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Anyone know how to print onto envelopes?I meant to turn the envelope into the front cover/intro for a zine that didn't really explain itself properly, then when I got the zines in the post I realised I had no idea of how to actually print onto the envelopes!I realise I could've lino-printed onto them, or used one of those small stamps, but neither of those 2 options would have enabled me to use m…