In article
<Fmq3c.92225$aH3.2809575@bgtnsc04-news.ops.worldnet.att.net>,

The question would be better phrased do the Besler negative carriers
allow for black border printing. The answer would then be is it a full frame
carrier. If it is not then you must file the carrier out to do so or use a glass
carrier. You are better off getting someone to special cut the Newton glass
for the carrier you may have.

KM

Do the Beseler enlargers leave enough space to print a black border around a
6x9 negative? And is there an aftermarket antinewton glass negative carrier for
them? I think I'd prefer these to the negaflat system

There is or was a 6X9 glass carrier for a 23C. But I am sure it will not allow
enough space to print the desired glass border. Instead place a weighted mask
the size if the easel framing on the print, lift or remove the blades and use a
flashlight to expose the remaining paper for the effect you desire.
If no to the above send me a 6X9 carrier and I will cut it out and mount glass
in it. Please reply privately.
Bob  AZ

I don't think there is a "negaflat system" for the Beseler 23.