Substituting of ethyl silicate with ecologic sols of colloidal silica in
the investment casting technology, resulting from the increased demands
concerning environmental protection, caused the prolongation of
production cycle for precision castings produced in multi-layer
thin-walled ceramic shell moulds. Modification of Sizol 030 binder with
benzoyl peroxide, proposed in the paper, was aimed at restriction of
time needed for realization of a single layer of the shell mould, and by
the same, of such a mould as a whole. Examination of kinetics of the
drying process were held for the layers made of prepared moulding
material and the influence of binder modification on the mould curing
time was determined.