  The synthesis of reproduction in imagination has two elements, a synthesis proper and associations necessary for performing that synthesis. (Kant explicitly treats them as separate on A125: “recognition, reproduction, association, apprehension”.) Both start from the appearances, as Kant now calls them, which the synthesis of apprehension has located in time. At first glance, the synthesis of reproduction looks very much like  memory;  however, it is actually quite different from memory. It is a matter of retaining earlier intuitions in such a way that certain other representations can “bring about a transition of the mind” to these earlier representations, even in the absence of any current representation of them (A100). Such transitions are the result of the setting up of associations (which, moreover, need not be conscious) and do not require memory. Likewise, no recognition of any sort need be involved; that the earlier representations have become associated with later ones is not something that we need recognize. Memory and recognition are the jobs of synthesis of recognition, yet to come.