ABSTRACT
It is the intent of this paper to discuss the questions and problems in a fashion that will stimulate further in-depth study of adherence testing and the interpretation of its results. Detailed treatment of some issues is beyond its scope; earlier authors have discussed them (e.g. [2, 11, 24]). Moreover, an extensive bibliography [13] and critical reviews (e.g. [2, 10-12, 15, 16, 27]) of most methods used for adhesion and/or adherence testing have already been published and will not be dealt with extensively here. Testing methods will be described only to the extent necessary to facilitate presentation of the ideas broached here.
