Collection & distillation of rainwater.

Collection and distillation of rainwater is a must for herbal essence creation. The lab operator will need plenty of high-quality water from a reliable, known source. They will use good quality water for many processes in the lab. From dissolving ash after calcination enabling efficient retrieval of the salts, washing flasks & purifying various elements, good water needs to be in plentiful supply as the works progress.
Water also makes a decent solvent for macerations & extractions. We can add distilled water to other solvents like ethyl alcohol, the spirit preferably from the grape. Experimenting with water to spirit ratios to extract our essences allows us to finetune our methods. We may choose to use the municipal water supply. I would suggest we don't trust this water due to its levels of contaminants and heavy metals. We could distil it to remove any harmful additions. I still wouldn't advocate its use.
We should consider only using collected rainwater, preferably from a thunderstorm. We do this by ensuring that it has not been in contact with metal or the ground. Doing so determines it to the metal realm also; coming into contact with the ground discharges a subtle spirit.
For collection of rain or thunderwater, we are going to need the correct setup. A number of ways are possible. A bucket placed out to catch falling rain is one of the simplest methods. Take our collection indoors and begin processing “ distillation “ as soon as possible to minimise the loss of vital subtle spirits collected within it. Large plastic trays may prove a more efficient solution; cat litter trays, casserole dishes. Better still the larger trays sold in gardening stores that house several pots are a more efficient option.
The most effective method I have found is a large tarpaulin. Staked out or hung from any appropriate securing, tarpaulins have a large and very efficient collection area. I use a large six gallon bucket at one corner which is the collection point. The tarpaulin if staked out correctly can be folded at the collection end above the bucket causing a funnel like drainage point. On a good down pour the amount of rainwater collected can last us for many weeks.
The collected rainwater must still be distilled under low heat; sweat distillation is always best I have found. Its a slow process but the water collected is very high quality. I have found a very slow sweat distillation, does away with us having to make multiple distillations using faster, more active methods. The collected rainwater when tested for dissolved salts using an EC meter Electro Conductivity meter, should be zero. It should also be neutral PH. We can again use a meter or the test strips are cheaper and work just as well.
As a side note caution should be respected if we wish to drink distilled rainwater for health reasons. It is worthwhile to consider that our lab distilled water, or any distilled water for that matter, will strip the body of essential minerals if ingested as part of a diet or health regime. This can be prevented by balancing said water, with a pinch of good quality sea salt. This addition prevents the water from stripping our bodies of essential nutrients. Ensuring a healthier peroduct.