Hi

If you use a surface profilometer, a contact instrument,  it may cost you around US$ 250-300 per an hour of use of the profilometer.

Refer to ;http://www.filmetrics.com/opticalprofilers/profilm3d-for-roughness

If you use an atomic force microscope(AFM),a non-contact instrument, it may cost you around US$ 1000 per an hour of use of the AFM.

Refer to;

https://www.asylumresearch.com/Applications/SurfaceRoughness/SurfaceRoughness.shtml

Please check with optical companies which provide such services.   

Many thanks Khaled.

Dear Daniel

Naturally, what was Karol has suggested is an excellent way of saving money.

I do applaud Karol for such suggestion.     

Hi Karol. But how much lower?

I invite you to visit our university in Babylon to make charge free tests for  your samples. 

:) Thank you Mr. Haydar!!!