In article .com, wrote:
You want the plastic screw in anchors that are designed for drywall but
should work well with plaster. They are rated to hold 50lbs each in
drywall. Otherwise you would want to use a toggle bolt, as the nail
and clasp will fail unless you are talking about very small,
lightweight pictures.

You've obviously never tried to hang anything on a plaster wall.

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Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.