Is my Microphen formula correct?

Film Photography & Darkroom discussion

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Keith Tapscott.
Posts: 521
Joined: Tue Jan 17, 2006 8:58 am
Location: Plymouth, England.

Re: Is my Microphen formula correct?

Post by Keith Tapscott. » Mon Aug 06, 2018 8:31 am

The formula I have seen which seems most authentic was posted by pentaxpete. He said he got it from an Ilford employee just as they closed their plant in Brentwood IIR correctly. Hopefully he will reply here soon.

Sodium Tripolyphosphate 3.4g
Sodium sulphite 100g
Sodium metabisulphite 0.65g
Hydroquinone 5g
Borax 6.8g
Boric acid 2.8g
Potassium bromide 1g
Phenidone 0.2g
Water to make 1 litre of stock.


Ornello
Posts: 867
Joined: Thu Jan 19, 2006 9:49 am

Re: Is my Microphen formula correct?

Post by Ornello » Mon Aug 06, 2018 11:12 pm

Keith Tapscott. wrote:
Mon Aug 06, 2018 8:31 am
The formula I have seen which seems most authentic was posted by pentaxpete. He said he got it from an Ilford employee just as they closed their plant in Brentwood IIR correctly. Hopefully he will reply here soon.

Sodium Tripolyphosphate 3.4g
Sodium sulphite 100g
Sodium metabisulphite 0.65g
Hydroquinone 5g
Borax 6.8g
Boric acid 2.8g
Potassium bromide 1g
Phenidone 0.2g
Water to make 1 litre of stock.

ID-68:

Sodium Sulphite (anh) 85 g
Hydroquinone 5 g
Borax 7 g
Boric Acid 2 g
Poassium Bromide 1 g
Phenidone 0.13 g
Water to 1 litre

See how similar they are?

Keith Tapscott.
Posts: 521
Joined: Tue Jan 17, 2006 8:58 am
Location: Plymouth, England.

Re: Is my Microphen formula correct?

Post by Keith Tapscott. » Tue Aug 07, 2018 7:04 am

Ornello wrote:
Mon Aug 06, 2018 11:12 pm
Keith Tapscott. wrote:
Mon Aug 06, 2018 8:31 am
The formula I have seen which seems most authentic was posted by pentaxpete. He said he got it from an Ilford employee just as they closed their plant in Brentwood IIR correctly. Hopefully he will reply here soon.

Sodium Tripolyphosphate 3.4g
Sodium sulphite 100g
Sodium metabisulphite 0.65g
Hydroquinone 5g
Borax 6.8g
Boric acid 2.8g
Potassium bromide 1g
Phenidone 0.2g
Water to make 1 litre of stock.

ID-68:

Sodium Sulphite (anh) 85 g
Hydroquinone 5 g
Borax 7 g
Boric Acid 2 g
Poassium Bromide 1 g
Phenidone 0.13 g
Water to 1 litre

See how similar they are?
Yes, very much so. I suspect it would be very difficult if not impossible to tell the results apart from these two formulas.

pentaxpete
Posts: 87
Joined: Thu Jan 12, 2006 7:19 am
Location: BRENTWOOD,Essex,(UK)

Re: Is my Microphen formula correct?

Post by pentaxpete » Fri Aug 10, 2018 1:28 pm

yrs -- that IS the Formula I was given many years ago together with the 'Perceptol' one -- I have used it but as i have NO Tripolyphosphate I use de-ionised water as used by Wife for her Steam Iron, not our 'Hard' tap water here in Essex. I use it diluted 1+1.
Got COMPUTERISED and 'slightly Digitised Pentax K10D' but FILM STILL RULES !

Yak_Forger
Posts: 3
Joined: Tue Mar 19, 2019 2:05 am

Re: Is my Microphen formula correct?

Post by Yak_Forger » Wed Mar 20, 2019 12:53 pm

I've used this formula and it has worked fine for me with various cameras and types of film, I've developed parts of the same film with commercial microphen and homebrewed one and have obtained similar results.

Thanks for the recipes! I don't always find microphen for sale locally and have to order it online, but at least, now, I know I can do it with what I find in hardware shops.

pirateoversixty
Posts: 213
Joined: Sun Jun 18, 2006 1:21 pm
Location: Peoria, Illinois

Re: Is my Microphen formula correct?

Post by pirateoversixty » Thu Mar 21, 2019 10:23 pm

not that it is relevant at this point, but I went back through my collection of formulas, and I found a page that I had torn out of Peterson's Photographic, Feb. 1976, "Technical Index Sheet," by Perry C. Yob. He gives what he calls a substitute formula for Microphen, and also a replenisher. His formula matches Kenny's almost to a "T". He also states that distilled or deionized water should be used in mixing. He doesn't indicate where he got the formula, but that it is proprietary to Ilford. It is also noted that the 100g of sodium sulfite is for dessicated powder.
Jim

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