Yellow and black tips

Lets forget about crisp edge lines for a minute. I think a black 519 will put down a more uniform line from edge to edge than a yellow 519. I'm thinking this because I have seen a lot of lines that have almost disappeared except for the edges. Having said that, I will still use the yellow tips except when doing stencils. Note: just picked 519 tip at random.

OK.

Rock, a lot depends on the viscosity of the material you are spraying and some traffic paints are more prone to viscosity changes in low temps than others. We have seen latex and CR get much thicker in extremes whereas Acetone or some other alkyd traffic paints are affected far less. When the material is more viscous (thicker viscosity), we have found different tips. pressures and procedures are necessary to get a more even consistent atomization across the fan width of the spray tip. This often means using something other than a yellow line laser tip.

Hey Randy, I totally agree with you about the viscosity and temperatures. Having said that, when spraying stencils with a yellow tip you get more of a defined edge on the spray pattern but, when using a black tip you get more of a uniform pattern across the stencil with no noticeable edges. So that's what led to my statement about the yellow and black tips. ncstripe1, didn't mean to wake you up, go back to sleep.......okay?

Rock what pressure do you spray your stencils at? I only notice the edge thing if mine is turned down

I really never look at the pressure, I adjust depending on the viscosity of the paint. I try to use as little as possible to reduce any over spray and still get good coverage.

The best pressure is what ever produces the best results, it can vary from bucket to bucket or day to day.

We also almost never pay attention to the actual pressure in psi. Pressure is adjusted exactly as Straightline mentioned. When I am spraying epoxies, I am constantly adjusting pressure as each batch of epoxy is changing due to pot life and the material temperature.

I agree I adjust the pressure too. I did not mean what number it was set to I meant is it low or high. Because when I turn it down low is when I notice the edge thing. I should have stated it better