From: Sandy King (sanking@clemson.edu)
Date: 09/15/01-09:14:38 PM Z
Lukas,
Yes, I am sure about the recipe for both the gold and platinum toner.
To tone a 12X20 or 16X20 print with either of these toners you need
only about 0.5ml of either a 1% solution of Gold Chloride or
Potassium Chloroplatinite #3. In fact, you may be able to get away
with even less of the platinum solution. I just toned a 12X20 Van
Dycke print with the Potassium Chloroplatinite solution and used only
.025ml in 200ml of toner (with 1g of citric acid). It toned well.
Potassium Chloroplatinite #3 is one of the standard pt/pd chemicals
and is sold by Bostick and Sullivan.
The gold toner gives a warm maroon/black tone, the platinum toner an
almost neutral black, with just a bit toward brown.
The key to maximum capacity of this toner is to mix it in small
quantities, just enough to tone a print or two, and then discard.
This is real easy to do as the citric acid and gold or platinum go
into solution almost immediately so it is quite feasible to mix it up.
Sandy
>Sandy,
>
>My normal toner for salt prints is the common borax toner which works quite
>well. I tried selenium for another image colour.
>I want to try the toner recipy you give, but are you sure about the low
>content of gold? Reilly gives this recipy for platinum, but says: 50 ml 1%
>potassium chloroplatinate, 4g citric acid, 750 ml water. I am not familiar
>with the % of the #3 solution.
>
>What image colours do you get with gold?
>
>Lukas
>
>>In my opinion the best way to get around the problem you are having
>>with salted paper and selenium toners is to switch toners. Gold and
>>platinum work much better and can be used in very dilute solutions
>>that makes their use feasible from an economic point of view.
>>
>>I have had good success with the following gold and platinum toner:
>>
>> water 900ml
>> citric acid 5g
> > Potassium Chloroplatinite (#3 solution) 5ml
>> (or Gold Chloride 1%) 5ml
>> Water to 1000ml
>>
>>In my work a liter of toner has the capacity of about (10) 12X20
>>prints, that is, about 0.5 ml of either the gold or platinum solution
>>are needed for each print). However, the mixed solution does go bad,
>>so if you are working with smaller prints I would recommend mixing
>>the toner in smaller batches of 100-200 ml. For greatest consistency
>>I mix the toner 200 ml at a time and use this for toning two 12X20
>>prints, then I discard.
>>
>>BTW, the above toners work nicely not only with salted paper but also
>>with kallitype (including Van Dycke), and POP.
>>
>>You can also split tone with these formulas, but if so make sure to
>>tone first with gold, wash, then follow with platinum. Tone before
>>fixing.
>>
>>Sandy King
>>
>>
>>--
>>
>>
--
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