D76ad formula?

Keith Tapscott. · Nov 4, 2023

Does anyone know the formula for D76ad as designed by Ryuji Suzuki?

I have searched online, but no luck.

Thanks in advance.

koraks · Nov 4, 2023

I'm not familiar with the "D76ad" developer and I wonder if it might have been synonymous with something like DS-8 or DS-10? Anyway, try here, on Suzuki's page on D76 which is fortunately still stored in the Internet Archive: https://web.archive.org/web/20100706215623/http://silvergrain.org/Photo-Tech/d-76.html

And perhaps also relevant to include here is a link to @Ian Grant's excellent page: http://www.lostlabours.co.uk/photography/formulae/developers/devD76_variants.htm

Don_ih · Nov 4, 2023

DS-1 is

Sodium sulphite (pinch)
Metol 2.0g
Ascorbic acid 5.0g
Borax 12.0g
Sodium sulphite 100g
--1 litre

That's a D76 with ascorbic acid. Is that what you're looking for?

Tom Kershaw · Nov 4, 2023

Keith Tapscott. said:
Does anyone know the formula for D76ad as designed by Ryuji Suzuki?

Not sure about D76ad, but I use Ryuji Suzuki's DS-10 (faster films, e.g TMY-2, HP5 Plus), and DS-12 (slow to medium speed) with good results.

pentaxuser · Nov 4, 2023

Don_ih said:
DS-1 is

Sodium sulphite (pinch)
Metol 2.0g
Ascorbic acid 5.0g
Borax 12.0g
Sodium sulphite 100g
--1 litre

That's a D76 with ascorbic acid. Is that what you're looking for?

Don, what changes to D76 does the addition of ascorbic acid result in?

Thanks

pentaxuser

chuckroast · Nov 4, 2023

Keith Tapscott. said:
Does anyone know the formula for D76ad as designed by Ryuji Suzuki?

I have searched online, but no luck.

Thanks in advance.

You might also poke through the archives of the original pure-silver list. Ryuji used to post there:

https://photoarchive.tundraware.com/Original-Pure-Silver-Archives/

Keith Tapscott. · Nov 4, 2023

Don_ih said:
DS-1 is

Sodium sulphite (pinch)
Metol 2.0g
Ascorbic acid 5.0g
Borax 12.0g
Sodium sulphite 100g
--1 litre

That's a D76 with ascorbic acid. Is that what you're looking for?

I saw a thread about ascorbic acid developers some time ago which mentioned D76ad, but it didn't give the formula. It may have been over on photo.net but I can't remember.

Ryuji was replying to a question about a D23 type developer with ascorbic acid added to it. He mentioned that D76ad gave improved results over the standard D76 and D76H (H76) formula. It was an old thread going back many years.

The formula you gave for DS-1 is one I hadn't seen before and definitely of interest to me.
Thank you for posting this formula and thanks to everyone who replied.

Don_ih · Nov 5, 2023

Keith Tapscott. said:
The formula you gave for DS-1 is one I hadn't seen before

I found it in a web search, posted on FADU. I can't 100% verify that it's the Suzuki formula for that reason. But looking at it, it fits the bill of both D76 with ascorbic acid instead of hydroquinone and a D23 developer with added ascorbic acid (sort of).

@pentaxuser -- this DS-1 formula replaces hydroquinone in D76 with ascorbic acid + additional borax to essentially make a completely different developer that can be used in a way similar to D76.

pentaxuser · Nov 5, 2023

Don_ih said:
@pentaxuser -- this DS-1 formula replaces hydroquinone in D76 with ascorbic acid + additional borax to essentially make a completely different developer that can be used in a way similar to D76.

Thanks Don

pentaxuser

Trask · Nov 5, 2023

FWIW, I'm attaching a 2001 back-and-forth online exchange I seem to have copied some time ago, in which several persons including Mr. Suzuki discuss developers, with Ryuki mentioning D76ad. Please excuse me if this is repetitive.

Gainer's Vit-C developer

halfaman · Nov 6, 2023

In the same web there is D-76Ad formula from Ryuki himself (third message). It is more or less an ascorbic acid version of D-76d and equal to DS-1.

D-76Ad -- ascorbic acid version of buffered D-76

Keith Tapscott. · Nov 6, 2023

halfaman said:
In the same web there is D-76Ad formula from Ryuki himself (third message). It is more or less an ascorbic acid version of D-76d and equal to DS-1.

D-76Ad -- ascorbic acid version of buffered D-76

I read that post, but I didn't see a formula for D76ad, only the formula for DS-1.

I thought D76Ad may have been a buffered borax version similar to D76ad.

Thank you for replying though. If D76AD is different from DS-1 and you find the formula for it, please post it here.

Keith Tapscott. · Nov 6, 2023

That should have read as D76d.

D76ad formula?

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