And a Great Reply from Paul it was
Here’s a copy of the reply, in case anyone else might find the info usefull
The templates for the Zeta are 29.19mm x 51.30mm but I would add 2mm to those sizes to allow placing the templates easier on the image so I would size the image 31.19mm (3.2cm) x 53.30mm (5.33cm), don’t forget if using a image with text or a object really close to the edge of the image, you need to allow for this extra margin that will be trimmed off plus there will also be 1mm of the label to trim off the end of the tubes as I’ve allowed a 1mm overlap at each end of the tubes to make it easier to position the label on the tube, this excess will need trimming off with a craft knife before casting, a couple of trial prints may be a good idea.
With regards to labels I use the weatherproof matte from a company called onlinelabels.com but there is a minimum order of 100 sheets which cost around £60, I have only tried one other make of labels which were a lot cheaper at £6 for 25 sheets, but they just weren’t any good for the job, ie any ink I applied to the edge of the paper just bled in the resin (hint: I carefully colour the edge of the seam overlap with a matching coloured sharpie, to help hide the seam) the other problem with this other paper was that the tubes showed through on just about every blank, with the online labels ones, even white backgrounds didn’t show through on the brass tubes. I would suggest looking on amazon for weatherproof matte labels, they are usually a vinyl type label rather than paper.