Page **1** of **1**

### Re: Is my Microphen formula correct?

Posted: **Mon Jun 03, 2013 2:37 pm**

by **Ornello**

### Re: Is my Microphen formula correct?

Posted: **Tue Jun 04, 2013 2:17 am**

by **Keith Tapscott.**

The formula for Microphen has never been in the public domain and neither has it's replenisher. Glycin is not mentioned in the MSDS.

Ilfotec DDX and the dip & dunk developer Ilfotec DD take Microphen, Autophen and the published ID-68 relative to it's next logical stage as liquid concentrates. Microphen will most likely remain a trade secret.

As Ornello mentioned, try ID-68.

### Re: Is my Microphen formula correct?

Posted: **Tue Jun 04, 2013 2:28 am**

by **Keith Tapscott.**

By the way, Phenidone is used in Micro-PHEN (hence it's name )and requires hydroquinone as a super-additive agent. Phenidone on it's own has poor keeping and produces very low contrast without it.

### Re: Is my Microphen formula correct?

Posted: **Tue Jun 04, 2013 9:15 am**

by **Ornello**

Microphen is most likely a refined version of ID-68, perhaps with additives for buffering and a slightly different proportion of phenidone and hydroquinone.

### Re: Is my Microphen formula correct?

Posted: **Sat Aug 03, 2013 8:50 pm**

by **KennyE**

Two of my earlier post were deleted due to error. But I ask the question, "Is my Microphen Formula is correct. And the answer is no it was not.

Photographic Possibilities: The Expressive Use of Ideas, Materials and Processes: By Robert Hirsch, John Valentino, list on page 75 the Microphen formula. That same formula is also listed in "The Amateur Photographer's Handbook" 8th edition on page 375, by Aaron Sussman.

Water 750ml

Sodium Sulfite 100 grams

Hydroquinone 5 gram

Borax 3 gram

Boric Acid 3.5 gram

Phenidone 0.3 gram

Potassium Bromide 1 gram

Water to make 1 Liter

Thank You

KennyE

### Autophen

Posted: **Mon Aug 05, 2013 7:19 am**

by **IanG**

The Formula for Autophen an Ilford photo-finishing developer itself a variant of ID-11 is:

Sodium Sulphite 100 g

Hydroquinone 5 g

Borax 3 g

Boric Acid 3.5 g

Phenidone 0.2 g

Potassium Bromide 1 g

Water to 1 litre

This has been mistakenly listed as Microphen in many US publications.

Ian

### Re: Is my Microphen formula correct?

Posted: **Tue Aug 06, 2013 11:56 am**

by **KennyE**

Hello Ian, how are you today?

A few years back, Keith made the post sited below, on another thread dealing with this same subject. Do you happen to know what the formula listed below is? It is not like any Microphen formula that I have seen. It got my interest because Edward Lowe like to include T.S.P., in many of his formulas, like those in his famous 1939 book. Could this be one of his unknown formulas?

Hydroquinone with Metol and Phenidone.

Keith Tapscott. ยป Sun Jun 06, 2010 9:23 am

I saw this formula on a web site which is claimed to behave identically to Ilford Microphen, although I can not verify that. I did not see a formula for a replenisher though.

Pentax-Pete who post here sometimes might know.

Sodium Tripolyphosphate 3.4 gms

Sodium Sulphite anhyd 100.0gms

Sodium Metabisulphite 0.65 gm

Hydroquinone 5.0 gms

Phenidone 0.2 gm

Boric Acid 2.7 gms

Borax 6.8 gms

Potassium Bromide 1.0 gm

Water to make 1 Litre

Thank You

KennyE

### Re: Is my Microphen formula correct?

Posted: **Wed Aug 07, 2013 5:00 am**

by **IanG**

It's just one of Ilford's PQ variants of ID-11. It may well have been the formula for a powdered version of Autophen. It was quite common to use Metabisulphite as a preservative to prevent oxidisation of the developing agents (usually Part A) in the packaging, both Ilford & Kodak have done this with various powder developers.

Ian

### Re: Is my Microphen formula correct?

Posted: **Thu Aug 08, 2013 5:05 pm**

by **KennyE**

Thank You Ian, I will make a note of that information it in my research.

Thank You

KennyE