough.
What is the chemical action the sodium hydroxide have in developing?
Acts as an accelerator to activate the developing agent, metol, making it more active. It also is added to increase overall contrast with developers.
Its common name is lye, just like you'd buy at the market. It is a powerful alkali, one of the most dangerous and difficult to use in photochemistry. Furthermore, it is very hygroscopic, meaning that it absorbs considerable water out of the air, making older volumes hard to accurately measure in the small amounts usually required. In relatively small amounts, it will accelerate the activity of most developing agents, reducing development times. Used in a concentration much more than in the video (1.0 gr/l), it will further increase contrast, but also rapidly build base fog density. In most films when compared to less active and more commonly used accelerators, it will increase grain coarseness, not to be confused with increased sharpness. Not clear why he's using it in the video, where sodium carbonate, or even borax, would be easier to use and measure in small increments.
@@randallstewart1224 I was curious about it so I thought I'd give it a try.