Slightly puzzled at first by question, wondering why you would add food supplements to photographic chemicals. Are you trying to use Vitamin C (ascorbic acid) as an ingredient in a developer and only have multivitamin tablets? Food grade calcium slats are usually carbonates and so are are alkaline, not a problem with developers but would bubble (CO2) in acid fixer, vitamin D is a fatty acid based compound, so not easily dissolved or very reactive in dilute solutions. If this is in tablet form there will also be bulking agents, often sugars, inert materials and waxes used in coatings which would cloud or mark film or paper.
Originally Posted by razocaine_07
For ascorbate based developers (Caffenol) I use pure vitamin C from the Holland and Barrett Health shop so no problem with added materials. £6.69 for 170g or £18.99 for 567g -is faily pricey compared to bulk ascorbic acid but convenient.
Last edited by dmb; 03-02-2013 at 08:33 AM. Click to view previous post history.