This might be a pretty dumb and obvious questions, but how do you determine if your wine is finally cleared enough for bottling?
Do I put it in a glass and swirl it around? Hold a light up to it? Keep racking until there is no sediment at the bottom anymore?
The wine kit I am using suggests that I bottle just 14 days after I've racked into the cardboy post fermentation. We racked on Saturday to the Cardboy and I can see sediment on the bottom right now, but when we were racking through the siphon, it looked pretty clear already. I've added all the clearing agents below:
Kieselsol & Chitosan (Clarifiers) Potassium Metabisulfite – For the Degassing, Clearing and Stabilizing step. Not for Use on Equipment. Potassium Sorbate (Prevents Refermentation)
Not dumb at all, it's a very common question and has lots of variables and is confused by speedy kit directions. Here's my take.
With white wine, it's pretty easy to see the clearing take place, and when your wine is free from CO2, is crystal clear and you can read a newspaper through the carboy, you can bet that it's clear enough to bottle. With reds, which you can't see through in a carboy, it's a little harder, but not a big deal. Pour a little wine in a wine glass and take is somewhere well lit, tilt the glass sideways, and look up through the wine from underneath, this will reveal a lot in terms of clarity.
The other items you mention that have an impact upon clarity, degassing, Kieselsol / Chitosan, and racking off of sediment as it accumulates are particularly important. Even with the use of your clarifiers, the wine will struggle to clear if it still has CO2 in it, and the CO2 will not go away once it's bottled, so it's important to have a wine that is gas free to aid in clearing, and prior to bottling. Degassing is a frequent topic here, if you search it you'll find many threads to read. The short and skinny is that degassing by agitation is difficult to accomplish in a short period of time, degassing with vacuum assistance (whether vacuum racking or straight vacuuming) will get you there pretty quickly, and time in the carboy is a sure fire method as well. Many of us omit the use of clarifying agents and just let time do its thing, and typically bottle in the 8 - 12 month time frame.
Lots of folks also omit the use of sorbate, but only for wines that have: 1. Finished dry (SG of .998 or lower) and, 2. Will not have sugar added back to the wine to sweeten it.
If you have the patience, follow the instructions through the process up until the time to bottle, and then plan to bulk age your wine in the carboy for several more months, you will almost certainly see additional sediment accumulate in the carboy, which means it won't be in your bottles. During bulk aging, rack the wine every three months (if you have sediment) and add 1/4 tsp of Potassium Metabisulfite at the same time. It's also a good time to be using oak adjuncts to flavor your wine if you would like some oak flavor in your wine.
If you have any questions, don't be shy, someone will jump in and help out!