FAQs
Dichromate
Dichromate holograms have been used in the past to make pendants and key rings.
The process involves coating a flat substrate, usually glass with a layer of gelatin im- pregnated with potassium dichromate. After exposure in the holographic camera the material is processed in a series of alcohol/water mixtures. The process is labour in- tensive and as such production is now almost entirely in the Far East, though one or two specialist manufacturers still exist in the USA.
The final product must be encapsulated to prevent moisture attacking and destroying the gelatin. Common examples would include watch faces, jewellery and 1-2 inch holographic pendants of a pyramid or Egyptian Cat. Some beautiful full colour examples exist.
These are expensive, crafted holograms and have almost entirely been superseded by photo polymer.
