Another thing I've found is that line edges are a lot more jagged
on edges that are perpendicular to the travel direction of the
inkjet head. This effect was noticed on all printers I've tested.
Some of printing tests were more pronounced than others.
Adam Seychell wrote:
>
> Stefan Trethan wrote:
>
>>i am not too convinced that the "darkness" is most important to be
>>measured...
>>
>>do you really have problems with the whole printout being not dark enough?
>
>
> Not really.
> I've mainly used epson stuff which is very dark, so I've never
> had problems with overexposure. I've also made a couple of boards
> using the HP stuff, which isn't as dark (sorry I can't give you
> relative absorption numbers :)) and also didn't have problems
> with overexposure.
>
> I agree that line edge jaggedness and pin holes are more
> important than overall darkness since many of the inkjets I've
> tested seem to look dark enough so that exposure times can be
> resonably flexable (+-30%). However the most importantly defect
> is banding due to blocked or partly blocked jets. This can easily
> create a discontinuity in a track. Other problems are ink
> splattering which I have seen with some refillable inks on my
> Epson. If the splattering is severe enough it can actually create
> a short between closly spaces tracks.
>
>
>
>
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