I am unable to locate a source for a white plastic wash tray with ridges on the
bottom, often used in cleaning paper or textile objects.  The main suppliers
(Gaylord, University Products, etc.) only seem to carry the flat bottom trays.  I
find that many artifacts will "stick" to the bottom of the flat surface tray when
washing.  Does anyone know of a supplier for these "ridge bottom" washing trays?

Laura Binns - Conservator
Canterbury Shaker Village
marbles @totalnetnh.net