Hey Mark... like the poster above me said you will have a lot to learn. But I would have to disagree with the financial amount that was posted especially because you said you want to do it as a hobby... I started as a hobby and its still in that phase more or less, but I am starting to make it more of a side job that produces a income..
I have a 6 color 4 station press, olec 5000 watt vacuum exposure unit, 18x18 flash and a 24" by 8 foot long conveyor drier. I'm into the equipment less than a $1000. Granted I've gotten some really good deals buying used and its taken me about a year and a half to get it all. Along with curing shirts in my kitchen oven for the majority of the time. But it is possible to start small with a small budget especially in a hobby setting.
Get the book "how to screen print for fun and profit" that will tell you everything you need to know. Then post up here to fill in the blanks. Just don't get discouraged from people telling you to drop 10 grand on equipment, because it's not necessarily true
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