I am running some tests on pine similar to a job I have coming in. .75 X 5.5 in pine boards. the Letters are 120 pt, a little over an inch high. My issue is getting contrast, i.e. burnt brown coloration, in the letters. I have tried playing somewhat with the settings from the ULS materials BD, The settings of the example in the pic (taken with my Droid, sorry) are 63% power, 85% speed, 600 dpi and Density set to 6. It is not much different in appearance from the standard ULS of 50/100/500/5 other than I get less residue with the ULS setting (Wipes right off). I even tried moving the bed slightly closer and "re-running' the job.
What can I do to get the letters to look browner in the pine? No air assist.