They will be harder to peel if left over-night and they will darken unless they are kept in an ascorbic acid solution of some kind. But there is no safety issue per se although it will allow for some bacterial growth even when covered in the fridge.

As for the instructions you linked they are basically the same as the standard NCHFP and Ball instructions with optional apple juice or white grape juice (although hot pack rather than raw pack is recommended) so there is no reason to use instructions from other sources with the approved ones are available..

With juice rather than sugar syrup the appearance and texture will be affected - darker and softer - but if leaving out the sugar is important and you don't mind the different results then it does work.

Dave

Here is a link that might be useful: NCHFP - Canning peaches

I agree that it would be easier to peel if you did it right after blanching. I always add lemon juice in any of my water that the peaches touch. I just hate when all that hard work turns dark.

I decided to peel and slice them last night- they are sitting in covered bowls in the fridge in white grape juice with Fruit Saver added in.

Thanks!

is there a safety issue with fruit turning dark ? i don't mean as in letting it sit long, just long enough peel, cut and dump in the pot on the stove. when making applesauce i've noticed some varieties brown up much faster than others. i add apples as i go, like i do when cooking tomatoes, to prevent juice separation.

It isn't a safety issue, but sure doesn't look good. You usually use a bowl of water with either Fruit Fresh or bottled lemon juice to keep the peeled fruit in until you pack the jars or heat for a hot pack. That, or use crushed vitamin C tablets in the water. I prefer Fruit Fresh and I put it right in my canning syrup. It says on the side of the jar you can add 1 tsp. per cup of syrup you make. Most people don't realize you can add to the syrup. I also sprinkle it in my applesauce. My fruits are always bright colored and taste really good. Even if fruit turns dark during peeling, just putting them in the syrup with Fruit Fresh will turn them bright again. I never can fruit without adding Fruit Fresh.