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Inkjet paper negatives

Using this method preparing for the cyanotype process, but it is adaptable for others.

Image is inverted and prepared for printing.
Generic standard 80gsm plane paper.
Printed with settings for plain paper, standard resolution and monochrome.
On the backside of the paper. Use generic spray cooking oil.
Spread with a brush. Repeat till even or satisfied with transparency -it doesn't take much oil till its transparent but results may vary on oil/paper.
Ensure oil is spread well and dry or risk staining the paper during printing.

Not as sharp as transparency film.
Denser than transparency film. Exposure times are longer.
I normally expose transparency film for an hour in the shade for indirect light minimizing blurring.
Paper negatives needed around an hour and half in shade.
Painterly imperfections - oil splodges had a texture to the resulting image.
Flipping the image for ink to emulsion contact results in less imperfections.
Overtime the oil dries within the paper negative, becoming denser. They have a short life span, maybe a week or so. I imagine in certain conditions the oil could go rancid if long term storage was desired -but you could just print and oil another negative.