Re: Acrylic Ink - UV cure ink perhaps
There certainly are UV-cured inks of a consistency to be used in letterpress printing. There are several manufacturers of these inks and I have seen very successful results using them in label applications. Flexo inks are too low in viscosity to work well.
One of the biggest problems with the UV-cured option for most of us is the equipment investment and floor space required. The UV-cure units for sheet-fed applications of any size (I'm thinking posters and broadsides) would run $8,000 to $18,000 unless you could find used equipment.
If the equipment were available, it would seem to be a good choice for demonstration purposes, but not for historical re-enactors.
Keep your eyes peeled for good used equipment in your area.
Cedar Creek Press
--- In PPLetterpress@yahoogroups.com, "KalleP" <kalle@...> wrote:
> Hi Sam,
> I wonder if any of the UV cure flexo inkc could be made to work. One would have to exclude daylight and bright fluorencent from the ink plate nad rollers. I have pondered it for proof press as stay open ink and also for printing on labels at craft market as well as static cling vinyl (clear no-glue labels for glass) as it does not need to be absorbed or reacted with paper.
> Have not found any mention of UV ink use in 3 years of reading about letterpress topics on the net, have not got samples yet but who knows, perhaps soon.
> Idyllic Press / Calrose Typesetters
> Johannesburg, South Africa
> --- In PPLetterpress@yahoogroups.com, "Nielson, Sam" <nielsons@> wrote:
> > I use the acrylic inks for some things. I do a number of demonstration sessions where the visitors get to use the handpress and print a sample sheet to take with. For me the acrylic inks work well. I can put out the ink for a session, say at 8 am, and have sessions throughout the day and into the evening, printing from that same ink. It stays open (thickens a little though) literally all day. We are in a commercial building and with their air handling systems there is a higher artifact level in the air, so we get some 'fuzz' into the open ink. (I could probably put a shallow cover over the ink glass to prevent a lot of that, when not in use.) I've had type that didn't get cleaned very well (go figure, a student not cleaning up very well?) and as late as a week later the ink was still viable. Makes a mess of your fingers while typesetting. This demo printing is done on a heavier weight of Cougar opaque paper.
> > The acrylic inks, though, aren't as nice for the visitors/students themselves. They have to walk out of the shop with a wet printed piece. So they have to put up with carrying a wet ink piece to classes, etc. I feel bad about that, but to use oil- or rubber-base inks under those conditions, I would have to clean up several time during the day, and may even delay some of the printing sessions to complete.
> > It would be nice if there were a better fitting ink that would still be useable all day, and yet would dry fairly rapidly on paper. The acrylic inks typically dry by absorption mostly, which can be a slower process. So if there were a formulation of acrylic, or other type of ink that would act like the acrylic on the plate, but on paper would act like oil- or rubber-base ink (drying both by absorption and oxidization) I'd buy a bunch.
> > I use oil-base inks for projects, where I put ink out, use it for the project, and then clean up immediately. I use it for the nicer side of the printed objects we produce as well. I think it is more durable on the finished piece. For these types of projects we use nicer grades of paper, like German Ingres mould-made papers, and on up.
> > Printing is a smallish part of my job, so having to clean up after each session to get ready for the next, a couple hours later, starts to eat into my work day more significantly, and then the boss gets more concerned about my time.
> > So anyone with suggestions, pipe up.
> > Thanks
> > Sam Nielson