50 - A Prettier Sapphire Colour.
Instead of rocchetta frit, use fine crystal frit. Add the powder, as described above, with the same dose and rules. A lustrous and beautiful sapphire colour will result with which you can make your pieces. You will need to be sure, as said above, to add the colour to the frit. Always add the zaffer and the manganese to the frit, and not to the fused glass.
When it is added to fused glass, it does not take the colour well, or attractively.