Jane,
    I have used both kinds. The one molded a as single piece which takes
the place of the frame and foundation. These are mfg. by Pierco
1-800-bee-comb. A member of our local club runs about 600 colonies using only
these. I use mostly Placticell which is availale through Dadant. It is a
founation sheet which is like wax foundation and has to be mounted in a std.
wood frame. Ref. Dadant 1993 catolog Page 6&7.
    Noticing your Internet address I am was wondering about your position at
StratusI. It is a target accunt of ours since we already supply one of
Stratus's copetitors?
 
DaleG