Says who? Grainger and McMaster-Carr both sell GR10-FR4, uncoated, for about $10.70/sq ft. for roughly the same thickness as a lensboard.
Their aluminum prices are twice that for the same thickness in aluminum sheet, and around $15 /sq. ft. for aluminum plate.
That's all retail-- I assume bulk/wholesale purchase would be cheaper, but I would also expect the relative pricing to be about the same.
If I were Max, I think I'd feel somewhat insulted that someone felt I hadn't done my homework properly before making such a choice.
Bookmarks