Re: Newton Squashed Under Pressure (photogravures)
Tiny speckles? Newton rings generally look like tiny gray-black droplets or spots of varying sizes on the print from my experience. Not speckles. Could you please post an example or two and indicate the problem areas?Hi all, After a long time of troubleshooting this problem I've had of tiny little irregularities of tone, not measles, but speckles... This is my current thinking. They ARE caused by Newton's rings between both the imagesetter film and Pictorico OHP and the glass of my vacuum table. It's been suggested it was caused by not using enough pressure when printing (intaglio), but what I have found is that additional pressure does eliminates the speckles ***which have been caused by newton's rings****. Furthermore, the reason my speckles are tiny and numerous, has to do with vacuum pressure of 22". The more pressure I use, the smaller the rings become, but they also become more numerous.
I'm confused. Why would solving newton ring problems allow you to use less pressure on the press? Polymer photogravure always requires alot of pressure to get a crisp impression. No way around that.My goal now is to settle on one of the several solutions to Newton's rings (clear spray on the back of the inkjet positive, frosted mylar, Kreene plastic, etc ), so that I can use less pressure when printing, reducing wear and tear on my press over time (not to mention my biceps are beginning to develop to Popeye proportions :^O )
The standard, coarser aquatint screen results in speckles in the final print, which is why I don't use it...is that what you're seeing?