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Xtol 1:1

ryanmills

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I'm having a moment, in my head I thought 1:1 was stock, and that 1+1 would be 50% xtol, 50% water. But does 1+1 and 1:1 mean the same thing because your adding the same amount?
 

Dr Croubie

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1:1 is the same as 1+1. 100ml dev plus 100ml water = 200ml solution.

1:0 is 1+0 is stock. 100ml dev = 100ml dev.

Whenever I write something I write it like 1+0 or 1+1 because then there's no cause for confusion like some people get with 1:0 or 1:1 (but i don't get confused because my highschool chemistry teacher beat it into us, the correct way to use ratios)
 
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ryanmills

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thanks i almost mixed it stock till i saw a note on the package about diluting it 1:1... lol
 

Richard Man

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Generally speaking, the weaker concentrations (1+2 and even 1+3) allow the negs to be souped longer, and thus the highlight possibly more developed. Just make sure you have enough of the stock per roll/sheet of film. i.e. at least 80ml-100ml per 35mm roll or equivalent.

My first mistake in using Xtol was to store the working solution (1+2) and THAT didn't end up well...
 

psuttner

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If I were to dilute stock dev to 1:1 would it double the development time? Or what ball park % increase would be appropriate?
 

Dr Croubie

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psuttner said:
If I were to dilute stock dev to 1:1 would it double the development time? Or what ball park % increase would be appropriate?
Click to expand...

Depends on the film, you should always read the chart
eg FP4+ at ei125 goes from 8 mins at 1+0 to 10 mins at 1+1, that's +25%.
PanF50+ at ei50 goes from 7 to 7&3/4 mins, that's only +10.7%
 

psuttner

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Typical for me to ask the question first and then read the instructions. Thanks for the response!
 

Andrew O'Neill

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Generally speaking, the weaker concentrations (1+2 and even 1+3) allow the negs to be souped longer, and thus the highlight possibly more developed.
Click to expand...

didgiman, I think you meant the shadows are possibly more developed. Xtol is wonderful out to 1+3.
 

Sirius Glass

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Alan Klein said:
I like mine straight up. Stirred not shaken.

Oh, sorry. Wrong forum.
Click to expand...

But still you have the right idea. Only use Gin, vodka in a Martini was one of Ian Flemming's truly stupid mistakes that he perpetuated in the James Bond books. It shows that Ian Flemming had a complete lack of taste.
 

Richard Jepsen

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XTOL diluted greater than 1:1 compensates and reduces highlights while giving shadows a boost. 1:3 generally is most useful in contrasty light.
 

psuttner

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Tried 1:1 dilution and 20% increase in time from Ilford chart. The highlights whew very much in control and plenty of shadow detail. Gin is best with Kool-Aid.
 

Gerald C Koch

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This is why several people including myself have been campaigning to banish the colon notation in favor of the plus character. Use of the colon causes so much disagreement and confusion. Does 1:2 mean equal parts of developer and water or does it mean 2 parts of water? The notation 1+1 eliminates all doubt.
 

brian steinberger

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1:2 and 1+2 are the same thing. Just as 1:1 and 1+1 are the same. They are interchangeable. It's just how you choose to notate. The first is always parts developer and the second is parts water.

I've never been confused by the use of : vs. +.
 

Gerald C Koch

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brian steinberger said:
1:2 and 1+2 are the same thing. Just as 1:1 and 1+1 are the same. They are interchangeable. It's just how you choose to notate. The first is always parts developer and the second is parts water.

I've never been confused by the use of : vs. +.
Click to expand...

It does not mean the same to all people. The problem with the colon notation such as 1:2 is, and this is a fairly common misunderstanding, does the 2 in the example stand for the total volume of developer or the amount of water used. There are two ways of defining the proportion and this is what leads to confusion. The plus notation removes any confusion.

A few years ago a website discussing the Beutler formula gave the ratio 1:1:10 instead of the usual 1:1:8. The 10 referring to the total volume of developer. While it was clear to the writer many people mixed up developer that was more dilute than usual and then were disappointed with the results.
 
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Sirius Glass

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My potions of choice ==> 1:0 XTOL and replenished XTOL
 
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