Instant Mytol Recipe

[aconbere]

This sounds dumb, but I’ve been struggling to find an authoritative recipe for instant mytol online.

There’s this post from Jordan here: https://www.photrio.com/forum/threads/instant-mytol.23969/ But for me the quoted source is cut off and the recipe is obscured.

Hoping on of y’all can help me out

 

[retina_restoration]

This is the recipe I use:

Start with 750 ml water
60 g sodium sulfite
4 g sodium metaborate
13 g sodium ascorbate
0.15 g phenidone
3 g sodium metabisulfite
Water to 1000 ml

 

[aconbere]

This is the recipe I use:

Start with 750 ml water
60 g sodium sulfite
4 g sodium metaborate
13 g sodium ascorbate
0.15 g phenidone
3 g sodium metabisulfite
Water to 1000 ml

I’m confused so bear with me. But this looks like regular Mytol to me. My understanding was that what made instant mytol instant was the replacement sodium merabisulfite with potasium bromide, and sodium ascorbate with ascetic acid.

But again… so confused 🫣

 

[bluechromis]

Jordan also formulated a long-lasting non-aqueous part A version of Instant Mytol:

Start with 13.4 ml of hot triethanolamine
25 ml hot propylene glycol
11.5 g ascorbic acid
0.15 phenidone

Stir until all solids have dissolved. (It may require 1-2 ml. of water)
Dilute with hot propylene glycol to a final volume of 50 ml.
The stock solution should have a good shelf life if kept in airtight containers.

Working solution:
For use, dilute 1+19 with water containing 60 g/L of sodium sulfate. The resulting solution matches the activity of stock Xtol. To create something like Xtol 1+!, dilute 1+39 with water containing 30 g/L of sodium sulfate.

 

[Raghu Kuvempunagar]

This sounds dumb, but I’ve been struggling to find an authoritative recipe for instant mytol online.

There’s this post from Jordan here: https://www.photrio.com/forum/threads/instant-mytol.23969/ But for me the quoted source is cut off and the recipe is obscured.

Hoping on of y’all can help me out

Photosensitive

Black-and-white photography formulas, tips and tricks, and curiosities

photosensitive.ca

 

[aconbere]

Photosensitive

Black-and-white photography formulas, tips and tricks, and curiosities

photosensitive.ca

View attachment 403497

Imagine me slapping my forehead. I gave up when the original links were dead but didn’t think to try from the correct domain.

Thanks!

 

[koraks]

Borax	1.4​
Sodium sulfite	60​
Ascorbic acid	11.5​
Sodium carbonate monohydrate	5.64​
Phenidone	0.15​

I've always used this. I think I started with a mytol recipe I found somewhere, then replaced ascorbate with ascorbic acid and added carbonate to make up for that difference. I can't find the original source anymore. My notes say that this should be adjusted to pH8.20, which it may or may not hit right away when mixing. I admit that I usually don't do that and just use it as is.

ascetic acid

This must be an acid that lives in a recycled cardboard box instead of a luxury plastic tub, let alone a glass jar!
Sorry about the joke.

 

[Don_ih]

I use the recipe @koraks provided - which makes sense, I got it from him. Works very well. What I do is a direct mix of either 250 or 500 ml of 1:1 diluted mytol, calculated from that recipe, and I've never checked the Ph. Requires a good scale. I keep a solution of phenidone in glycol.

 

[koraks]

I use the recipe @koraks provided - which makes sense, I got it from him. Works very well. What I do is a direct mix of either 250 or 500 ml of 1:1 diluted mytol, calculated from that recipe, and I've never checked the Ph. Requires a good scale. I keep a solution of phenidone in glycol.

Yup, same here; I use it either 1:0 or 1:1 and mix it directly into the 'dilution' required. I keep a bottle of 1% phenidone in glycol at hand for easy measurement.

 

[retina_restoration]

I’m confused so bear with me. But this looks like regular Mytol to me. My understanding was that what made instant mytol instant was the replacement sodium merabisulfite with potasium bromide, and sodium ascorbate with ascetic acid.

But again… so confused 🫣

Sorry, I quoted the regular Mytol recipe, which is not what you wanted. My mistake.

The main reason I have avoided using “instant” Mytol is because there are multiple slightly different recipes for it on the internet: it seems few agree on the ingredients and amounts. Since I already have the metabisulfite (and ascorbate) in my arsenal, I stick with regular Mytol.

I keep a bottle of 1% phenidone in glycol at hand for easy measurement.

I assume you’re talking about propylene glycol, yes?

 

[Andrew O'Neill]

This is the Instant Mytol recipe that I have copied and pasted in a document from a few years ago. I've yet to try it, but will be soon, as my stock of XTol is down to one, 5L package. Once I'm out, then I'll start playing around with regular and instant Mytol...
@koraks how much of the phenidone/glycol solution to you add? Is it added to the stock, or working solution? Thanks!


Stock solution in water:
Start with 750 ml distilled water
60 g sodium sulfite (anhydrous)
11.5 g ascorbic acid
0.15 g phenidone (pre-dissolved in alcohol to aid dissolution)
13.4 ml triethanolamine or 7 g sodium metaborate
Water to 1 L
Working solution: Use as you would use XTOL (diluted 1+1, usually).

OR:

Stock solution in propylene glycol / triethanolamine:
Start with 13.4 ml hot triethanolamine
25 ml hot propylene glycol
11.5 g ascorbic acid
0.15 g phenidone
Dilute with hot propylene glycol to a final volume of 50 ml.

Working solution: The stock solution should keep indefinitely. For use, dilute 1+19 with water containing 60 g/L sodium sulfite — the resulting solution matches the activity of stock XTOL. To create something like XTOL 1+1, dilute 1+39 with water containing 30 g/L sodium sulfite.

 

[aconbere]

This must be an acid that lives in a recycled cardboard box instead of a luxury plastic tub, let alone a glass jar!
Sorry about the joke.

 

[aconbere]

Sorry, I quoted the regular Mytol recipe, which is not what you wanted. My mistake.

No worries! Appreciate the help regardless.

 

[koraks]

@koraks how much of the phenidone/glycol solution to you add? Is it added to the stock, or working solution? Thanks!

I always mix this recipe working strength, ready to go right before I use it one shot. I use a 1% phenidone solution, so if I'm mixing e.g. 500ml and my recipe calls for 0.075g phenidone, I use 7.5ml of 1% phenidone solution. I generally use pipettes to measure it; the ones I use are 3ml, so I'd probably do 3x2.5ml in that case.
I also have a 5% phenidone solution at hand for recipes that require more of it (e.g. print developer which I do mix as a concentrated stock). So I could in this case also opt for the 5% bottle and use 1.5ml of that. Really depends on whichever drops into my hand first, I guess.

I've never tried the concentrate that you posted, but that's an interesting idea. Does it keep well?

 

[aconbere]

I put in an order for so many chemicals. Will report back