Tynemouth is just across the River Tyne from South Shields, Jarrow, and Hebburn, and lots of Durham families moved back and forth across the river, following the colliery jobs and port-related work.
Quantity: * Whole number only. Components of the original formulation of Physical Developer are NO LONGER available. Physical Developer is a Silver Nitrate based reagent which reacts with the lipids, fats, oils and waxes present in fingerprint residue. The PD3 Physical Developer Kit is a faster process and ready to use by simply mixing the contents of three pre-measured bottles. Parts A, B & C. Instructions Included. NOTE: The use of Maleic Acid as a pre-wash for paper evidence is strongly recommended.
Silver nitrate reacts with salt to produce a dark colored residue. Since salt is often part of the latent print residue, this reaction allows yet another way of development or enhancement of prints. It must follow ninhydrin if sequential enhancements will be applied. If salt is present in the substrate, the entire object will darken. Silver nitrate reacts with light to darken also.