[Uncle Bulgaria]

Have you considered or tried drafting film? I've had excellent results using it with technical pens and print shops, then transferring the drawings to dyeline prints. As that process depends on transparency, and drafting film retains a good thick black line, perhaps it will also be good for PCB manufacture?

I enjoyed your account of Mr Peach which was very informative and rather fascinating. I can't say I'd heard of the company in any of its iterations, and am now sorry that I hadn't as it appears a good source is going west. I avoid buying from Amazon because of their corporate practices, so am always glad to find alternatives to their ubiquity. In this case, it looks like I'll have to scour the Homecrafts catalogue before it disappears!