When we screen playfields we aim to have every playfield a Gold but the medium is wood which is a living medium AND silk screening is not an exact science. We usually have about 10% of the fields culled as Silver and Bronze, but Shit Happens as they say and we have had as high as 40% go Silver or Bronze and we won't know until its finished printing. It takes months to get any number of PFs to the point that they can be screened. We can screen roughly one color a day but the white layer takes two because we do it twice to give a GOOD solid base for the layers of color above. This allows the colors to pop better. The long and short of it is a 14 color job can take almost 3 weeks of shop printing time. It basically impossible to go back and reprint the hopefully few Golds and Silvers.
With silk screening we USED to be hooped. Things should be much better now at least in some cases. Now if we silk screened a run and had some Silver or Bronze results we could sand them down and run them through the digital process. If we are using digital prints, like Mirco of course there are no Bronze, they are all as perfect as Mirco's. Because if they are not you just sand them off and do it again. That being said I still prefer a screened PF, it might be the collector in me and in most cases I can't easily tell them apart unless I examine very close up and in some cases with a magnifying glass. The big give away that's its digital is the fades are perfect!! LOL.
It would be impossible for us to promise a GOLD to everyone or, in fact, to anyone at least with silk screen PFs. Most are gold but again its a little bit of a gamble for us.
Mike