[comp.sys.mac] Imagewriter LQ prints only BOLDface?

risto@cad.Berkeley.EDU (Risto Mutikainen) (08/05/88)

I don't know if this is addressed before, I have not seen...

For me it appears that all the text IW LQ prints seem to be in
boldface, by appear. Text is just too heavy, especially Times and
Helvetica - Courier looks better, but who wants fixed font everywhere.
Yes, I am using the right paper lever setting and printing in the best
mode, 216 dpi. Setting the lever for thicker paper makes dots
disappear from upper and over edges of print head pass. And yes, the
ribbon is quite new, printed perhaps 50 pages.

I checked the fonts (bitmaps), they look just all right. Next thing to
suspect was the actual point or pixel size, what the print head
prints. To my surprise (and explaining the 'boldface mode') the points
overlap significantly, here is the table:

theoretical fill /%	observed fill /%

100			100
50			90-95
25			70
12.5			50

The printing was made from bitmapped pictures with 66% reduction, so
that every one/2nd/4th... point was printed. The fill was checked both
just by eye and by measuring the reflected light, they gave similar
results. So, 100% fill (black) and 50% fill (standard desktop) look
almost similar, when printed in best mode.

In summary, even though there is 216 dpi on the output, it does not
mean that the printed pixels are 1/216th of inch size, they are more
like 1/100th or so. To get good-looking text output, one needs to use
trimmed fonts, the normal font gives already the boldface - at least
with my printer. Luckily, I got the Fontastic+ just a week ago and can
trim the fonts, it just takes some time... Does anyone know about slim
fonts of sizes 27, 30, 36? With the larger sizes print quality is of
course better, the proportional fattening of the fonts is smaller.  Or
has Apple released modified versions of those fonts for LQ to make
them look natural? Accurate graphics drivers (printing e.g. the fills
in best mode - I don't know if there are any available except with the
66% reduction) will screw up the output, even though they print
'correctly'.

... lots of normal disclaimers ...

Risto Mutikainen
risto@cad.Berkeley.EDU, risto@ucbcad.bitnet