Topic: Help - is there a chemist in the house???

[LT]

I've just mixed up some Beutlers 105 as per the Darkroom Cookbook formula, and given it a try.

I've over developed slighlty, no big problem, but I've also got excessive fog (it's 120 film but looks like 35mm with the antihalation layer at double strength). Being a bit dim, I'm not too sure of the cause, I think it is because the sodium carbonate solution (B) must be too strong ... but I definately followed the formula:

Solution A - metol 10 grams, Sodium Sulphite 50 grams (to make 1 litre)

Solution B - sodium carbonate, anhydrous 50 grams (to make 1 litre)

and i used it at 20 degrees, 1:1:8

has anyone else had this trouble? Is it worth me trying 1:0.5:8 ... I know, without seeing it, it's hard to say, but what kind of over use of the sodium carbonate would cause so much fog? , I dont really want to waste a virtually whole litre of the B bath if I can get away with it. Is there any other reason for the fog (it's definitely not light fog)?

Perhaps I should I dump it and mix up some d76H instead

[LT]

I guess not then!

for anyone who is interested, I'm going to add some Potasium Bromide to combat the fog.  I'll be doing a write up on my blog (much neglected for now, but it will re-ignite into a bonfire of activity soon, honest).  I'm testing out some other homebrew developers too, so I'll write about those.  These are really simple 2 or three ingredient formulas so if I can get them to work, it's going to be cheap, cheap, cheap!

[al]

These are really simple 2 or three ingredient formulas so if I can get them to work, it's going to be cheap, cheap, cheap!

Ah, music to my ears! 

[aboot]

that's great!  i'm actually looking into developers myself right now and the cheaper they are the better... when you consider all of the chemicals i need for making kallitypes.   

i love mixing chemicals... it makes me feel like a mad scientist (i know, i'm a nerd)

[Francois]

Would be great if they also happenned to be formulas that can be put together from chemicals found in the grocery store - pharmacy - hardware store.

Bulk photochemicals are so hard to find around here.

I do collect formulas and put them in a big book. I call it saving a piece of photographic history.

Now for something slightly off topic; does anyone know the US patent office number for HC-110?

[LT]

Now for something slightly off topic; does anyone know the US patent office number for HC-110?

try apug.org .... bound to be lots of people over there who will know this kind of minutiae