DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   Painting (http://www.diychatroom.com/f4/)
-   -   was my paint shaken enough? (http://www.diychatroom.com/f4/my-paint-shaken-enough-177594/)

Startingover 04-19-2013 06:23 PM

was my paint shaken enough?
 
Bought a gallon of gray at SW today. This is Harmony. I've painted my entire house with SW Super paint, using 5 different colors and never had this happen before.

When I opened the gray and poured some into a pan there were a few black streaks. Black was one of the tints. This gray is no darker than other shades I've used. Just a different color.

I have to go back tomorrow for a new roller so might take the remainder of the paint to be shaken again.

jsheridan 04-19-2013 06:55 PM

Probably not shaken enough. I had one one time that wasn't shaken at all, tints just floating. I had another on a multiple gallon order that was labeled but never shot at all. It happens. It could also have been a tinting mistake, like maybe the wrong base if it's bad enough. Once a base is saturated, meaning it's at its max tinting level, it will no longer absorb tint and the excess will simply end up swirling around perpetually. Colors that approach max tint level for the base will usually reflect a little swirl but not enough to make a difference. Take it back and ask them to shake it again, longer this time.

Brushjockey 04-19-2013 06:56 PM

They usually send you out the door with a wooden stir stick. Use it.
Everytime I pop a can I give it a stir. Every .Time.

joecaption 04-19-2013 08:10 PM

I bought two of these, one for a 5 gal. and a smaller one for a 1 gal. bucket.
Amazing how it works, it draws all the paint from the bottom to the top of the can super fast for a total remix.
http://www.bing.com/shopping/red-dev...rrer&FORM=HURE

I've never used a paint stick since I bought them. Far faster.

ric knows paint 04-19-2013 09:10 PM

Quote:

Originally Posted by Startingover (Post 1163002)
Bought a gallon of gray at SW today. This is Harmony. I've painted my entire house with SW Super paint, using 5 different colors and never had this happen before.

When I opened the gray and poured some into a pan there were a few black streaks. Black was one of the tints. This gray is no darker than other shades I've used. Just a different color.

I have to go back tomorrow for a new roller so might take the remainder of the paint to be shaken again.

Hiya SO,

Was the paint shaken up to begin with? If so, what you're describing is probably not due to the paint non being shaken up enough...What you're most likely experiencing is a not-so-uncommon phenomena called "synoreces" (and, yes, I'm sure that was spelled wrong). New formulations of paint necessary to gain VOC compliancy has resulted in a series of unintended consequences in the behavior of paint. One of the consequences of removing specific solvents (even from latex paints) results in a resin that begins to cure with even nominal exposure to air - even the amount of air between the level of paint in a can and the can lid.

Without these specific solvents to retard the resins want to cure, new, slower drying, exempt solvents have been added to the product to serve no other purpose than to "float" to the surface and act as a barrier to the layer of air in the can. This solvent float is clear, but will attract glycol, containing traces of tinting colorants, and appear on the surface most often as a black, gray, silver (etc) "stain"...

This "float" may begin within minutes, to a few hours, after paint has been shaken and is perfectly harmless to the product. It mixes back into the paint easily, or may be poured off before painting. To take the can back to SW to shake won't hurt anything, but it won't stop the process from happening again, though. Good luck and happy painting.

Startingover 04-19-2013 09:24 PM

ric, that was interesting and made sense. Harmony is a lower VOC so I do believe it.

joe, that's a good idea on the stirrer.

Brushjockey 04-19-2013 09:38 PM

Great! I say just pull out the stick and stir- ric says why to do that!

And joe says how to over do that!!

All is right with the world!
:thumbup:

chrisn 04-20-2013 03:56 AM

Hummmm, cheap drill, $45, paint stirring attachment,$4

Stir stick, FREE :whistling2:

princelake 04-20-2013 05:48 AM

but it took 1 whole tree to make that 1 paint stick! think of the environment!!!

JMDPainting 04-20-2013 06:00 AM

Quote:

Originally Posted by Brushjockey (Post 1163018)
They usually send you out the door with a wooden stir stick. Use it.
Everytime I pop a can I give it a stir. Every .Time.

This, always stir the paint before using.

oh'mike 04-20-2013 06:02 AM

Not exactly on topic----but always 'box' your paint---

Box?---When you get multiple gallons for a room, dump them all into a clean bucket and stir them all together---

This will help you avoid the heartbreaking situation that occurs when the last gallon is noticably off color---and you have to repaint the entire room----

Every experienced painter I know has a story like that-----

Startingover 04-20-2013 08:20 AM

I've heard to always stir but admit I didn't this time. Lesson learned.

ol'Mike, as a novice painter I'm not sure if I'll run out of paint or not. But I do try to stop painting at a certain area, like foyer or short wall, and do the entire section with new paint and not just stop and start in the middle of a big wall. Thanks for explaining what 'boxing' was.

I can't believe I'm almost finished with this 1,430 sf house. Except for some trim, 6 doors, porch ceiling and mst bath, which I'll do at a slower pace.

user1007 04-20-2013 11:04 AM

Quote:

Originally Posted by chrisn (Post 1163215)
Hummmm, cheap drill, $45, paint stirring attachment,$4

Stir stick, FREE :whistling2:

Yes but the question with both a drill attachment (and you should use 1/2 inch drill with hammer action) or a paint stick is whether to stir in a clockwise or counter-clockwise direction.

If you plan to use the paint and primer in one as a primer, always stir counter-clockwise. Paint should always be stirred, no matter how much it is shaken, in a clockwise direction.

If you are South of the equator reverse this.

Startingover 04-20-2013 12:12 PM

sds, does the equator really affect direction of stirring or are you pulling my leg?

Startingover 04-20-2013 12:16 PM

orange peel
 
deleted. posted in wrong spot


All times are GMT -5. The time now is 04:46 PM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved