It is also effective on oily material. N ever use Ivory or any other dishwashing liquid as they contain materials that are intended to remain on the surface after rinsing. W ith Labtone and deionized water, there will be only a few discrete droplets of water left on the surface. AB Dick also markets these wonderful things under their own name. B e careful with solid shellac or shellac-surfaced disks.
Water can penetrate and swell the shellac causing permanent damage.
Avoid alcohols as they can quickly dissolve the shellac. Room temperature or slightly cooler water is best for washing any disks, but avoid warm water especially with the shellac. Wetting agents like dishwashing detergents or Photo-flo can exacerbate the blanching problem as some contain alcohols and they extend the drying time. T he trick with shellac is to expose it to moisture the absolute minimum of time, if at all. While I have heard of methods to make the mold drop off the wax surface, they are not practical since the mold has 'eaten' the wax which was in the space now occupied by the mold, and pits will be the result.