Francesca Bray has recently pointed to the neglected role of women in the history of Chinese technology. This article takes up one example, and shows that the work of one woman inventor, whose personal name is unknown but whose family name was Liu, may be securely dated to between 712 and 724. From later descriptions it is also possible to discern that her invention (or just possibly the invention of another craftsperson, which she was able to introduce to court circles) consisted of the bringing together of two carefully carved woodblocks to create a resist for dyeing cloth. Ths in turn suggests that she may well have been familiear with woodblock printing, an invention for which there are also other forms of indirect evidence at about the same time. Since her family was relatively prominent, it may in future be possible to find about more about this inventor from genealogical materials.