Re: inkjet,how do you know if you have a morie pattern
Answer #1 = skill in file preparation ($$$).
Answer #2 = Use a real dot technology such as Serendipity Black Magic to make a screened dot proof on a good inkjet printer. The BM polls the ripped data and makes a proof to match. There is some smoothing as the resolution must be resampled down to the inkjet's res but serious moires will/do show. It will catch all but the most devilish of moires. And match the plate data which IWA is for more important.
Answer #3 = If the output engine such as a plateseter is poorly optimized, you can even get a moire caused by the drive mechanism of that output device so a carefully calibrated output is mandatory, IMO.
John W