motorbit wrote:i dont have a ph meter, so i have to follow the ammounts in the instructions. however, as these are not 100% precise i cant follow them 100%. i usually use 20% more lye then instructed in the tek. i feel a to strong base will not hurt but a to weak might.
i am aware i am wasting lye and that this is bad for the envoirement. but i think its better to waste a little more lye then to not extract as much as possible from the source material.
im not a cemicist, so i might be wrong.
Thanks for the input! I agree many aren't precise and leave a lot to be desired in the way of precision in order to properly follow the steps, thats why there are so many questions about them IMHO. But, is it still dangerous after extration with a NPS since the lye is used up? Im no chemist either lol, but at least at a minimum there is a water filtration plant down the line to take all the nasties out and recycle the water. Hopefully

pitubo wrote:No need to use a pH meter on strong lye solutions. In fact it will only damage the sensitive probe. Flush the probe with plenty of water if you already put it in strongly alkaline solutions. It will certainly need to be recalibrated after such abuse.
There is no problem in adding more lye. The more, the better it works in fact. Beware that it is better to first dissolve the lye in water and then add the plant material to it then to ad lye to the watery sludge of plant material. When lye dissolves, it heats up strongly and this may damage the plant's constituents.
Be very careful when handling lye! Use safety goggles and gloves.
OOPS!

Thanks, I never considered that, but at least its a cheap pH meter anyway. I will be recalibrating it soon. The pH paper test strips seem to say the pH is high enough but the meter never went high enough.

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