Sign Printing

Your not going to need a rotary printer to do political signs, but, if your client wants Tee's to go with those signs, then you'll need one. If your going to jump into it, may as well knock a couple birds in the head with a rock.
You can get away with just hinge clamps for signs. Mainly because you can only print one color at a time with signs. UV inks, or air-dry inks. Both can be found from (Tube Lite). The UV inks need UV light to cure. Not to worry though, just buy the bulbs and make a dryer.
The hinge clamps are about $20 bucks, you can find them at (Victory Factory), "they make the best screens". As far as your blanks for the signs, check out (Mum Power), they carry everything for signs. Even the clamps and inks.

Good Luck.

That would do the trick. Four is better than one. But if your going to go that far, why not go for a six color printer. Many a time you'll be faced with printing more than four colors on tees and then what?
The only draw back, or not, is that you'll need more equipment to get the jobs done. And feel free to ask all the questions you want...me or someone else here will be glad to offer advise from experience.

Sounds like you have the business to get up and running. And don't worry about sounding like a rookie, I started printing back in 81'. Have printed about everything and I'm still learning.
The things to look for in a printer is good registration and miro-adjustments. Without em' your not going to be able to hold tightly butted colors together. However, they aren't going to help much when printing signs. The dry time of the inks will slow you down to a snails pace.
It's better to make a custom board to hold the signs and print them all one color at a time. The custom board should be marked with the first signs outline so that each sign that follows can be placed in that exact position. On the exposure unit, fix registration marks to hold the artwork and the screens at the same position so that little registration is needed to realign the signs screens for the next color. It also helps to make the artworks colors slightly overlap each other so that any misalignment should not be noticable.
That sort of thing you need not worry about when printing shirts, since they are held down with adhesive spray and the screens are all aligned before you start printing. Plus, you will be using a flash dryer between colors to flash dry the plasisol inks and you can have all that speed. Believe it or not, printing signs one color at a time is just as fast as printing shirts all colors at a time.
As for screens, use a 230 to 300 mesh count screen so that not too much ink flows through and spreads out beyond the image area. "VictoryFactory.com" has been making screens for me for years and I have no complaints.
For anything that has to do with signs, check out "mumpowersignsupply.com". They have any kind of paint, inks, blanks and way too many things to mention.

Hope this helps...........

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For signs, I use Nazdar® 9700 ink. It air dries in 15-20 minutes (room temperature) but you can force dry it 40 - 60 seconds at 90° - 150°. That's what I do on my conveyor dryer.

To set up, I put the positive film on a sign that I'm going to print. I then set up the multiple screens to that positive that I've secured (on the sign board) to the platten. I then use two pieces of sign material butted to the left and lower edge of the sign board to give me my placement (registration) of the sign material for each print.

Signs are a quick and easy way to make some fast money!

J.R.