Modification of SM-6 developer

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Sergey Vorobyov

Modification of SM-6 developer

Post by Sergey Vorobyov »

The pair: SM-6 developer and PBU-amidol bleach is good for making transparent holograms (for photoplates PFG-01 or VRP, for example).
But SM-6 have oxidize very quickly and it need change developer.
I want propose add small quantity of sodium sulfite to developer. Small quantity of sulfite don't change work of geveloper, but reduce oxygenation of components of developer.
I reduce quantity of sodium phosphate too and received good result.Standart formula of SM-6:
NaOH - 12 g
Phenidone - 6 g
Ascorbic acid - 18 g
Sodium phosphate dibasic
* 12H2O - 71,6 g
Water - before 1lNew formula of SM-6:
Sodium sulfite (anhydrous) - 10 g
NaOH - 12 g
Phenidone - 6 g
Ascorbic acid - 18 g
Sodium phosphate dibasic
* 12H2O - 40 g
Water - before 1l.Such developer don't oxidize long time.
Martin

Modification of SM-6 developer

Post by Martin »

Another way to get around with the problem of shelflife would be to make a devided developer, e.g.:A
phenidone......................................6 g
ascorbic acid...............................18 g
water........................................500mlB
NaOH.........................................12 g
Sodium phosphate dibasic............40 g
water..........................................500mlWorking solution: 1 part A + 1 part B.Incidentally, for non-pulsed laser exposure the amount of phenidone looks grossly exaggerated.
Sergey Vorobyov

Modification of SM-6 developer

Post by Sergey Vorobyov »

Of course, the developer have big stable BEFORE develop, when oxidation of developer is absent.
I mean - the keeping developer AFTER develop, when oxidation is appear.
I search new formula for pulse holograms (by Nd laser).
Martin

Modification of SM-6 developer

Post by Martin »

"I search new formula for pulse holograms (by Nd laser)."I see. I assume you already tried this one:ascorbic acid...................10g
hydroquinone.....................8g
phenidone..........................2g
sodium sulfite...................30g
sodium carbonate..............60g
dist. water...........................1L
Sergey Vorobyov

Modification of SM-6 developer

Post by Sergey Vorobyov »

Interesting formula. I shell test it obligated at next week.
Sergey Vorobyov

Modification of SM-6 developer

Post by Sergey Vorobyov »

I had tested your formula (the message at 18 September, 2003) many time ago, but some problems have prevented me to write about it earlier. Is actually – this developer is good! I record three test pulse holograms and develop one in SM-6 (modify, time – 5 min) and other two – in new developer (time –1 and 2 min). The brightness and noise is equal for SM-6 for time of develop 2 min. Need more accurate analysis of this developer.
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