Quote Originally Posted by dwross View Post
The trick of testing speed with the dark slide (just as you would test paper under an enlarger in the darkroom) is all you really need, and you shouldn't have to do it more than a couple of times in order to calibrate your recipe. Because the plates can be developed by inspection, you've got all the bases covered. When in doubt, bracket. It's always good insurance with handmade materials. 2 cents, d
this is what i do ..
i wish i could say i've used a densitometer or step wedges &c ...
i just make a test strip with a camera note the light conditions and take it from there.
i sometimes use a 35mm camera instead of a big 4x5 for my test strips, it works great !

denise, your 2c, is more like $2