, fuse can be crafted with the following recipes

Autolearned
Player Recipe
Primary skill used: chemistry(1)
Required skills: N/A
Time to complete: 40 minutes
Tools required:
> 1 tool with chemical making quality of 1
> 1 tool with cutting quality of 1
> hotplate (7 charges) OR multi cooker (7 charges) OR charcoal smoker (7 charges) OR integrated welder (7 charges) OR atompot OR nearby fire OR chemistry set (7 charges) OR charcoal cooker (7 charges) OR hexamine stove (7 charges) OR gasoline cooker (7 charges) OR mess kit (7 charges) OR military mess kit (7 charges) OR lamp oil cooker (7 charges) OR soda can stove kit (7 charges) OR survivor mess kit (7 charges) OR CRIT mess kit (7 charges) OR heat cube (7 charges) OR heat cube (torch on) (7 charges) OR basecamp stove (7 charges) OR basecamp fireplace (7 charges) OR basecamp stove (7 charges) OR smoking rack (7 charges) OR basecamp charcoal smoker (7 charges)
Components required:
> 4x long string
> 1x water OR 1x clean water
> 7x saltpeter
> 5x sugar
Byproducts:
(none)

Autolearned
Player Recipe
Primary skill used: fabrication(0)
Required skills: N/A
Time to complete: 10 minutes
Tools required:
> 1 tool with containing quality of 1
> 1 tool with cutting quality of 1
Components required:
> 1x long string
> 1x water OR 1x clean water
> 6x black gunpowder OR 60x mixed smokeless gunpowder
Byproducts:
(none)

Autolearned
Player Recipe
Primary skill used: fabrication(1)
Required skills: N/A
Time to complete: 4 minutes
Components required:
> 1x rolling paper
> 3x black gunpowder OR 3x match head powder OR 30x mixed smokeless gunpowder
Byproducts:
(none)