Berntsen mainly works with textile, by which she is looking for connections in- and outside the art world. A recurring theme is that she is looking how craft and tradition can be of meaning today. Everyday encounters and happenings are highlighted and made special. Next to that, there is a continues play with the sensation of time. Certain moments are captured, but these are also transient and changing. An ink that bleaches in sunlight, an accidental stain causing irrepairable damage, an old rag that is repaired but slowly falling apart again. By transforming, making abstract and working with these transitory mediums, she finds a sense of freedom.
Her graduation works consist of several works on textile, amongst which the project Blueprint of matter, blueprint of mind. This project started with a series of cyanotype wallhangings made on old tablecloths. The sun, shining low in the shy, has left a long shadow showing us several dining scenes. Next to that, these images have been transformed into newly woven damask. In this way, the works not only speak of a past, but are also given a future. This damask comes in a limited edition production to return to every-day use, as well as a sculpture that is floating just above the ground. Other work, such as De blauwe druifjes voor het huisdierenkerkhof (the blue hyachinths in front of the pet graveyard) captures part of her parents garden in silk with these abstracted residue of plants. At first glance resembling an abstract landscape painting, but on closer look one sees that the image is in the silk. In Portret zonder gezicht (Portret without a face), this is highlighted by showing the work in front of a light. This portrait of the crown of one’s head one can see that the ecoprint is not just on, but sunk into the material. This attention for closeness and detail is something Berntsen values. She hopes for the viewer to let their eyes wonder.