Hi, is anyone know, if we send an A4 document with 3mm bleed to the print shop. what size of paper do they use? ( should be bigger than A4 right) So do they have their own standard papers specified to print and trim off as A4 ?
Print shops use oversized paper and typically don't print 1 copy - they will step it up to have multiple copies on the same sheet of paper and then they trim it down on a guillotine.
For A4 they might use RA4 or SRA4
If stepping it 2 up they'd use RA3 or SRA3
4 up - RA4 or SRA4
Depending on how large thir print machines are.
There are some digital presses can print SRA2 size paper
But it might be rare (it is where I live)
And then anything for large print runs are typically done on a lithographic press or similar
and they might use SRA1 or similar.
thanks a lot for clearing this up! Salute!