What is A1 and A4 licencing in retail?

How to scale from 1:100 in A4 to 1:100 in A1?

• I have a copy of a series of 1:100 scale floor plans given to me from a single A1 paper to a single A4. It says its in 1:100 scale (but no longer to scale when shrunk to A4 from A1) How do i use a photocopier machine/printer to magnify/re-size that A4 plan to A1 when i can only print maximum A3 size. (a single floor plan in 1:100 from A1 CAN fit an A3 Paper).

• Answer:

  You can take the plan to a print & copy centre that has a copier with a scaling function. You can calculate what percentage the plan was shrunk (e.g. 12.5% of original size) and calculate the inverse scale factor (e.g. scale to 800%) and use that, or use trial and error checking the resulting scale. Since the plan on A1 paper can fit on A3, then it must not have been scaled to the extent in the example I gave (for A4 to A1 paper size) and should be in the scaling range of a photocopier with that feature. Calculating the scale factor will yield the most accurate result, but photocopiers generally scale a copy in terms of percent of original size.