Vitreous slips develop their own shining. Usually they do not need to be coated. In order to achieve even stronger colours a coating with a transparent glaze is possible. Vitreous slips are applied on to biscuitted shards. The range of colours can be optionally increased by colouring the white vitreous slip with oxides and stains.
Illustration: the upper sample of the vitroues slip was burnt at 1050°C; the lower sample at 1150°C