On Monday, May 21, 2018 at 10:22:21 AM UTC-4, Leon wrote:
> On 5/20/2018 11:06 PM, DerbyDad03 wrote:
> > I've been using this '1/8" method' to clean the brushes I use for oil based
> > primer. The primer is Zinsser Cover Stain, just white, no tint.
> >
> >
https://www.youtube.com/watch?v=DDvDbKBTbic
> >
> > I collect the used mineral spirits in a jar and let the primer settle out
> > so I can recycle the mineral spirits and use it to clean the brushes again.
> >
> > I've found that instead of the mineral spirits being clear after the primer
> > settles to the bottom of the jar, it is sort of an amber colored clear. I
> > don't think it's a matter of not waiting long enough because I've gone weeks
> > without touching the jar.
> >
> > The recycled spirits seem to work just as well as new spirits for cleaning
> > brushes, but I'm curious as to why it is no longer clear. What is in the
> > primer that would cause the spirits to turn amber?
> >
>
>
> Do you remember chemistry class, some ingredients settle and separate
> others remain mixed.
>
Yep, that's why I ask *what* is in the primer that turns the MS Amber. ;-) According to
Yes, my final rinse is with new, clear MS which typically results in a virtually clear residual.