Divided Developers for B&W paper

[Tom Hoskinson]

Thanks very much guys for setting my straight. I got the wrong impression from a previous Ansco130 thread. I deleted the erroneous recipe from my post... maybe y'all could do likewise from your quote of my post so no one gets confused in the future if they do a search and just get that post as a hit.

I've seen mention a couple of times in the forum of a table that gives kitchen/informal equivalents of formal measurements, like how many grams is a teaspoon, a tablespoon, etc. I think some posters have mentioned that they were able to get along without buying a balance by doing things this way.

Pointers to such a table? Comments on the method?

-KwM-

You are welcome!

Try this web based general purpose grams-to-teaspoons calculator. It should be close enough for most photo chemical recipes:

http://www.gourmetsleuth.com/gram_calc.htm

Where more accurate measurement is required you might consider one of the small battery powered electronic scales that are available for about $30.00 on eBay.

 

[David A. Goldfarb]

Jay,

Nope, I mean 10 ml of Edwal's liquid Orthazite, which is Benzotriazole, but I'm not sure in what percentage solution. I should have specified that.

Larry

I'm not sure where I know this from (maybe Anchell's _Darkroom Cookbook_), but I believe Liquid Orthazite is a 3% solution of benzotriazole with sodium sulfite added.

Anchell also has teaspoon conversions, and suggests that particularly with powdered chemicals that absorb water from the air, measurements by volume can be more accurate than by weight.

 

[Tom Hoskinson]

I'm not sure where I know this from (maybe Anchell's _Darkroom Cookbook_), but I believe Liquid Orthazite is a 3% solution of benzotriazole with sodium sulfite added.

Anchell also has teaspoon conversions, and suggests that particularly with powdered chemicals that absorb water from the air, measurements by volume can be more accurate than by weight.

A 3% solution of Benzotriazole is a very high concentration. It might be difficult to dissolve (and keep dissolved) in water at that concentration.

I use a .2% solution of Benzotriazole in water as a stock concentrate.

 

[David A. Goldfarb]

It is a high concentration, but I'm not sure if Liquid Orthazite entirely water based.

I keep a 1% concentration on hand, and lately a 0.1 % concentration.

 

[Maine-iac]

A 3% solution of Benzotriazole is a very high concentration. It might be difficult to dissolve (and keep dissolved) in water at that concentration.

I use a .2% solution of Benzotriazole in water as a stock concentrate.

I don't know what concentration liquid Orthazite really is, but I've never had any problems with it. 10 ml in all my developer formulas seems to work just fine.

Larry