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1. Originally Posted by David William White
This is pretty amazing. I decided upon 1:50 just last month. First because the time for AristaEDU-Ultra 100 is so short in 'B' that it's not recommended (and kinda short for PanF+, too) Secondly to make the math simpler for 1/2 litre & 1 litre, and lastly for economy.

So I'm having good results with:

AristaEDU-Ultra 100, rated at 100: 20C, 6.5 minutes [half a dozen rolls]
Ilford PanF+, rated at 50: 20C, 5.5 minutes [about a dozen rolls]

David.
Hi David,

I added your info to the page, and gave you the credit. Hope that's ok.

2. Super. Appreciate the effort, and prefer the metric-friendly 1:50, especially since 1:31 is a bit too active for some films. And I DO remember the nonsense of going through the two recommended dilutions (with a slide rule in hand) to arrive at my 500ml of working solution.

I'll check back on your page to see if anyone recommends alternate times for PanF+ at 1:50.

D.

3. Originally Posted by MattKing
Which technically is 1:49, not 1:50, but the difference surely wouldn't matter.

Matt
the ratio concentrate to dilutant is 1:49, which is interesting to some degree.
however the ratio of concentrate to final solution is 1:50, which is what we

4. Good idea. Better to make it simple when you can.
I love the video...
G.

5. Originally Posted by Anscojohn
In the interest of KISS, when I took 1 oz. of HC110 goop, and added it to 31 oz. of water, I got one quart of useable film developer.

So, if I choose to go 1:50, and have a tank that holds 500 ml of solution, and I wish to fill the tank, how much goop do I use and how much water?

John (perplexed) in Mount Vernon, Virginia USA
Just to annoy Jason cos I know he loves it when I do, it's even easier to say:

1+49 is the ratio. Why? Because 1+49 = 50 and if you have a 500ml tank then the amount of goop you use is 500/50 = 10. 49 lots of 10 is 490 and 490 + 10 is 500.
Dividing by 50 is so much easier than dividing by 51

And I agree 1+49 is a good dilution because it gives times sufficient for use in inversion tanks.

And Jason, you may like to add to your page that in Europe some HC110 sold in sizes less than 1 litre are not the same strength as the 1 litre bottles and therefore require different dilutions from what is quoted on your page. Many have been caught out by this little ploy from kodak.

The 500ml bottle dilutes 1+9 for Dilution B whereas the 1 litre bottle dilutes 1+31 for dilution B.

Now that's what I call confusing

6. Originally Posted by rob champagne
Just to annoy Jason cos I know he loves it when I do, it's even easier to say:

1+49 is the ratio. Why? Because 1+49 = 50 and if you have a 500ml tank then the amount of goop you use is 500/50 = 10. 49 lots of 10 is 490 and 490 + 10 is 500.
Dividing by 50 is so much easier than dividing by 51

And I agree 1+49 is a good dilution because it gives times sufficient for use in inversion tanks.

And Jason, you may like to add to your page that in Europe some HC110 sold in sizes less than 1 litre are not the same strength as the 1 litre bottles and therefore require different dilutions from what is quoted on your page. Many have been caught out by this little ploy from kodak.

The 500ml bottle dilutes 1+9 for Dilution B whereas the 1 litre bottle dilutes 1+31 for dilution B.

Now that's what I call confusing
LOL

No annoyance here, I'm still trying to decide exactly what 1:50 means on my planet...

Oh, and there is a little disclaimer that the times are for the US version.

7. Originally Posted by JBrunner
LOL
Oh, and there is a little disclaimer that the times are for the US version.
Well being uncivilised I didn't read it all...

8. Originally Posted by rob champagne
Well being uncivilised I didn't read it all...
I thought you guys had gone metric.

9. Originally Posted by JBrunner
I thought you guys had gone metric.
well that depends. For example, would I demand a pound of flesh or 453.592 grams of flesh?

10. Another thanks from the metric world

Your acros100 time is about the same as what I had come up with for a 1:59/1:60 dilution iso80 combo

Love your work, keep it up

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