An alternative support would be a rubber-tipped thermometer holder. As long as there is no relative movement between the object and the plate, no vibration isolation is needed. The JD-2 kit contains the chemical potassium dichromate in the bleach. Some elementary and middle schools do not allow the use of this chemical. In this case, JD-3 can be substituted because the bleaching uses copper sulfate instead, but an extra step in redeveloping using vitamin C is needed.
All detailed instructions accompany the kits.
This combination is used widely in Russia for recording holograms of their national treasures for public exhibitions. The holograms are the brightest ever made in silver-halide emulsion. If there is any doubt, it should be hot-glued to the table or floor where the hologram will be made. Figure 3 shows a more elaborate way of mounting an object. The upper parts of two of the screws can be used as stops when the holoplate is placed in front of the object for exposure, preventing any slippage.