Paint Shaking Made Easy

[Fitz]

Not shaking

I'm a big fan of Vallejo acrylics, but they suffer from the same issues that almost all paints do, and that is that the pigments tend to settle out of the medium. They have to be stirred or agitated to mix the two components to get good, even coverage.

I've shaken the bottles manually for years, but I finally got sick of that and decided to go for a mechanical solution.

This is a very cheap jigsaw. Brand new, it cost me about twenty-five bucks, but if you're even stingier than that, they're easy enough to come by second-hand.

Shaking

I wrapped the blade with multiple layers of masking tape. This serves several functions:

• I'm less likely to accidentally cut myself (or anything else)
• It provides a visual guide as to where the blade buries itself into the body of the machine. A paint bottle can't go below that point or it will be knocked off as the blade oscillates.
• It provides a fairly good non-slip padded surface to keep everything in place while the saw is running.

I considered attaching some rubber non-slip mat with double-sided tape, but I haven't found that necessary — the masking tape appears to do the job adequately.

I experimented with various means of attaching the paint bottles — rubber bands (too fiddly), little spring clamps (OK, but too small a contact area, and they tended to crush the bottle) — and finally settled on this one. It's a simple paper clip with a long curved barrel that provides good, firm attachment. I haven't yet had a bottle come free using this.

For best results, one should add one or two agitators to each bottle of paint — short lengths of pewter sprue work well. But I've got a lot of bottles of paint, so I tend not to bother except with especially problematic mixes. This thing will give me the equivalent of half an hour of manual shaking in about 30 seconds, and it generally does the job just fine.

One note: I've found that vigorous shaking sometimes seems to pressurize a bottle of acrylic paint slightly, probably due to bubbles forming. If there's paint in the neck of the dropper, this can cause a small volcano of paint when the bottle is opened, so I've taken to whacking the bottle base-down on my workbench a couple of times after shaking just to clear the dropper before opening.

[Silent Invader]

Ingenuity is always cool 

Not sure if you have tried it but Vallejo also have a 'squeezing and rolling' technique for redistributing pigment:

2.7. I have a problem with Model Color, it does not seem to go on smoothly.

The pigment may have settled too much. Add two drops of Crackle Medium (70.598) and mix the contents of the bottle by rolling it between your hands.

2.8. I have some paint I purchased years ago, and pigment has separated from the binder. How can I best restore the original mixture?

The best way to stir the product is not so much by shaking the bottle, as by squeezing the bottle and then rolling it between your hands. Please us this method and try the color on some other surface first to see if the blending has been successful. Also see point 2.7 for trying to restore balance between pigment and binder.

http://www.acrylicosvallejo.com/m/en_US/model-paints/faqs/3

[OSHIROmodels]

I've seen a couple of videos that use a speedy clamp in place of the blade.

cheers

James

[DELTADOG]

Best Thing ever for mix up paints is an old Laboratory Vortexer! That thing even blends 10 years old syrup like paint.

[FifteensAway]

Small BBs are your agitating friend.  Found wherever sling shots are sold.

[snitcythedog]

Nice work around.  Probably cheaper than what I did. 

[Fitz]

Small BBs are your agitating friend.  Found wherever sling shots are sold.

Lead BBs good, steel BBs bad (rust contamination). Haven't tried the airsoft plastic BBs, but I doubt they'd have enough mass to be useful as agitators.