determiner / pronoun / adverb
some
SUM/sʌm/
An unspecified quantity or portion.
The woman adds some rice to the pot by hand.

Etymology
Old English sum already indicated a certain quantity or an indefinite number. Modern some retains that useful balance: it points to an amount without specifying exactly how much or how many.
In context
so here i'm using some straight black pigment to deepen my shadows i start by just applying a fair amount of it
More examples
- I slice the bread and save some for later.
- Some thirty people attend the meeting.
- My knee still hurts, but it has improved some.
Forms
somewhat adverb — To a limited or moderate extent.