1-2-3 Envelope punch board craziness

[LemurLover]

One of the reasons I bought this device was to make fat envelopes (really, just really flat boxes) for mailing cards that have embellishments, lots of popped-up layers, interior pop-ups, etc. The booklet shows how to use the device for such a box, but it implies you just use the same size paper as for a flat envelope. However, if you do that, when you fold up the edges, they butt up against each other - there's no overlap for gluing or securing the envelope shut. I've been fiddling with my first sample for a while, and not feeling the love. I should mention I'm using chipboard (like cereal or cracker box material).

I'm hoping one of you out there has made these dimensional envelopes and can give me a clue before I start pulling my hair out. Do I need to increase the paper size by the amount of the gap between the A and B scoring lines? And do I double that, because it represents the thickness of the finished envelope box on all sides? The punch guide can't be the same, either - do I add the amount of the gap between the A & B scoring lines to that, too? :confused:

Thanks for any help any of you can give me!

[muscrat]

I know that with the regular envelope punch board, in order to make a box envelope I add
1 1/4" to the paper size. Then add 1/8" to your first score line, move paper to the left an inch and punch and score a second time on that side. After that just follow the lines as you turn the paper

[LemurLover]

Thanks, Kathy! After I posted, I cut a piece of chipboard a quarter of an inch larger all around and just added about 1/8" to the punch guide - it was OK, but resulted in a very narrow ledge of about 1/16" to glue the flaps together, which I didn't think was all that secure. I'll try increasing it even more as you suggest.

[gregzgurl]

This link is incredibly helpful: http://www.thecraftyowl.co.uk/boxbuster/

There's another one for envelopes, too: http://www.thecraftyowl.co.uk/EnvelopeExpert/

[LemurLover]

Thank you, Sue!

[muscrat]

I had trouble understanding that site before but I tried it today and it worked fine! I'm wondering if I didn't understand that you had to put the fractions in a separate box to the right?