Parameters were similar to those above on this forum. pH around 3.7 and TA 6 or so. I noted that the longer skin contacts gave higher TA and pH consistent with tartrate extraction from the skins. Batches were roughly 65 L.
Data
1. 4 hr juice: 3.59/6 Added 81 g tartaric went to 3.50/8.1 Started with SVG SG 1.089
2. 8 hr juice: 3.68/5.7 Added 85 g tartaric went to 3.54/6.9. Started with Vin 13 Slow. SG 1.088
3. 24 hr juice 3.82/6.6 Added 63 g tartaric went to 3.68/7.5 Starting with CY3079. SG 1.085
All had pectic enzyme added at 0.5 to 0.7 g per gall.
Planning second runs to be prepared Monday. 7th