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hi dakka dakka gamers im making a super heavy tank by scratch and im wondering what size plasticard should i use that is quite strong hardly no flex and easy to cut through ive got some 1.5mm and its just to tuff to cut through
cheers liamlinford

1 mm isn't too hard to cut IMO...but a lot of people go through and use 0.5mm and just laminate two or three layers together. With a solvent cement, they are almost as strong as solid sheets.

cheers for that ive baught some 1mm thanks for the help

Also consider how you're trying to cut it. 1mm and up will be a pain if you try to force a blade through it in a single go, but a few light scoring passes will allow you to snap it pretty cleanly with minimal effort (less pressure also means fewer mistakes - too much force leads to shifting straightedges, wobbly lines, and slips of the blade). I'd also suggest at least some internal bracing, as most superheavies involve wide enough spans that even 1-1.5mm styrene sheet is liable to flex.

Consider bracing the card on the inside with sprue. It won't be seen if you are making a fully enclosed vehicle.

I've build the basic shape of my baneblade out of 2mm plasticard. The trick in cutting is like oadie said. Get a ruler and run the blade along it without much pressure. Your goal is just to make a small line on which to break the plasticard over a table edge.

The advantage of 2mm thickness is that you need nearly no internal bracing.
WIth 1mm you'll probably need bracing especially if you add more and more weight to your models in form of additional details. And also your models will be more stable and robust.