In the 18th century several new styles arose; the plates of this period show sketchy scenes in the Chinese manner, with figures, trees, and architectural details executed sometimes in blue only (on a white ground) but often in various combinations of the colours mentioned. The keynote of the style was free and almost slapdash brushwork: effects were achieved by hatching and bold horizontal or vertical brushstrokes. Abstract rather than naturalistic floral festoons, bunches, and sprays were similarly rendered. (Source Encyclopaedia Britannica)
* Tin glaze = A glaze to which tin oxide has been added to give an opaque white finish.