[Phpprintipp] printing pdf outputs wrong dimensions

[Eric Bontenbal]

Hi team,

I am working on an application that creates a pdf and then sends it to a 
labelprinter. If I open the pdf and I look at its dimensions it is 4x6 inch 
(288x432 points). However, when I send it to the labelprinter using 
phpprintipp, it does not fit the label. it is scaled roughly 130%.

when I open the pdf and then print, it without any scaling, from my desktop it 
comes out correctly.

So, I gues I am doing wrong something when sendin the document to the printer. 
I could not find a function which sets the paper size.

any help is most appreciated

kind regards, Eric Bontenbal