The compartment pockets of Secol A-S Pages provide a ready made structure for many formats of material, but when an archive comprises infinite variety of smaller items then Mounting Inserts are the solution. Heavy weight 315 gsm ivory coloured board in A4 and A3 formats provide a base for mounting up all kinds of materials from photographs to bus tickets, with the additional benefit that they can be suitably annotated and labelled to provide the complete story. Inserts possess a 2% Calcium Carbonate buffer to neutralise any residual acidic traces in your material. (use with ""V"" Mount).