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Thinning CV

12/19/16       
Ryan Member

Hi,
I have been using SW KEMVAR PLUS conversion varnish, I sometimes have trouble with sheen variations, sometimes not. It says thin up to 55% I am using aaa air assisted airless , I noticed when I thin more I have less problems , but I am going over the amount recommended. It seems that the spray pattern evens out and doesn't collect in thicker streams on the outside of the pattern which is causing sheen variations. Also keeping the tip cleaned out is easier as well, when it's not as thin it is always gunking up constantly. I'm probably thinning about 10% over recommended amount. Also this might be a stupid question but when it says thin let's say 50% does it 50/50 or 2 parts to 1 part?

12/19/16       #2: Thinning CV ...
kevin

Ryan, i would assume your talking about the Pigmented kemvar plus since your reducing it 50% .. the clear conversion varnish doesnt require reduction (ive been using SW products for over a decade with great results).
50% reduction would be 50% of volume. for example: for one gallon of cv you would add half a gallon of kemvar reducer.

If you're getting tails on your spray pattern (more material towards outside of fan) it would be on the spray equipment side. maybe you need to tweak your air/material outputs. Over thinning your material may help but its not ideal.
What size tip/nozzle are you using and what brand AAA?

12/19/16       #4: Thinning CV ...
Jim Clark

what are you using for thinner?
If you're using lacquer thinner, it may
be part of the problem.
Most lacquer thinners are reconstituted
and are junk.
I use auto grade Urethane Reducer.
It works much better and you can get
slower and faster grades.
I most always use the slow grade, it lets it
melt in real good.
I also thin my CV about 40%.
That's like 10 oz of CV to 4 oz reducer.

12/20/16       #5: Thinning CV ...
kevin

With the sherwin williams kemvar plus, lacquer thinner will give you spotty results. (Like jim said). They have Kemvar Reducer that is intended for use with this product and does the job well. I use it in any pigmented jobs that are not being topcoated with clear. If im clear coating over the pigmented cv then i just use lac thinner in the color coat

12/20/16       #6: Thinning CV ...
Brent

I also had this same problem with SW water white CV. After several long discussions with the SW coatings team we figured out I wasn't agitating good enough. Sounds dumb but it doesn't remix as well as lacquer, which I switched from. All coatings are high gloss and the part that settles out is the sheen inhibitor. No problems since I bought a mixing drill bit from SW. Maybe this is the problem. I also quit over thinning the CV, its a different animal than lacquer and I figured it out finally.

12/30/16       #7: Thinning CV ...
Steve Member

Use R7K310 reducer for Kemvar Plus

1/19/17       #8: Thinning CV ...
Eric Member

I use the Kemvar plus and you butyl acetate up to 40% without effecting sheen

Gives a much better lay down and Is a fraction of the price of the kemvar thinner blend..

I mix my own pigments using Phoenix and 844 colorant...

Darker colors require using a blending clr cv as well as white...much thicker and requires much more reduction

at which time I have a butyl acetate, xylene and high flash naphtha mix that still is a fraction of the price..

Tails are not necessarily due to equipment..but if product is to thick,,for your 1.4 then your going to have a dry spray.

Try using a larger tip if your afraid reducing will affect sheen 1.8

Binks 2100's have a 66SS fluid tip that's equal to a 1.7


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