Do you want to regress your bees back down to a more natural cellsize in the broodnest? It can take some time and sometimes it’s a little bit tricky. Most often they fail to directly from what’s been most common for years now, about 5.4 mm, or 54 mm over 10 cells over the parallel sides. Down to what’s often talked about – 4.9 mm. There are many different stories. Without mentioning any other way down I go directly to the very quick and thus the cheapest way.
Mann Lake Ltd – http://www.mannlakeltd.com/beekeeping-supplies/page19.html – has a standard frame, their cheapest plastic frame, a good sturdy frame, in yellow or black, in full depth Langstroth or medium size. It happens to be below 5.0 mm, almost 4.9 cellsize. And its cell walls are high enough to be very difficult for the bees to override. So – take your ordinary package bees or whatever bees and give them waxed PF100 (Full depth) or PF120 (Medium). They will follow the pattern and draw nice 4.9 (almost) combs. Anyway I havn’t heard of anyone who has failed yet. After a couple of broodcycles you can add wax foundation if you want to, or use foundationless frames if you want to try that. This beekeeper did that – http://www.eccentricbeekeeper.com/hives/medframe.html – he used glued popsickle sticks as starters for the bees to draw comb.
You can use a mold to make your own foundation of 4.9, buy it – http://www.swienty.com/shop/default.asp?catid=1121 http://www.alfranseder.de/Foundation-Mold.html – or make your own mold – http://www.resistantbees.com/guss_e.html – or buy a roller mill – http://www.swienty.com/shop/default.asp?catid=1120
You can buy wax foundation from Dadant – http://www.dadant.com/catalog/advanced_search_result.php?keywords=foundation&search_in_description=1&sort=2a&page=4 – another good source is Biredskapsfabriken in Sweden with low residue wax – http://www.biredskapsfabriken.se/en/lista.php?kid=14-33
If you live closer to Sweden than Mann Lake Ltd, you can buy their plastiv frames from here – http://www.hoglandetshonung.se/?page_id=58
Another good reason for using plastic frames or foundationless is that you can be sure the wax is (almost) residue free. Chemical residues can be problem if it it’s more than just a little. One of parameters behind the complex that kills our bees.