Never tried the salt.....but the Clorox...ugh....made the paints fuzzy if I
used enough to preserve size, if I cut it down to a tsp. per gallon it did
Talas has a size preservative, or at least used to, but it is made with
formaldehyde....it nearly keeled me over just opening the bottle. Awful.
I think the best bet is to mix up only what you will use for the day and
keep it cool. I also make it with a little extra size powder in summer,
which compensates for the loss of viscosity in hot weather. That works like
I use excruciating hard, lime filled tap water for my size and it is
great.....no complaints. I use distilled water for the paints I
manufacture, because if there is ever a problem we can always rule out the
water. I do notice when I teach in NYC though, with its soft water, I need
less carrageenan powder to get the same viscosity.
I may try Jake's filter for the fun of it!