I also read that article and corresponded for a time with Eric, while I started out. I am still working with Zias and while they may be "easy" to get an image with, they are far from easy to get a "fine print" out of. I had an email conversation with Carl Weese and there are certainly basics you need to get "fluent" with- paper humidity and proper (ie suffcient) coating. Plus, don't even bother trying to use the sun- build a UV light bank. I used 4 18" blacklight bulbs mounted side by side, and expose at a distance of 3". This solved some pretty significant issues I was having with paper drying too quickly and causing uneven exposure. Sure, it's fun to "get down to the basics" and make a picture using the sun, but if you want good and reliable results, a UV bank is needed. Easy to make (took me about 1 1/2 hours of construction and wiring) and cheap (about $150 in supplies).
I was later discussing further issues I was having achieving the soft subtle highlights and deep blacks of great Dmax that Pt and Pd processes are supposed to give with Paula Chamlee when I was there for a V&T workshop. She referred me to a gentleman in Oz named Bob Kersey to give me a hand. First of all, the advice of using a negative that is suitable for regular silver printing is *not* accurate. You need a dense neg, of contrast index 1.5 to 1.8. Plus, the papers popular for DOP Pt/Pd (Arches Platine and Cot320) are *not* good for Ziatype- they have too much chalk for ammonium based processes. I was really trying to love my results on Arches, because I love the paper. But it does not give a great Zia print. The basis for the paper issues can be researched by reading Mike Ware's website (I was refferred to him by Bob). He uses Buxton for his alt pros, but had no insite for it with Zia, as he doesn't do it. I asked Bob and he said it was nice, but $$$$ and requires Tween 20 if you want to go there. As stated above, the best paper for Zia seems to be Crane's Kid Finish. This is also the paper that was used by Dick Sullivan when he was developing the "modern" technique. I have also found that the old formula for Weston Diploma Parchment (used by Eric) is also nice. It gives a more neutral black tone where the Crane's gives quite a warm brownish tone. Bob's film and dev rec is HP5 rated at 400 in HC-110 at 22C for 7 to 7 1/2 minutes, in a high contrast scene, giving a neg contrast range of 1.5 to 1.8. The more I get into Zia, the more I find there is to it. But once the major film/development/paper misnomers were explained to me, I am having good success with quite nice prints. I'd say go for it, but follow the recipe until you have it down, then go from there- many options exist for contrast and color..... I think Carl wrote that he felt Zias could give beautiful prints comparable to DOP Pt/Pd with practice. I like Zia for the (relative) simplicity of the process and Carl's words are the carrot in front of my nose.
Tim