I was reading a bachelor's thesis and it mentioned some technical details of a heated plate.
Part of the technical details:
MK2b Dual Power Technical Details 
Power Input: 12V or 24v
Copper boardd holes
Resistance between 1.0-1.2 Ω (12V) or 3-3.4Ω (24V)
EPCOS 100k thermistor hole
Functioning current PLA 8-9A, ABS 10-12A
[Accurate quotation above - typos are in the original]
The thesis I have is called : Bachelor_Thesis_3D_Printer_Electronics_Design.pdf
The details are on page 18.
Did he make a mistake with the Functioning current?
From my very little knowledge in electronics, based on Ohm's law the current for 12V input is 10-12A and for 24V is 7.05-8A. And it doesn't matter what material is used PLA or ABS.
Or am I not calculating it properly?