blackwork

/B L AE1 K W ER0 K/
noun
  1. 1

    A form of counted-thread embroidery that is usually stitched on even-weave fabric with a twisted thread.

  2. 2

    Work connected with funerals, as an undertaker's assistant or a maker of mourning clothes, etc.

Source: https://en.wiktionary.org/wiki/blackwork