Silk Screen is very hard to capture because not everyone will see it. I have to look really hard, practically concentrate on white areas on my 5687w to catch a glimpse every now and then, but it's rare. Best comparison would be to go and get a pair of your wife's/girlfriends white pantyhose, tune your tv to a all white source such as a test pattern or some very white image, and stretch the pantyhose thinly across the screen. Then you would have something close to silk screen. Don't tell your wife/girlfriend I said to do that to her pantyhose. The blames' all on you brutha....
Disclaimer: Any pantyhose ruined by people reading this is not my fault in any way, and I claim no responsability for said pantyhose.