I was trying to adjust some size the other day to match my colors (I know,
it is supposed to go the other way around but hey).
The size was too thick and I kept adding water. At least, I'm pretty sure
it was too thick. Somebody told me that if the size was too thin, it would
keep moving after you took out a patterning tool. When I pulled the color
into a pattern, it stubbornly flowed back towards where it had come from
(the opposite!) so I decided that it was thick. Water is the right thing
to add, rather than a surfactant or something else? (This was for marbling
with ProChem marbling paints, i.e. acrylics.)
Which brings me to the question of the surface tensions. Do you have an
intuitive feel for which surface is "more tense" if that is the right
question? Or is it just that they are sort of the same surface tension (if
you could measure that) but incompatible due to the oil/water thing?
I had used some colorless extender as a way of keeping more clear patches
open. when I put down color onto it, teeny drops of color leaped sideways
off the main drop onto places nearby. Once it even skittered around on the
surface before settling down. This is amazing to watch. Is this kind of
phenomenon common? If you saw that happening, would you automatically
think "Oops throw it all out" or "oops needs more <something>" ??
Any thoughts? Trying to build up my intuitions without ever having seen a
pro do this. (Anyone giving a workshop in New England?)
Thanks for sharing any experiences.
Cambridge MA USA