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Remediation Quest: Dyes and Big Pores

by Keith Kelly
posted 01-29-2017 11:54 PM


5 replies so far

View JBrow's profile

JBrow

1368 posts in 1304 days


#1 posted 01-30-2017 03:30 PM

Keith Kelly,

The surface tension of acetone is about a third of that of water so perhaps dissolving the dye in acetone would work. In addition I believe that the surface tension of water can be reduced if water is mixed with acetone. There is a good chance that the dye will dissolve in acetone without a lot of trouble.

Since acetone flashes off quickly, you would have to work fast. It is also flammable, so a well ventilated area with no open flames would be the safest way to proceed with acetone.

Here is a link to surface tensions of several other solvents, including acetone and water. Surface tension is given in the second column…

http://www.surface-tension.de/

View Keith Kelly's profile

Keith Kelly

320 posts in 2048 days


#2 posted 01-30-2017 03:58 PM

That’s a very handy link. I’ll bookmark that for sure.

I suppose the trick is, that Acetone has a surface tension of 25. Water 22. But, ethanol’s is 22. So, I am wildly surprised that dye in ethanol climbs out of the pores.

-- Keith | Subscribe: https://www.youtube.com/c/KeithsTestGarage

View Keith Kelly's profile

Keith Kelly

320 posts in 2048 days


#3 posted 01-30-2017 07:38 PM


That s a very handy link. I ll bookmark that for sure.

I suppose the trick is, that Acetone has a surface tension of 25. Water 22 wrong! should be 72. But, ethanol’s is 22…

- Keith Kelly

Shoot.. too late to edit that typo. Water has a surface tension value of 72.

-- Keith | Subscribe: https://www.youtube.com/c/KeithsTestGarage

View OSU55's profile

OSU55

2295 posts in 2374 days


#4 posted 01-30-2017 11:12 PM

Oak is the same way. My solution to this same issue:

Use a binder. A diluted wb finish, or even elmers glue all can work, the same way the guesso worked for you. An issue with these is lack of “chatoyance”. I eventually settled on using Target Coatings WR4000, a wb oil emulsion with good open time. I use the stain base and mix in transtint. Shellac does not have enough open time.

Leave the sanding dust from the last pass. Wiping the stain on pushes more dust in the pores and the stain colors the dust thus colors the pores. Seal the dye stain with a light coat of shellac if covering with wb top coat.

View Keith Kelly's profile

Keith Kelly

320 posts in 2048 days


#5 posted 01-31-2017 12:03 AM

Those are all brilliant solutions and your note about chatoyance makes sense (though I had to look it up.)

-- Keith | Subscribe: https://www.youtube.com/c/KeithsTestGarage

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