Amber Colored Mineral Spirits (Used)

May 21, 2018 4 Replies
D

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.



formatting link



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?


Vote
Twitter Facebook LinkedIn
L

Do you remember chemistry class, some ingredients settle and separate others remain mixed.

I typically keep two jars of MS. One for the initial cleaning and the second to clean out the other colored stuff that has not settled out of the first.

Vote
Twitter Facebook LinkedIn
D

Yep, that's why I ask *what* is in the primer that turns the MS Amber. ;-) According to dadiOH the answer is "linseed oil".

Yes, my final rinse is with new, clear MS which typically results in a virtually clear residual.

Vote
Twitter Facebook LinkedIn
D

The oil isn't the primer; it is the binder - what keeps the primer in place on the wall after it dries.

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required