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Thanks Patrick. I did a little digging, and found this calculator for converting moles to grames for Citric Acid (the dominant acid in black currant). http://www.convertunits.com/from/moles+Citric+Acid/to/grams (I used this to doubled check converting mmol to moles -...

Thanks Bob. I feel pretty confident now in the level of dilution, because I've more or less matched the concentration of the Vintner's Harvest fruit base and the numbers are all relatively close between the two at this level (brix and acid). Although it was a pain making these adjustments...

Well, I think I've resolved this question and it boils down to some basic math regarding the dilution of the concentrate. Based on the Vintner's Harvest juice that I've tested and the resulting excellent tasting wine, the brix I need to be starting with is only 3 or 3.5. This is because black...

Bernard - the dominant acid in black currant is Citric Acid. I am not using berries, but a black currant juice concentrate. As I understand it, the TA test using Sodium Hydroxide measures total acids, not just tartaric. Is that not correct? I don't have any testing equipment to just measure...

These are the details from the vendor. Product of Poland 65 brix 14.24% approx. acid I measured the concentrate, and it was about 14% before dilution so I think the testing and their number is pretty close. I am using the standard TA test with Sodium Hydroxide 0.1N and a pH meter to estimate...

I've been making some Black Currant wine using Vintner's Harvest "Fruit Base" and its been quite excellent. So, I decided to step it up and acquire 5 gallons of Black Currant concentrate and make an approx 35 gallon batch of black currant wine. My question, and it's rather urgent, has to do with...

Regarding the impact of metabisulfite during primary fermenting, I had a situation recently where adding it during the first racking stopped my ferment. Normally I measure the SG before racking and depending on plans will use sulfite on first and last rackings. In this case I was lazy and didn't...