First the answer to your question. The 60% must weight/volume. So, 600g of Amm.thio. for 1000cm3
final volume. Adding powder to a liquid increases the volume, less than one might anticipate, but 60%, is a lot. So start with less than the final volume (800cm3? 600?) dissolve the powder (probably need to heat) and adjust total volume.
Now what you did not ask.
1 - 60% amm. thio. is used as a fertilizer. Minimum order 1000 litre, but more commonly sold as a complete truckload. That is in France. Elsewhere might be different. Or you are lucky to live next to a farm that is willing to re-sell you a few litres.
2 - Making your own fixer is not economically viable (even if your time spent is "free") when comparing with "amateur" products (Ilford, Foma, Adox) and a clear loss comparing with fixer for C-41, which is just the same, but different market. The best deal I found:
CHAMPION - Fixateur C41-RA Mydoneg Universal pour faire 2x5L à 2x15L de Champion est vendu sur la boutique PH Distrib.com dans la catégorie Développeuse C41
www.phdistrib.com
From the recommended dilution and replenishent rates, I infer that for 25€ you have the equivalent of 4 litres of concentrated rapid fixer (Ilford, etc).
3 - As concerns the need for an alkaline fixer, see:
Mixed up some D-70 and developed a 2004 roll of Tri-X 120, shot in Grand Dad's old Target Six-20. I'll take a closer look at them in the morning. 🙂
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Hi all, So I realized that my concentrated Ilford rapid fixer got a milky white color when mixed with water (from a 5L bottle, half full) It has more than the stated 6 month by Ilford sheets. I just mixed a 1+9 dilution and run the "negative strip test" and the fixer cleared the strip in...
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